Counts the number of times the signal crosses zero

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Ahmed Alalawi
Ahmed Alalawi 2020-2-11
回答： dpb 2020-2-11
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

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回答（1 个）

dpb
dpb 2020-2-11
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.

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