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Re: Calculating difference between each element in array from previous [message #83805 is a reply to message #83680]

Fri, 29 March 2013 19:03

dg86
Messages: 118
Registered: September 2012

Senior Member

On Friday, March 29, 2013 8:07:08 PM UTC-4, Phillip Bitzer wrote:
> For a start, I think I see where you are differencing adjacent elements of an array. This can be done without looping:
>
>
>
> diff = arr - SHIFT(arr, 1)
>
>
>
> Note SHIFT will wrap around values, so if that's not important you'll want to "mask" this values somehow.

How about

diff = arr - arr[1:*]

This addresses the wrap-around issue.

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		Calculating difference between each element in array from previous By: morganlsilverman on Fri, 29 March 2013 07:43
		Re: Calculating difference between each element in array from previous By: dg86 on Fri, 29 March 2013 19:03

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