Convert two vectors (x and y) to a square matrix ?

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Vingt100 2020-3-24

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https://ww2.mathworks.cn/matlabcentral/answers/512622-convert-two-vectors-x-and-y-to-a-square-matrix

编辑： Stephan 2020-3-24

So here is my problem.

I have two vectors that descibe a plot (a sinusiodal function) and I want to have the discretized matrix of this plot. It means that I want to have a 1 on the curve and 0 everywhere else.

Is this possible ?

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J. Alex Lee 2020-3-24

do you want a pixel map (image) of the plot?

Vingt100 2020-3-24

编辑：Vingt100 2020-3-24

Yes i'd like to transform my plot into an image.

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采纳的回答

Stephan 2020-3-24

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/512622-convert-two-vectors-x-and-y-to-a-square-matrix#answer_421710

编辑：Stephan 2020-3-24

在 MATLAB Online 中打开

x = 0:0.01:6.28;
y = sin(x);
M = ones(size(x,2));
x_int = 1:size(x,2);
y_int = ceil(y * size(y,2)/(abs(min(y))+abs(max(y))) +...
    size(y,2)/(abs(min(y))+abs(max(y))));
y_int(y_int>size(M,2)) = y_int(y_int>size(M,2))-1;
for k = 1:size(y,2)
    M(y_int(k),x_int(k)) = 0;
end
imshow(M)