usage advanced blocks FFT blocks in project Standart blockset

Hi all! I figured out the problem posed.

Model:https://www.alteraforum.com/forum/attachment.php?attachmentid=10516

Input func:https://www.alteraforum.com/forum/attachment.php?attachmentid=10514

Furrier coeff:https://www.alteraforum.com/forum/attachment.php?attachmentid=10515

OutputFunc:https://www.alteraforum.com/forum/attachment.php?attachmentid=10517

Now, I want to know: How can I reduce the number of Fourier coefficients.

I want to make the Fourier transform of the period of 8192 points. But I do not want all of 8192 coefficients , I will have enough and no more than 20.

Matlab file: http://ge.tt/1vjrite2

I solved all problems =) model works =)

I want to make the Fourier transform of the period of 8192 points. But I do not want all the 8192 coefficients,

I will have enough and no more than 20.

How i can get only first 20 and usage only 20 for retriving function, then improve performance and minimize the cost of memory for storing coefficients.

Work model http://ge.tt/1vjrite2 - adaptedModelWithCordic.mdl

I solved all problems =) model works =)

I want to make the Fourier transform of the period of 8192 points. But I do not want all the 8192 coefficients,

I will have enough and no more than 20.

How i can get only first 20 and usage only 20 for retriving function, then improve performance and minimize the cost of memory for storing coefficients.