[gnumeric] Stat: add a few documentation examples.

[Morten Welinder <mortenw src gnome org>]

commit f4c4a9f33bf561da83ea7a51435499df8a4c2038
Author: Morten Welinder <terra gnome org>
Date:   Wed Nov 29 14:14:23 2017 -0500

    Stat: add a few documentation examples.

 plugins/fn-stat/functions.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/plugins/fn-stat/functions.c b/plugins/fn-stat/functions.c
index 50f454d..c477a64 100644
--- a/plugins/fn-stat/functions.c
+++ b/plugins/fn-stat/functions.c
@@ -2190,6 +2190,7 @@ static GnmFuncHelp const help_pearson[] = {
        { GNM_FUNC_HELP_ARG, F_("array2:second component values")},
        { GNM_FUNC_HELP_DESCRIPTION, F_("Strings and empty cells are simply ignored.")},
        { GNM_FUNC_HELP_EXCEL, F_("This function is Excel compatible.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=PEARSON({1,2,3},{3,4,4})" },
        { GNM_FUNC_HELP_SEEALSO, "INTERCEPT,LINEST,RSQ,SLOPE,STEYX"},
        { GNM_FUNC_HELP_END }
 };
@@ -2209,6 +2210,7 @@ static GnmFuncHelp const help_rsq[] = {
        { GNM_FUNC_HELP_ARG, F_("array2:second component values")},
        { GNM_FUNC_HELP_DESCRIPTION, F_("Strings and empty cells are simply ignored.")},
        { GNM_FUNC_HELP_EXCEL, F_("This function is Excel compatible.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=RSQ({1,2,3},{3,4,4})" },
        { GNM_FUNC_HELP_SEEALSO, ("CORREL,COVAR,INTERCEPT,LINEST,LOGEST,PEARSON,SLOPE,STEYX,TREND")},
        { GNM_FUNC_HELP_END }
 };
@@ -4294,6 +4296,7 @@ static GnmFuncHelp const help_growth[] = {
                                        "growth by using this curve.")},
        { GNM_FUNC_HELP_DESCRIPTION, F_("GROWTH returns an array having one column and a row for each "
                                        "data point in @{new_xs}.") },
+       { GNM_FUNC_HELP_EXAMPLES, "=GROWTH({1,2,3},{3,4,4},{6})" },
        { GNM_FUNC_HELP_NOTE, F_("If @{known_ys} and @{known_xs} have unequal number of data points, "
                                 "this function returns a #NUM! error.") },
        { GNM_FUNC_HELP_SEEALSO, "LOGEST,GROWTH,TREND"},