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

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Patrick
Patrick 2013-10-31
回答： Peter Perkins 2013-11-6
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!

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sixwwwwww
sixwwwwww 2013-10-31
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Patrick
Patrick 2013-11-5
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.

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Peter Perkins
Peter Perkins 2013-11-6
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.

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