Visualizing density of points?
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Seyyed Mohammad Saeed Damadi
on 5 Sep 2018
Commented: Seyyed Mohammad Saeed Damadi
on 9 Sep 2018
I have a matrix A with dimension of 288*15581 where 288 is the length of time. Hence, I have 15581 curves. when I plot them I have the picture attached.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/195136/image.jpeg)
The problem is I do not know how many point have been gathered at one specific location. Having A, how can I see the density of points? I think heat map can do it but I have no idea.
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Accepted Answer
jonas
on 5 Sep 2018
You can probably use hist3. See some similar questions here:
Upload some data if you need code.
5 Comments
jonas
on 9 Sep 2018
Edited: jonas
on 9 Sep 2018
Im on phone so cannot try it out myself, but add
hist3(... 'edgecolor', 'none')
to your hist function. You can also try 'interp' instead of 'none'. Second question, try
colormap(flipud(gray))
You could also check out thus link for how to combine hist3 with pcolor
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