Is lyapExp working properly?

WHEN I ENTER AT MATLAB PROMPT: lyap = lyapunovExponent(x,50). x is my signal and fs=50 Hz.

I GET THE FOLLOWING LIST OF ERROR MESSAGES:

Not enough input arguments.

Error in rms (line 17)

delta = windowlength - overlap;

Error in enbw (line 33)

bw = (rms(window)/mean(window))^2;

Error in psdparserange>parseTime (line 84)

rbw = enbw(w,fs);

Error in psdparserange (line 35)

[Pxx, F, Frange, rbw] = parseTime(funcName, beta, varargin{1:min(n,3)});

Error in meanfreq (line 63)

[Pxx, F, Frange, rbw, extraArgs, status] = psdparserange('meanfreq',

kaiserBeta, varargin{:});

Error in lyapunovExponent>parseAndValidateInputs (line 199)

MinSeparation = ceil(fs/max(meanfreq(x,fs)));

Error in lyapunovExponent (line 54)

[x, fs, dim, lag, ExpansionRange, MinSeparation, isSingle] =

parseAndValidateInputs(x, varargin{:});

Answer 1

[Bora Eryilmaz]

Hi Gerald,

Could you help determine which "rms" command the top error from your error trace is coming from:

Error in rms (line 17)

delta = windowlength - overlap;

When you run the following in the Command Window:

which -all rms

is the top output something like "...matlab\toolbox\signal\signal\rms.m"

It looks like another "rms.m" might be shadowing the ...\signal\rms.m command.

Best Regards,

Bora