How can I create a joint (2D) histogram of two equally-sized datasets?

I have two datasets with about 2.5 million doubles each. I want to create a 2D histogram to see data density. How can I do this? Bonus points if you can tell me how to change the bin widths as well. Thanks!

Answer 1

[sixwwwwww]

Dear Patrick, maybe the following link is helpful for you:

http://blogs.mathworks.com/videos/2010/01/22/advanced-making-a-2d-or-3d-histogram-to-visualize-data-density/

Good luck!

[Patrick]

I found this link on my own before, but it didn't help because I hit a wall, and OP from that video didn't answer my question about it yet. Thanks anyway.

Answer 2

[Peter Perkins]

Patrick, if you have access to the Statistics Toolbox, you might look at the HIST3 function.

But with that much data, perhaps a traditional histogram is not the way to go. You might look at the smoothhist2d function on the File Exchange.