[gnumeric] fn-r: documentation samples for more functions.

[Morten Welinder <mortenw src gnome org>]

commit a10289b5ee8c506e8b504fb067ae66df2caba53d
Author: Morten Welinder <terra gnome org>
Date:   Thu Nov 23 18:30:25 2017 -0500

    fn-r: documentation samples for more functions.

 plugins/fn-r/functions.c |   48 ++++++++++++++++++++++++++++++++++++
 plugins/fn-r/generate    |   61 ++++++++++++++++++++++++++++++++++-----------
 2 files changed, 94 insertions(+), 15 deletions(-)
---
diff --git a/plugins/fn-r/functions.c b/plugins/fn-r/functions.c
index dd3a0e6..27c6589 100644
--- a/plugins/fn-r/functions.c
+++ b/plugins/fn-r/functions.c
@@ -408,6 +408,7 @@ static GnmFuncHelp const help_r_df[] = {
        { GNM_FUNC_HELP_ARG, F_("n2:the second number of degrees of freedom of the distribution") },
        { GNM_FUNC_HELP_ARG, F_("give_log:if true, log of the result will be returned instead") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability density function of the F 
distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.df(1.5,2,3)" },
        { GNM_FUNC_HELP_SEEALSO, "R.PF,R.QF" },
        { GNM_FUNC_HELP_END }
 };
@@ -433,6 +434,7 @@ static GnmFuncHelp const help_r_pf[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the cumulative distribution function of the F 
distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.pf(1.5,2,3)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DF,R.QF" },
        { GNM_FUNC_HELP_END }
 };
@@ -459,6 +461,7 @@ static GnmFuncHelp const help_r_qf[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability quantile function, i.e., the 
inverse of the cumulative distribution function, of the F distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.qf(0.3,2,3)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DF,R.PF" },
        { GNM_FUNC_HELP_END }
 };
@@ -484,6 +487,7 @@ static GnmFuncHelp const help_r_dgamma[] = {
        { GNM_FUNC_HELP_ARG, F_("scale:the scale parameter of the distribution") },
        { GNM_FUNC_HELP_ARG, F_("give_log:if true, log of the result will be returned instead") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability density function of the gamma 
distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.dgamma(3,5,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.PGAMMA,R.QGAMMA" },
        { GNM_FUNC_HELP_END }
 };
@@ -509,6 +513,7 @@ static GnmFuncHelp const help_r_pgamma[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the cumulative distribution function of the 
gamma distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.pgamma(3,5,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DGAMMA,R.QGAMMA" },
        { GNM_FUNC_HELP_END }
 };
@@ -535,6 +540,7 @@ static GnmFuncHelp const help_r_qgamma[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability quantile function, i.e., the 
inverse of the cumulative distribution function, of the gamma distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.qgamma(0.3,5,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DGAMMA,R.PGAMMA" },
        { GNM_FUNC_HELP_END }
 };
@@ -559,6 +565,7 @@ static GnmFuncHelp const help_r_dgeom[] = {
        { GNM_FUNC_HELP_ARG, F_("psuc:the probability of success in each trial") },
        { GNM_FUNC_HELP_ARG, F_("give_log:if true, log of the result will be returned instead") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability density function of the 
geometric distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.dgeom(3,0.2)" },
        { GNM_FUNC_HELP_SEEALSO, "R.PGEOM,R.QGEOM" },
        { GNM_FUNC_HELP_END }
 };
@@ -582,6 +589,7 @@ static GnmFuncHelp const help_r_pgeom[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the cumulative distribution function of the 
geometric distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.pgeom(3,0.2)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DGEOM,R.QGEOM" },
        { GNM_FUNC_HELP_END }
 };
@@ -606,6 +614,7 @@ static GnmFuncHelp const help_r_qgeom[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability quantile function, i.e., the 
inverse of the cumulative distribution function, of the geometric distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.qgeom(0.3,0.2)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DGEOM,R.PGEOM" },
        { GNM_FUNC_HELP_END }
 };
@@ -630,6 +639,7 @@ static GnmFuncHelp const help_r_dgumbel[] = {
        { GNM_FUNC_HELP_ARG, F_("beta:the scale parameter of freedom of the distribution") },
        { GNM_FUNC_HELP_ARG, F_("give_log:if true, log of the result will be returned instead") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability density function of the Gumbel 
distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.dgumbel(2.5,2,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.PGUMBEL,R.QGUMBEL" },
        { GNM_FUNC_HELP_END }
 };
@@ -655,6 +665,7 @@ static GnmFuncHelp const help_r_pgumbel[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the cumulative distribution function of the 
Gumbel distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.pgumbel(2.5,2,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DGUMBEL,R.QGUMBEL" },
        { GNM_FUNC_HELP_END }
 };
@@ -681,6 +692,7 @@ static GnmFuncHelp const help_r_qgumbel[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability quantile function, i.e., the 
inverse of the cumulative distribution function, of the Gumbel distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.qgumbel(0.3,2,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DGUMBEL,R.PGUMBEL" },
        { GNM_FUNC_HELP_END }
 };
@@ -707,6 +719,7 @@ static GnmFuncHelp const help_r_dhyper[] = {
        { GNM_FUNC_HELP_ARG, F_("n:the number of balls drawn") },
        { GNM_FUNC_HELP_ARG, F_("give_log:if true, log of the result will be returned instead") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability density function of the 
hypergeometric distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.dhyper(12,50,450,100)" },
        { GNM_FUNC_HELP_SEEALSO, "R.PHYPER,R.QHYPER" },
        { GNM_FUNC_HELP_END }
 };
@@ -734,6 +747,7 @@ static GnmFuncHelp const help_r_phyper[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the cumulative distribution function of the 
hypergeometric distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.phyper(12,50,450,100)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DHYPER,R.QHYPER" },
        { GNM_FUNC_HELP_END }
 };
@@ -762,6 +776,7 @@ static GnmFuncHelp const help_r_qhyper[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability quantile function, i.e., the 
inverse of the cumulative distribution function, of the hypergeometric distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.qhyper(0.3,50,450,100)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DHYPER,R.PHYPER" },
        { GNM_FUNC_HELP_END }
 };
@@ -788,6 +803,7 @@ static GnmFuncHelp const help_r_dlnorm[] = {
        { GNM_FUNC_HELP_ARG, F_("logsd:standard deviation of the underlying normal distribution") },
        { GNM_FUNC_HELP_ARG, F_("give_log:if true, log of the result will be returned instead") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability density function of the 
log-normal distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.dlnorm(2.5,1,2)" },
        { GNM_FUNC_HELP_SEEALSO, "R.PLNORM,R.QLNORM" },
        { GNM_FUNC_HELP_END }
 };
@@ -813,6 +829,7 @@ static GnmFuncHelp const help_r_plnorm[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the cumulative distribution function of the 
log-normal distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.plnorm(2.5,1,2)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DLNORM,R.QLNORM" },
        { GNM_FUNC_HELP_END }
 };
@@ -839,6 +856,7 @@ static GnmFuncHelp const help_r_qlnorm[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability quantile function, i.e., the 
inverse of the cumulative distribution function, of the log-normal distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.qlnorm(0.3,1,2)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DLNORM,R.PLNORM" },
        { GNM_FUNC_HELP_END }
 };
@@ -864,6 +882,7 @@ static GnmFuncHelp const help_r_dnbinom[] = {
        { GNM_FUNC_HELP_ARG, F_("psuc:the probability of success in each trial") },
        { GNM_FUNC_HELP_ARG, F_("give_log:if true, log of the result will be returned instead") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability density function of the 
negative binomial distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.dnbinom(8,10,0.45)" },
        { GNM_FUNC_HELP_SEEALSO, "R.PNBINOM,R.QNBINOM" },
        { GNM_FUNC_HELP_END }
 };
@@ -889,6 +908,7 @@ static GnmFuncHelp const help_r_pnbinom[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the cumulative distribution function of the 
negative binomial distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.pnbinom(8,10,0.45)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DNBINOM,R.QNBINOM" },
        { GNM_FUNC_HELP_END }
 };
@@ -915,6 +935,7 @@ static GnmFuncHelp const help_r_qnbinom[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability quantile function, i.e., the 
inverse of the cumulative distribution function, of the negative binomial distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.qnbinom(0.3,10,0.45)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DNBINOM,R.PNBINOM" },
        { GNM_FUNC_HELP_END }
 };
@@ -940,6 +961,9 @@ static GnmFuncHelp const help_r_dnorm[] = {
        { GNM_FUNC_HELP_ARG, F_("sigma:standard deviation of the distribution") },
        { GNM_FUNC_HELP_ARG, F_("give_log:if true, log of the result will be returned instead") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability density function of the normal 
distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.dnorm(1,0,1)" },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.dnorm(2,0,1)" },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.dnorm(3,0,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.PNORM,R.QNORM" },
        { GNM_FUNC_HELP_END }
 };
@@ -965,6 +989,9 @@ static GnmFuncHelp const help_r_pnorm[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the cumulative distribution function of the 
normal distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.pnorm(1,0,1)" },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.pnorm(2,0,1)" },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.pnorm(3,0,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DNORM,R.QNORM" },
        { GNM_FUNC_HELP_END }
 };
@@ -991,6 +1018,9 @@ static GnmFuncHelp const help_r_qnorm[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability quantile function, i.e., the 
inverse of the cumulative distribution function, of the normal distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.qnorm(0.3,0,1)" },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.qnorm(0.3,0,1)" },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.qnorm(0.3,0,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DNORM,R.PNORM" },
        { GNM_FUNC_HELP_END }
 };
@@ -1015,6 +1045,7 @@ static GnmFuncHelp const help_r_dpois[] = {
        { GNM_FUNC_HELP_ARG, F_("lambda:the mean of the distribution") },
        { GNM_FUNC_HELP_ARG, F_("give_log:if true, log of the result will be returned instead") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability density function of the 
Poisson distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.dpois(4,4)" },
        { GNM_FUNC_HELP_SEEALSO, "R.PPOIS,R.QPOIS" },
        { GNM_FUNC_HELP_END }
 };
@@ -1038,6 +1069,7 @@ static GnmFuncHelp const help_r_ppois[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the cumulative distribution function of the 
Poisson distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.ppois(4,4)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DPOIS,R.QPOIS" },
        { GNM_FUNC_HELP_END }
 };
@@ -1062,6 +1094,7 @@ static GnmFuncHelp const help_r_qpois[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability quantile function, i.e., the 
inverse of the cumulative distribution function, of the Poisson distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.qpois(0.3,4)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DPOIS,R.PPOIS" },
        { GNM_FUNC_HELP_END }
 };
@@ -1085,6 +1118,7 @@ static GnmFuncHelp const help_r_drayleigh[] = {
        { GNM_FUNC_HELP_ARG, F_("scale:the scale parameter of the distribution") },
        { GNM_FUNC_HELP_ARG, F_("give_log:if true, log of the result will be returned instead") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability density function of the 
Rayleigh distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.drayleigh(2,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.PRAYLEIGH,R.QRAYLEIGH" },
        { GNM_FUNC_HELP_END }
 };
@@ -1108,6 +1142,7 @@ static GnmFuncHelp const help_r_prayleigh[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the cumulative distribution function of the 
Rayleigh distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.prayleigh(2,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DRAYLEIGH,R.QRAYLEIGH" },
        { GNM_FUNC_HELP_END }
 };
@@ -1132,6 +1167,7 @@ static GnmFuncHelp const help_r_qrayleigh[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability quantile function, i.e., the 
inverse of the cumulative distribution function, of the Rayleigh distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.qrayleigh(0.3,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DRAYLEIGH,R.PRAYLEIGH" },
        { GNM_FUNC_HELP_END }
 };
@@ -1157,6 +1193,7 @@ static GnmFuncHelp const help_r_dsnorm[] = {
        { GNM_FUNC_HELP_ARG, F_("scale:the scale parameter of the distribution") },
        { GNM_FUNC_HELP_ARG, F_("give_log:if true, log of the result will be returned instead") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability density function of the 
skew-normal distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.dsnorm(3,2,0,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.PSNORM,R.QSNORM" },
        { GNM_FUNC_HELP_END }
 };
@@ -1184,6 +1221,7 @@ static GnmFuncHelp const help_r_psnorm[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the cumulative distribution function of the 
skew-normal distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.psnorm(3,2,0,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DSNORM,R.QSNORM" },
        { GNM_FUNC_HELP_END }
 };
@@ -1212,6 +1250,7 @@ static GnmFuncHelp const help_r_qsnorm[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability quantile function, i.e., the 
inverse of the cumulative distribution function, of the skew-normal distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.qsnorm(0.3,2,0,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DSNORM,R.PSNORM" },
        { GNM_FUNC_HELP_END }
 };
@@ -1238,6 +1277,7 @@ static GnmFuncHelp const help_r_dst[] = {
        { GNM_FUNC_HELP_ARG, F_("shape:the shape parameter of the distribution") },
        { GNM_FUNC_HELP_ARG, F_("give_log:if true, log of the result will be returned instead") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability density function of the skew-t 
distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.dst(2,5,2)" },
        { GNM_FUNC_HELP_SEEALSO, "R.PST,R.QST" },
        { GNM_FUNC_HELP_END }
 };
@@ -1263,6 +1303,7 @@ static GnmFuncHelp const help_r_pst[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the cumulative distribution function of the 
skew-t distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.pst(2,5,2)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DST,R.QST" },
        { GNM_FUNC_HELP_END }
 };
@@ -1289,6 +1330,7 @@ static GnmFuncHelp const help_r_qst[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability quantile function, i.e., the 
inverse of the cumulative distribution function, of the skew-t distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.qst(0.3,5,2)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DST,R.PST" },
        { GNM_FUNC_HELP_END }
 };
@@ -1313,6 +1355,7 @@ static GnmFuncHelp const help_r_dt[] = {
        { GNM_FUNC_HELP_ARG, F_("n:the number of degrees of freedom of the distribution") },
        { GNM_FUNC_HELP_ARG, F_("give_log:if true, log of the result will be returned instead") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability density function of the 
Student t distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.dt(1.5,5)" },
        { GNM_FUNC_HELP_SEEALSO, "R.PT,R.QT" },
        { GNM_FUNC_HELP_END }
 };
@@ -1336,6 +1379,7 @@ static GnmFuncHelp const help_r_pt[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the cumulative distribution function of the 
Student t distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.pt(1.5,5)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DT,R.QT" },
        { GNM_FUNC_HELP_END }
 };
@@ -1360,6 +1404,7 @@ static GnmFuncHelp const help_r_qt[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability quantile function, i.e., the 
inverse of the cumulative distribution function, of the Student t distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.qt(0.3,5)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DT,R.PT" },
        { GNM_FUNC_HELP_END }
 };
@@ -1440,6 +1485,7 @@ static GnmFuncHelp const help_r_dweibull[] = {
        { GNM_FUNC_HELP_ARG, F_("scale:the scale parameter of the distribution") },
        { GNM_FUNC_HELP_ARG, F_("give_log:if true, log of the result will be returned instead") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability density function of the 
Weibull distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.dweibull(2.1,1.5,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.PWEIBULL,R.QWEIBULL" },
        { GNM_FUNC_HELP_END }
 };
@@ -1465,6 +1511,7 @@ static GnmFuncHelp const help_r_pweibull[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the cumulative distribution function of the 
Weibull distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.pweibull(2.1,1.5,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DWEIBULL,R.QWEIBULL" },
        { GNM_FUNC_HELP_END }
 };
@@ -1491,6 +1538,7 @@ static GnmFuncHelp const help_r_qweibull[] = {
        { GNM_FUNC_HELP_ARG, F_("lower_tail:if true (the default), the lower tail of the distribution is 
considered") },
        { GNM_FUNC_HELP_ARG, F_("log_p:if true, the natural logarithm of the probability is given or 
returned; defaults to false") },
        { GNM_FUNC_HELP_DESCRIPTION, F_("This function returns the probability quantile function, i.e., the 
inverse of the cumulative distribution function, of the Weibull distribution.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=r.qweibull(0.3,1.5,1)" },
        { GNM_FUNC_HELP_SEEALSO, "R.DWEIBULL,R.PWEIBULL" },
        { GNM_FUNC_HELP_END }
 };
diff --git a/plugins/fn-r/generate b/plugins/fn-r/generate
index 8e91488..f429b3f 100644
--- a/plugins/fn-r/generate
+++ b/plugins/fn-r/generate
@@ -32,19 +32,27 @@ my %defaults;
         'normal',
         ({ 'mu' => "mean $of",
            'sigma' => "standard deviation $of",
-           @common })];
+           @common }),
+        [ { 'x' => 1, 'mu' => 0, 'sigma' => 1 },
+          { 'x' => 2, 'mu' => 0, 'sigma' => 1 },
+          { 'x' => 3, 'mu' => 0, 'sigma' => 1 } ],
+       ];
 
     $funcs{'dlnorm'} = $funcs{'plnorm'} = $funcs{'qlnorm'} =
        [\&distribution,
         'log-normal',
         ({ 'logmean' => "mean of the underlying normal distribution",
            'logsd' => "standard deviation of the underlying normal distribution",
-           @common })];
+           @common }),
+        [ { 'x' => 2.5, 'logmean' => 1, 'logsd' => 2 } ],
+       ];
 
     $funcs{'dgamma'} = $funcs{'pgamma'} = $funcs{'qgamma'} =
        [\&distribution,
         'gamma',
-        ({ @common })];
+        ({ @common }),
+        [ { 'x' => 3, 'shape' => 5, 'scale' => 1 } ],
+       ];
 
     $funcs{'dbeta'} = $funcs{'pbeta'} = $funcs{'qbeta'} =
        [\&distribution,
@@ -59,14 +67,18 @@ my %defaults;
        [\&distribution,
         'Student t',
         ({ 'n' => "the number of degrees of freedom $of",
-           @common })];
+           @common }),
+        [ { 'x' => 1.5, 'n' => 5 } ],
+       ];
 
     $funcs{'df'} = $funcs{'pf'} = $funcs{'qf'} =
        [\&distribution,
         'F',
         ({ 'n1' => "the first number of degrees of freedom $of",
            'n2' => "the second number of degrees of freedom $of",
-           @common })];
+           @common }),
+        [ { 'x' => 1.5, 'n1' => 2, 'n2' => 3 } ],
+        ];
 
     $funcs{'dchisq'} = $funcs{'pchisq'} = $funcs{'qchisq'} =
        [\&distribution,
@@ -79,13 +91,17 @@ my %defaults;
     $funcs{'dweibull'} = $funcs{'pweibull'} = $funcs{'qweibull'} =
        [\&distribution,
         'Weibull',
-        ({ @common })];
+        ({ @common }),
+        [ { 'x' => 2.1, 'shape' => 1.5, 'scale' => 1 } ],
+       ];
 
     $funcs{'dpois'} = $funcs{'ppois'} = $funcs{'qpois'} =
        [\&distribution,
         'Poisson',
         ({ 'lambda' => "the mean $of",
-           @common })];
+           @common }),
+        [ { 'x' => 4, 'lambda' => 4 } ],
+       ];
 
     $funcs{'dexp'} = $funcs{'pexp'} = $funcs{'qexp'} =
        [\&distribution,
@@ -109,7 +125,9 @@ my %defaults;
         ({ 'n' => 'required number of successes',
            'psuc' => "the probability of success in each trial",
            @common,
-           'x' => 'observation (number of failures)' })];
+           'x' => 'observation (number of failures)' }),
+        [ { 'x' => 8, 'n' => 10, 'psuc' => 0.45 } ],
+       ];
 
     $funcs{'dhyper'} = $funcs{'phyper'} = $funcs{'qhyper'} =
        [\&distribution,
@@ -117,7 +135,9 @@ my %defaults;
         ({ 'r' => "the number of red balls",
            'b' => "the number of black balls",
            'n' => "the number of balls drawn",     
-           @common })];
+           @common }),
+        [ { 'x' => 12, 'r' => 50, 'b' => 450, 'n' => 100 } ],
+       ];
 
     $funcs{'dcauchy'} = $funcs{'pcauchy'} = $funcs{'qcauchy'} =
        [\&distribution,
@@ -131,19 +151,25 @@ my %defaults;
        [\&distribution,
         'geometric',
         ({ 'psuc' => "the probability of success in each trial",
-           @common })];
+           @common }),
+        [ { 'x' => 3, 'psuc' => 0.2 } ],
+       ];
 
     $funcs{'dsnorm'} =  $funcs{'psnorm'} =  $funcs{'qsnorm'} =
        [\&distribution,
         'skew-normal',
         ({ 'location' => "the location parameter $of",
-           @common })];
+           @common }),
+        [ { 'x' => 3, 'shape' => 2, 'location' => 0, 'scale' => 1 } ],
+       ];
 
     $funcs{'dst'} = $funcs{'pst'} = $funcs{'qst'} =
        [\&distribution,
         'skew-t',
         ({ 'n' => "the number of degrees of freedom $of",
-           @common })];
+           @common }),
+        [ { 'x' => 2, 'n' => 5, 'shape' => 2 } ],
+       ];
 
     $funcs{'ptukey'} = $funcs{'qtukey'} =
        [\&distribution,
@@ -151,7 +177,8 @@ my %defaults;
         ({ 'nranges' => "the number of ranges; default is 1",
            'nmeans' => "the number of means",
            'df' => "the number of degrees of freedom $of",
-           @common })];
+           @common }),
+       ];
     $defaults{'ptukey:nranges'} = $defaults{'qtukey:nranges'} = 1;
 
     $funcs{'dgumbel'} = $funcs{'pgumbel'} = $funcs{'qgumbel'} =
@@ -159,12 +186,16 @@ my %defaults;
         'Gumbel',
         ({ 'mu' => "the location parameter of freedom $of",
            'beta' => "the scale parameter of freedom $of",
-           @common })];
+           @common }),
+        [ { 'x' => 2.5, 'mu' => 2, 'beta' => 1 } ],
+       ];
 
     $funcs{'drayleigh'} = $funcs{'prayleigh'} = $funcs{'qrayleigh'} =
        [\&distribution,
         'Rayleigh',
-        ({ @common })];
+        ({ @common }),
+        [ { 'x' => 2, 'scale' => 1 } ],
+       ];
 }