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Fill area inside 4 connected lines in a plot

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Stefan Lang
Stefan Lang 2020-10-2
评论： Stefan Lang 2020-10-12
I have a figure, similar to a rectangle. It consists of 4 lines. Top and bottom line is just a connection of the two bottom points, respectively two top points. But left and right line is a matrix with x and y values, resulting from a curve fit between the left top and bottom point, same for the right side. Now i want a matrix to be filled with zeros outside of the rectangles coordinates and with ones inside the rectangle (see picture below).

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KSSV
KSSV 2020-10-5
Read about padzeros, padarrays.
A = ones(5,4) ;
iwant = zeros(8) ;
iwant(3:7,3:6) = A ;
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KSSV
KSSV 2020-10-5
[X,Y] = meshgrid(1:10,1:10) ;
[Xi,Yi] = meshgrid(linspace(1.5,9.5,9)) ;
plot(X,Y,'r',X',Y','r')
val = [1:numel(Xi)]' ;
text(Xi(:),Yi(:),num2str(val))
Stefan Lang
Stefan Lang 2020-10-12
I found the poly2mask(). That does exactly what i need. But thanks anyways.

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