How to get a 2D matrix estimate from Ksdensity for bivariate data

Hello,

I'm trying to get the function ksdensity to return a matrix instead of a vector when I use it for a bivariate input (signal of I and Q).

The problem is that ksdensity only returns a vector even if the points are inputted as a 2 column matrix.

Can anybody help ?

Answer 1

[Nagasai Bharat]

Hi,

From my understanding you are trying to get a 2D output from the bivariate data and using the ksdensity function you are getting a vector. The following MATLAB Answer would likely help you achive your objective.

https://www.mathworks.com/matlabcentral/answers/18365-kernel-density-for-2d-data?s_tid=srchtitle

[Hammam Orabi]

Hi,

You are right in your understanding. But the difference is that for my data (Baseband modulated signal) the variables are not independent, that's why I cant generate KSD for each var and multiply their pdfs.

[Nagasai Bharat]

Hi,

There is an entry in the file exchange that does 2-d kernel density esimation:

http://www.mathworks.com/matlabcentral/fileexchange/17204-kernel-density-estimation

You could try this.