Probability density functions (PDF) in Matlab 2012a or earlier

Does anyone know how to calculate PDF in Matlab version 2012a or earlier?

If I used the following default code in Matlab for PDF, I'll see the following error:

mu = 0;
sigma = 1;
pd = makedist('Normal',mu,sigma);
x = [-2 -1 0 1 2];
y = pdf(pd,x)

Undefined function 'makedist' for input arguments of type 'char'.

Answer 1

[Phil]

I actually just ran into this problem this morning, which resulted in me updating to a newer version of Matlab. I think this is because 2012a does not have the makedist function or the associated toolboxes to make it work. That came about in newer releases of Matlab. I know this doesn't answer your question of how to make it work, but it hopefully explains why it isn't working.

Answer 2

[Image Analyst]

I don't know exactly what that does but if it gives you a sampling of numbers drawn from a normal distribution with a specified mu and sigma, you could use randn() instead.