You can do
(_1 + 2 %~/\ ]) 4 5 3
0.25 _0.4
which uses Insert / and Infix \
--Kip Murray
Sent from my iPad
> On Feb 17, 2014, at 5:30 AM, Joe Bogner <[email protected]> wrote:
>
> From the J in 5 minutes thread, I'm starting to build my example
>
> In my example, I'm working with stock prices. One of the the outputs is a
> daily % change over the previous day
>
> I want the code to be clean. Is there a cleaner way to express this, or
> would this be considered fine?
>
> I want to calculate % change of y over x
>
> Nums=.i.10
> pctChange=:3 : '((}. y) % (}: y)) -1'
>
> pctChange Nums
> _ 1 0.5 0.333333 0.25 0.2 0.166667 0.142857 0.125
>
> pctChange 4 5 3
> 0.25 _0.4
>
>
> It seemed like I should have been able to do something with Insert, but I
> can't figure it out.
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