How to make a heatmap with density of points

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Ángel González
Ángel González 2018-8-22
评论： Walter Roberson 2020-9-14
Hello!
I have two vectors ( x_vector and y_vector) which correspond with the different points obtained on my simulation. The point is that I want to make a kind of heatmap with the density of the repetition of those points. I have tried with different functions such as imagesc or histogram2, but I didn't get to achieve what I wanted.
Thank you.

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jonas
jonas 2018-8-22
编辑：jonas 2018-8-22
  14 个评论
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Ángel González
Ángel González 2018-8-30
Ahhhhh okey okey, I didn't know that min(C{2}) meant C{2}(1). I supposed that it would return the minimum value of that array.
Thank you!!
jonas
jonas 2018-8-30
编辑：jonas 2018-8-30
Well you were not incorrect, min(C{2}) does not always equal C{2}(1). However, in this specific case C{2}(1) is the minimum value of C{2}. It works both ways.
Sorry for the confusing code ;)

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更多回答（1 个）

Walter Roberson
Walter Roberson 2018-8-22
  2 个评论
Michael King
Michael King 2020-9-14
Great answer to this question! I'd like to ask a follow up question. Can a number be extracted to indicate the extent of density in a data set? i.e. how focused is a heatmap?
Walter Roberson
Walter Roberson 2020-9-14
If you use Malcolm's contribution, then his dataDensity() function calculates those numbers.

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