I am using CWT through
biwavelet package to generate results of the Continuous Wavelet Spectrum of a time series. I have 245 observations of the time series. I used the below code and it correctly produced the graph.
EXR = data.frame(1:245,EX) plot(wt(EXR), main="Continuous Wavelet Spectrum:C")
However, on the x-axis I get numbers from 0 to 240. I want to mention the date on the x-axis. Therefore, I made changes int the code as follows:
EXR = data.frame(date,EX) plot(wt(EXR), main="Continuous Wavelet Spectrum:C")
The following error is produced after the new code.
Error in check.datum(d) : The step size must be constant (see approx function to interpolate)
How I can rectify this error.