extract data from heatmap

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

[darova]

Can you attach the image you have and the result you want to see?

[Teva Willemin]

Here is the image.

Let me briefly explain what i want. I have a file with some dots than i want plot on the image.

[darova]

What about scatter?

scatter(tbl.Var2,tbl.Var3)

[Adam Danz]

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().