why wavelet decomposition maximum level wmaxlev instruction returns an imaginary answer?

Hi, when using the instruction wmaxlev(signal,'type of wavelet') the ans is returned imaginary , how can I get rid of it?

Answer 1

[Wayne King]

Can you please show us some example code that does this?

The first input argument to wmaxlev is not the signal, it is the length of the signal or the size of the image

For example, suppose you had a signal of length 1024 and you were using the 'sym4' wavelet.

wmaxlev(1024,'sym4')

or imagine you had a 512x512 image

wmaxlev([512 512],'sym4')

[sara authafa]

that's right,I found it recently,the reason is giving the first argument as a signal not the length of it,Thank you.