Blending interpolation for a function
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I need to calculate the value f(x,y)=sin((pi/2)*(x+y)) for the function using the blending interpolation reffering to x0=-1, x1=1, y0=-1, y1=1 in point (1/3,1/3).
Can somebody help me with the code for this? I need to make even a graphics interface but there i can try to do it.....
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Accepted Answer
Image Analyst
on 2 Jun 2020
Try this:
% I need to calculate the value f(x,y)=sin((pi/2)*(x+y))
% for the function using the blending interpolation reffering to
% x0=-1, x1=1, y0=-1, y1=1 in point (1/3,1/3).
x0=-1, x1=1, y0=-1, y1=1;
x = x0 : 1/3 : x1
y = y0 : 1/3 : y1
[X, Y] = meshgrid(x, y);
fxy = sin((pi/2)*(X(:) + Y(:)))
fxy = reshape(fxy, length(y), length(x));
subplot(2, 1, 1);
surf(fxy);
title('surf(fxy)', 'FontSize', 15);
subplot(2, 1, 2);
imshow(fxy, []);
title('imshow(fxy)', 'FontSize', 15);
colormap(jet(256));
colorbar;
5 Comments
Image Analyst
on 3 Jun 2020
As with any variable, you can double click on fxy in the workspace panel and see the numerical values. If you want to see them before you call surf(), you can set a breakpoint on the surf() line and inspect the variable. Of course it doesn't change after surf() is called so it's the same at the very end of the function as it it before you call surf().
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