Question
I have time series data.I want to see the plot of PDF.For this, in MATLAB,I have to mention the name of the PDF-type like 'norm'.All PDF types are continuous line.But,I need discrete PDF data points plot.
Related Questions
Expert Answer
Kshitij Singh
PhD Expert
Answered Nov 20, 2025
Are you sure that you need a discrete PDF? You have not specified that your time series takes on values only in a discrete set, e.g. {0,1}.
Just because you have a discrete-time process, it can very well be that you should model the random variables as continuous.
For example:
x = randn(100,1);
gives a realization of a discrete-time white Gaussian noise process, but it is not a discrete random variable.
Do you have a specific pdf that you would like to assess for your data?
You can always use ksdensity to estimate the pdf
x = randn(100,1); [f,xi] = ksdensity(x); plot(xi,f);
If you want to see if your data follow a certain distribution, see histfit, or dfittool
Have a different question? Ask here