# Plot of Probability Density function in MATLAB

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.

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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