How to do 1D FFT for every row of a 2D array?

[altenbach]

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johnsasikennedy@gmil.com wrote:

I am new to labview.

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Yes, we are aware of that. Still, your posts contain basically no information on what you actually want and your VIs make very little sense.

Please write at least a paragraph telling us what you actually want to do with all this..

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johnsasikennedy@gmil.com wrote:

I need it urgent.

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First you need to help us explaining things in more detail.

[johnsasikennedy@gmil.com]

i have time and amplitude in text file. i have to plot it in xy graph and after that i need to get fft for that graph with a frequency of 50 hz.

Sorry for my english. 

[altenbach]

... and please make a decision where you want to discuss this (e.g. here or here). THere should be exactly one active discussion about the same thing.

[johnsasikennedy@gmil.com]

here itself 

[johnsasikennedy@gmil.com]

Hi altenbach,

Are u clear with my question???

[camerond]

If I understand correctly, you are starting with a text (spreadsheet-like) file of amplitude vs time and want to find how high the 50 Hz component of that data is, you don't care about anything else?

As I see it, you are going to have two problems here:

1.  The LV FFT function assumes that you have evenly-spaced points (your time axis) and you don't. You're going to need to fix that with interpolation.

2.  You have not read the LV Help file on the FFT function all the way down to the "FFT Details" part which will fix your other problem.

And what's the deal about "Waveform Graph"? I don't see any point to that one.

Help files are your friends. They really want to help you, please let them.

Cameron

[altenbach]

continued here.