Heatmap of 2D plot

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meghna roy chowdhury
评论： KSSV 2020-5-26
I have 5 seconds data of a continuous signal of frequency 512 Hz. I need to get a heatmap of this .
I have refered this https://stackoverflow.com/questions/23356219/plotting-many-lines-as-a-heatmap. I need a similiar plot with my data. Can I get some help with the code please.
I've attached the data as a .mat file.
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meghna roy chowdhury
meghna roy chowdhury 2020-5-21
Hi, I've attached the .mat file
KSSV
KSSV 2020-5-21
I have answered t..hope it is useful.

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KSSV
KSSV 2020-5-21
编辑：KSSV 2020-5-21
t=[1/512:1/512:5]';
z = zeros(size(t));
col = amp; % This is the color, vary with amp in this case.
surface([t t],[amp amp],[z z],[col col],...
'facecol','no',...
'edgecol','interp',...
'linew',2);
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meghna roy chowdhury
meghna roy chowdhury 2020-5-26
编辑：meghna roy chowdhury 2020-5-26
Thank you. This is very helpful.
Is there any difference between colormap and heatmap?
Apologies again, for missing this comment
KSSV
KSSV 2020-5-26
heatmap is a 2D spread of certain value. colormap is a color pallet used to show such a spread. There are direct functions for this read about heatmap and colormap.

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