[pmwiki-users] zap - save math output to a variable

[The Editor]

On 9/20/07, Karl <kharris at bnin.net> wrote:
> Thx for the message
>
> So in the example you gave, is math the name of a variable?

Yes and no. It is the name of the field (in zap, special fields are
called commands). When saved though, it also becomes the name of a
page text variable.

> here is the syntax of my current zap form:
>
> --------------------------------
> (:input text E1 {$:E1} size=4:)
> (:input text E2 {$:E2} size=4:)
> (:input text E3 {$:E3} size=4:)
> (:input text E4 {$:E4} size=4:)
> (:input text E5 {$:E5} size=4:)
> (:input text E6 {$:E6} size=4:)
> (:input text E7 {$:E7} size=4:)
>
> Total {(math
> '{$:E1}+{$:E2}+{$:E3}+{$:E4}+{$:E5}+{$:E6}+{$:E7}')}
> --------------------------------
>
> what I want to do is assign the output of the math calculation to another
> variable for use in another calculation.

Try something like this:

(:input text E1 {$:E1} size=4:)
(:input text E2 {$:E2} size=4:)
(:input text E3 {$:E3} size=4:)
(:input text E4 {$:E4} size=4:)
(:input text E5 {$:E5} size=4:)
(:input text E6 {$:E6} size=4:)
(:input text E7 {$:E7} size=4:)

(:zap math="{E1}+{E2}+{E3}+{E4}+{E5}+{E6}+{E7}":)
(:zap Esum="{math}":)
(:zap savedata="E1,E2,E3,E4,E5,E6,E7,Esum":)

Basically it calculates the sum then assigns that value to the field
Esum (you could just save it as math of course). So in the page
{$:Esum} should give you the total.

Dan