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I need to perform a FFT of an array of vectors. If I solve it via N-loop the calculation takes time. It would be much faster if I could pass the full matrix to a function in C++ code. Is there such a possibility or a trick to speed up the calculation with available LV 7.0 functions? Thanks in advance for your help.
NI FFT VIs save some internal info to speed up the computation if you perform the same size FFT repeadly (This is just your case--N vectors of the same size). So you can just solve your problem via N-loop. Don't worry about it. NI FFT knows how to take advantage of the same size in the continuous computation.