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Re: Help for inversing function.


From: Ben Abbott
Subject: Re: Help for inversing function.
Date: Tue, 17 Jan 2012 15:23:21 -0500

On Jan 17, 2012, at 12:14 PM, kleysonr wrote:

> Thank you for the anwser,
> 
> I have already tried that, but it works only for diff(data, 1) and I need
> also include the first element in the begin of the vector:
> 
> data = [73; 83; 135; 200; 288; 300; 267; 251; 302; 381]
> 
>> [data cumsum([73;diff(data,1)])]
> ans =
> 
>    73    73
>    83    83
>   135   135
>   200   200
>   288   288
>   300   300
>   267   267
>   251   251
>   302   302
>   381   381
> 
> But for diff(data, 2), doesn't work.
> 
>> [orig cumsum([73;83;diff(orig,2)],2)]
> ans =
> 
>    73    73
>    83    83
>   135    42
>   200    13
>   288    23
>   300   -76
>   267   -45
>   251    17
>   302    67
>   381    28
> 
> Regards.
> Kleyson Rios.

Opps. The problem is that diff takes three inputs.

Use "diff (x, 1, DIM)"

Ben




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