Convolution between an Identity Approximation and a given function

Hi all,

I try to do a convolution between an Identity Approximation G and a given function S. From a theoretical point of view, we have the property:

But when i'm trying to have the same property in Matlab with the function 'conv':

         Sconv = conv(S, g);  it doesn't work properly (see figures below).

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Do you have any ideas why is this happening?

Many thanks...

[Image Analyst]

What is f? Is that another name for S? What code did you use to get S (or f) and g into aRrays in MATLAB? Obviously if g = [0 0 1 0 0], then Sconv will equal S.

[Mac Bekcheva]

Sorry, f is S in the figure

[Image Analyst]

Please finish your reply. Give us code to make your figure and demonstrate the problem. Otherwise how can we fix it?

[Mac Bekcheva]

I know but the code is too long. Anyway, the problem is solved. Thanks for your interest. Best, Mac