Create a heatmap from x and y values

Question

Douwe Horsthuis 2022-8-29

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1790210-create-a-heatmap-from-x-and-y-values

编辑： Douwe Horsthuis 2022-8-29

Good morning,

I was hoping that someone could help me with this, I want to turn x and y coordinates into a heatmap:

I have a matrix edf_n, with edf_n.x and edf_n.y where these both have 530934 values that correspont to eye tracking data and where a participant was looking on the screen. I can plot this using a scatterplot: scatter(edf_n.x, edf_n.y) which looks like this:

However, what I want is to instead have a heatmap, instead.

Thank you very much!

Douwe

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Answer 1

David Hill 2022-8-29

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1790210-create-a-heatmap-from-x-and-y-values#answer_1037280

在 MATLAB Online 中打开

t=table(edf_n.x,edf_n.y);
heatmap(t,'Var1','Var2');

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Image Analyst 2022-8-29

You keep foregetting to attach your data, leading me to think you've never read the posting guidelines.

If you have any more questions, then attach your data and code to read it in with the paperclip icon after you read this:

TUTORIAL: How to ask a question (on Answers) and get a fast answer

Douwe Horsthuis 2022-8-29

编辑：Douwe Horsthuis 2022-8-29

edf_n.mat

sorry about that, I had hopes that it would have worked without attaching the data. But I've attached it here. It my first time posting here, but for the rest I don't think I am missing/abusing any of the guidlines, or am I?

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