Plot contours from counts of a scatter plot (2024)

Thanks for your help!

I tried something similar to your solution and it kind of works.

Probably I wasn't clear in my question: I want isolines that show me where the red dots are. The ending goal is to do a simulation with around 2000/3000 simulated points and to plot only the isolines, insted of the red dots, over the blu dots (datas)

I tried this code:

i don't understand why i got multiple groups of isolines. Also, a bit of a mistery, if i run the same code on my dekspot Matalb (R2020b) i get a different result. Even more a mystery: the figure is different every time i run it, without changing anything. And I load the same set with the datas and the simulaton points.

Any idea what is happening?

My pleasure!

The contour function automatically chooses several contour levels to draw the contours. To produce only one contour level, set a speciifiic threshold (arbitrarily chosen as ‘[0.01 0.01]’ here) to draw only contours at that level, and I added an argument to outline them with a black solid line. There are only 4 levels iin this example (the result of the unique call), so I chose one that would include all of them greater than 0. Choose the level that gives you the result you want, and the line colour you want. If you want more than one level, for example at 0.5 and 1.5, specify them as [0.5 1.5], and let contour choose the line colours.

The unique function can help you understand what the histcounts2 function is returning.

EDIT — Corrected typographical errors. (At least the ones I saw.)

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