For some signal processing code (to be used in LV RT, but that should not matter), I get some input data as single data from the AI buffered read.vi and have to deliver as single data to AO buffer write.vi. In between, I build arrays of the data, do matrix computations and have to do also some complex computations.
As many of the linear algebra vis are not available for single types (single or complex single), I have to use them for the double types. Now, my question: Are there some general rules or recommendations on how and where to make the type casts? For example, a) is it more useful to do the type casts directly after/before I/O operations to avoid additional casts or to do them more close to the computations to save memory for intermediate data arrays? b) Is it more useful to use a complex representation for real data in order to avoid implicit type casts at mixed real/complex computation vis or is it more useful to save the memory for the unnecessary imaginary part? Target processor will be a PIII with Labview RT 7 in this special case and my problem is time critical, not so much memory limited. Any hint is welcome! Regards, acoustics
