fft vs ifft

[detech]

Hi, I need an example for FFT to iFFT. I have a real array to do FFT and want some frequencies to be zero and then do IFFT. I know there are some filter vis, but I really need to use a simpel FFT and IFFT to do this job.

Please advice. Thanks

[GregFreeman]

There are FFT and iFFT VIs located in the signal processing -> transforms section of the functions palette

[smercurio_fc]

moved here

[detech]

If you can not help, please do not reply. You confuse me. Please let expert do their job

[smercurio_fc]

My post is to indicate that you decided to ask the same exact question as a new thread, instead of just replying to this thread, so I'm indicating that you've decided to move the question to another thread. Likewise, in the new thread I indicated that the question is the same as this one, so that others who decide to try to help you (by using up their time, which they volunteer to do) can see what has already been suggested. Creating new threads to ask the same exact question is counter-productive. It causes people who are trying to help you to not know what has already been suggested, and they often end up suggesting the same things that have already been suggested.

Is that less confusing for you?

Remember that a good answer starts with a good question.

P.S. Let me know what you consider to be an expert, so I'll make sure to never answer to questions.

[detech]

My question is clear. I did not get right answer yet. I bought ni cards. I paid for labview service. I need NI expert to help. There are some relies, making non-sense, but looks it is answered. That is why I post again. And you try to link to the old one. I am not against you. I just want some NI guy can really take care of my request.

[smercurio_fc]

Then you should be contacting NI support directly by picking up the phone and calling them. This is a public discussion forum made up primarily of volunteers. There is no guarantee of support on these forums. I, like many other contributors on this forum, do not work for NI. We take time to try to help people. Most people, unlike you, seem to be quite appreciative of this.

And asking the question multiple times doesn't help. It just irritates people.

[detech]

It waste time to talk this much. I think there is a simple reply answering my question already.

I do appriciate this forum, and get 100% my question answered. This is the first time I have problem with person like you. Anyway I still appriciate your time.

[Coq_Rouge]

You should read this http://zone.ni.com/devzone/cda/tut/p/id/4278 Then we can discuss your problem further

[GregFreeman]

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@detech wrote:

It waste time to talk this much. I think there is a simple reply answering my question already.

I do appriciate this forum, and get 100% my question answered. This is the first time I have problem with person like you. Anyway I still appriciate your time.

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Have you gotten your question answered yet? You asked the question 6 days ago. I find it hard to believe that calling National Instruments directly would have resulted in taking longer than 6 days to solve your problem. But, that's just my opinion.