Multiple lines in one graph
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Dear All,
I am drawing several lines on one graph and I would like to make them thicker where they coincide. All advice gratefully accepted.
John Hey
采纳的回答
Here is one solution using NaN's to mask out parts of the lines, and plotting them for each thickness. For this to work it is also required to interpolate the data (try it without to see the difference). I don't claim that this is very efficient, but for a small number of lines and nodes it will work.
Xi = [1;2;3;4;5;6];
Yi = [1,2,2,2,1,1;2,2,2,2,3,4;3,3,3,3,3,4;4,3,3,3,4,5;5,5,2,2,4,4].';
plot(Xi,Yi,'LineWidth',3)
hold on
ylim([0,6])
N = numel(Xi);
Xo = interp1(1:N,Xi,1:0.5:N);
Yo = interp1(1:N,Yi,1:0.5:N);
D = bsxfun(@minus,Yo,permute(Yo,[1,3,2]))==0;
D = D(1:end-1,:,:) & D(2:end,:,:);
D = convn(D,[1;1])>0;
S = sum(D,3);
for k = 2:max(S(:))
Yo(S<k) = NaN;
plot(Xo,Yo,'k','LineWidth',k*3)
end
Giving:
You can adjust the colors and line thickness as you see fit. With some effort you could simplify and make it more efficient (e.g. remove columns with all NaN, or use indexing to extract only the non-NaN portions of M and plot only them).
更多回答（1 个）
elham kreem
2018-3-9
0 个投票
let
y = 1:2:40
x1=4:2:43
x2 = 8:3:66
x3 = 1:4:80
figure ;
plot( x1 , y , ' r ' , x2 , y , ' b--o' , x3,y , 'g-*')
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