extract data from heatmap

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Teva Willemin
Teva Willemin 2020-3-19
评论： Adam Danz 2020-3-19
hello,
i would like to transform my heatmap result into a chart of 763x855
i tried with this line of codes but the result hdata is a 703x854 chart even if i discretized the data from tbl1 (Var 2 and 3 are 0 or positive values)
[Xd,E]=discretize(tbl1.Var2,855); % discretization of X pos
[Yd,E]=discretize(tbl1.Var3,763); % discretization of Y pos
for i=1:11135;
tbl1.Var2(i)=Xd(i)/855; %replacing X pos per discret X
tbl1.Var3(i)=Yd(i)/763; %replacing Y pos per discret Y
end
h=heatmap(tbl1,'Var2','Var3'); %heatmapping eye position
hdata=h.ColorData; %creating a chart from heatmap
hdata is a 703x854 chart, not the one i requested
  4 个评论
显示 2更早的评论
darova
darova 2020-3-19
What about scatter?
scatter(tbl.Var2,tbl.Var3)
Adam Danz
Adam Danz 2020-3-19
How does that image relate to a heatmap?
The dimentions of your heatmap are the same as the dimentions of the input data regardless of how it's discretized. If you want to plot scatter points, heatmap isn't what you want, anyway. As darova said, use plot() or scatter().

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