PDFPLOT displays a histogram of the empirical probability density function (PDF) for the data in the input array X using nbins number of bins.
If input X is a matrix, then pdfplot(X) parses it to the vector and displays PDF of all values.
For complex input X, pdfplot(X) displays PDF of abs(X).
y = randn( 1, 1e5 );
pdfplot( y );
pdfplot( y, 100 );
[f,xi] = ksdensity(X, 'npoints', 1000);
As somebody other already mentioned:
Be careful, to get the real PDF estimate replace
Nothing more than just a standard histogram with cleverly chosen bins. Much better techniques exist to display a pdf. On top of that, it is buggy (although this can be easily fixed by the fix proposed in one of the other reviews).
Yes, the fix suggested by Tim Hattrell
returns the correct pdf. Thanks Tim
I don't think this calculates the correct PDF as the area under the graph is not one. Replace bar(X, N/sum(N)); with bar(X, N/sum(N)/step); to fix this.
It would be nice if you could do Ntigram as for pdf you generally need variable bin sizes.
Okey, i seem it to be my need but not. This is not new thing, a little simple.
good job - what I need.
unbelievable it's not included in stat. toolbox
just what i want, thank you
check how it works:
Allows visualization of the data. An extremely useful utility.
whats the numel function?? its not specified
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