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

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 ?

[Vingt100]

Actually the returned matrix will note necessary be square. It will have (ymax-ymin) rows and (xmax-xmin) columns

[Rik]

Can you give an example of plausible input data? Do you have a function or paired x-y data?

[Vingt100]

My x data is x = 0:0.01:pi and my ydata is the function for example y = sin(x) + cos(x)

[J. Alex Lee]

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

[Vingt100]

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

Answer 1

[Stephan]

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)