Adding contour lines to heatmap
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Using a 100X100 matrix, I have genertated this heatmap (attached fig). The deepest shade of red indicates a frequency of 25. And deep blue indicates a frequency of 0.
How will I add a line (a circle) to show encircle the area covers 90% of my data?
I want to compare multiple such figures..so such contour lines will be very useful for me.
Thanks in advance!!
回答（1 个）
KSSV
2020-10-12
0 个投票
Read about contourf.
Or use contour with hold on. You need to specify the level and your desired color.
4 个评论
Ishani Mukherjee
2020-10-12
编辑：Ishani Mukherjee
2020-10-12
KSSV
2020-10-12
Let X, Y, Z be your data matrices.
idx = Z<=1 ;
x = X(idx) ; y = Y(idx) ;
idxb = boundary(x,y) ;
pcolor(X,Y,Z)
shading interp
hold on
plot(x(idxb),y(idxb),'k')
Ishani Mukherjee
2020-10-12
KSSV
2020-10-13
Then what is 100*100 matrix in the question? How can you generate such plot without a matrix?
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2020-10-12
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