*From*: Oliver Burnett-Hall <olly burnett-hall co uk>*To*: gnumeric-list gnome org*Subject*: Re: Array formulas, piecewise functions*Date*: Wed, 14 Sep 2005 18:43:59 +0100

Stephen R Laniel wrote:

1) I'm familiar with array formulas from Excel, such that one can do formulas like =sum(if(and($G$2:$G$30000>=H2,$G$2:$G$30000<H3),1,0))

[...]

It shares a lot of similarities, apparently, with Excel's array formulas, but it's not working for me. How do I have to change the Excel formula to make it work in Gnumeric?

=SUM(($G$2:$G$30000>=H2)*($G$2:$G$30000<H3)) This works in Excel too.

2) I have a piecewise function defined as follows: f(t) = (1/2)t^2 , 0 < t < 1 = -(t^2 - 3t + 3/2), 1 < t < 2 = (1/2)(3-t)^2 , 2 < t < 3 = 0 elsewhere In Excel, assuming t was in column A, I'd do something like so: =if(and(0<a1,a1<1),.5*a1^2,if(and(1<a1,a1<2),-(a1^2-3*a1+3/2),...)) It's a mess, but that's what I'd do. I can't get that to work in Gnumeric; it's returning FALSE or TRUE when it should be returning a value.

If you can't see anything wrong, post the complete function here. HTH, - olly

**Follow-Ups**:**Re: Array formulas, piecewise functions***From:*Stephen R Laniel

**References**:**Array formulas, piecewise functions***From:*Stephen R Laniel

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