2D and 3D graphs
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I'm looking for a way to draw the attached data (X,Y,S) as 2D graph with S being the color or as 3D graph that includes (X,Y,S) I have tried the mesh and surf. however, the plot doesn't give much information and the resulted shape is wrong, since the ultimate shape should looks like ( + ). Can anyone please help me with this?
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Jan
2020년 10월 28일
Please make it as easy as possible to answer your question. Post the code you have already, such that the readers do not have to guess, which code is producing, what you think is wrong.
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KSSV
2020년 10월 28일
Try this:
num = xlsread("Test1.xlsx") ;
[r,c] = size(num');
n = r/9;
% Arrange the data
A = permute(reshape(num,[c,r/n,n]),[2,1,3]);
A = permute(A,[2 1 3]) ;
% get x,y,s
x = squeeze(A(:,2,:)) ;
y = squeeze(A(:,3,:)) ;
s = squeeze(A(:,6,:)) ;
% do inteprolation and convert to grid
m = 100 ; n = 100 ;
xi = linspace(min(x(:)),max(x(:)),m) ;
yi = linspace(min(y(:)),max(y(:)),n) ;
[X,Y] = meshgrid(xi,yi) ;
S = griddata(x,y,s,X,Y) ;
% Make exact plus sign
idx = boundary(x(:),y(:)) ;
bx = x(idx) ; by = y(idx) ;
idx = inpolygon(X,Y,bx,by) ;
S(~idx) = NaN ;
% plot
pcolor(X,Y,S)
shading interp
colorbar
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KSSV
2020년 10월 29일
Read about caxis. You can limit the color values here.....but it will effect the complete plot.
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