where to find helperCWTTimeFreqPlot()?

i couldn't find the functions helperCWTTimeFreqPlot(),helperCWTTimeFreqVector() functions in matlab neither in google. how can i fix this problem please. thank you !

Answer 1

[Walter Roberson]

helperCWTTimeFreqPlot is part of the Wavelet Toolbox examples in R2015b and R2016a. If you have one of those installed then you can find it in

fullfile(toolboxdir('wavelet'),'wavedemo')

[Isayiyas Nigatu]

thank you very much sir! i have been using R2015a. i will switch to the recommended version soon.

[Walter Roberson]

In R2016a, the demos that use this are CWTTimeFrequencyExample, FinancialDataExample, and PhysiologicSignalAnalysisExample

As of R2016b, wavedemo was replaced by Wavelet Toolbox Examples, https://www.mathworks.com/help/releases/R2016b/wavelet/examples.html

The Physiological signal example was replaced by

openExample('wavelet/PhysiologicSignalAnalysisExample')

which does not need the helper function due to improvements in the cwt function.

Answer 2

[Ana Cadavid]

How can I get the routine if I have version 2017a?

[Walter Roberson]

As of R2016b, the cwt() function was enhanced to choose scales automatically, so this function was no longer needed. It is not present as of R2016b.

[Christian Silva]

Just go to the folder that contains the PhsycologicSignalAnalysisExample and the function is there. Copy it to your working folder and voila!

[Michael]

Just to clarify, the helperCWTTimeFreqPlot() and helperCWTTimeFreqVector() functions can be found in the folder:

'path_to_matlab/MATLAB/Examples/wavelet/PhysiologicSignalAnalysisExample/'