MATLAB: Optimize for ‘double’

arraycodedoubleintegeroptimization

Dear All

I am wondering is there any special optimization in MATLAB for double arrays? I have the feeling that UINT is a little slower than double array, although the reduced memory space is considerable. I need to make a trade off between speed and space now.

Thanks!

Best Answer

These days it is common for CPUs to have faster floating point instructions than integer instructions.

For larger double arrays, I believe the optimized LAPACK or similar libraries may be invoked; I am not sure if those are invoked for other data types.

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MATLAB: Using int64 on a lower bit data class

int64() of int32 data just sign extends

int64() of uint32 data just zero extends

uint64() of int32 data would result in 0 for any negative data because of saturation

uint64 of uint32 data would just 0 extend.

MATLAB: Input arguments must be ‘double’

If x is an audiorecorder object it's no wonder you get this error. You need to use the object to actually record and then get the recorded data, something like

recorder = auiorecorder(Fs, 16, 2);
input('say AHEAD immediately after hitting enter');
recorder.recordblocking(2);  %to record for 2 seconds
[s(i, i), g] = lpc(recorder.getaudiodata, 12);

Best Answer

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MATLAB: Using int64 on a lower bit data class

MATLAB: Input arguments must be ‘double’

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