Counts the number of times the signal crosses zero

Hello there

I trying to counts the number of times the signal crosses zero. I am using this syntax (zcd = dsp.ZeroCrossingDetector) to do that, but Matlab helps showing me an error “Dot indexing is not supported for variables of this type.”.

zcd = data.ZeroCrossingDetector;
numZeroCross = zcd(data)
release (zcd)

I have attached the data file.

Could any one help with that?

Thank you

Answer 1

[dpb]

Use

zcd = dsp.ZeroCrossingDetector;

to create the object per the documentation. Then you pass that object the data...

numZeroCross = zcd(data)
release (zcd)

should work presuming the .mat file contains a vector or array data

Most interesting/peculiar it counts peaks but doesn't also optionally return locations...one would have to repeat the work to do that as well.