Matlab FFT vs LabVIEW FFT

[mcduff]

Not sure why transpose does not work.

What exactly is Matlab doing? By definition the 2d FFT of a matrix is a FFT in the x(row) direction and a FFT in the y(column) direction. You said Matlab is just doing the FFT on the columns, if that is the case then the following may work.

Two Different Methods, your choice

 mcduff

[etedwin]

Hi mcbuff,

Thanks for the solution, it is what i am looking for.

[Gildardo18]

I have a problem, after doing the Fourier transform in labview I get two positive and negative peaks in "y" but they are out and aligned, I did the procedure in matlab and if I get the right peaks aligned, Why do not I do well in labview?

[Bob_Schor]

Please do not "hijack" an old post.  If you have a new question and a new problem with your code, start a new post, attach your code (please attach VIs, not pictures of parts of your Block Diagram, which are difficult to edit and execute).  Explain what you want to do, what you expect the answer to be, and if data are involved, attach example data.

Bob Schor

[Gildardo18]

I´m really sorry, but a do not know how to create a new question in this blog.

[Bob_Schor]

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@Gildardo18 wrote:

I´m really sorry, but a do not know how to create a new question in this blog.

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Go to the top of this Forum (https://forums.ni.com/t5/LabVIEW/bd-p/170?lang=en).  Scroll down a little until you see the big Blue Button "Start a Topic".  Push it, make an informative Title, and ask your question, posting your code.

Bob Schor