plot 2 variables of different length

2021 7 4
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更新时间：2021 7 5
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x = 100:400 ;
y = 600:1500 ;
Z = 3*x+2*y ;
I want to plot z (along z axis) as a function of x (along x axis) and y (along y axis).

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 采纳的回答

Image Analyst
Image Analyst 2021-7-4

0 个投票

Try meshgrid():
x = 100:400 ;
y = 600:1500 ;
[X, Y] = meshgrid(x, y);
Z = 3 * X + 2 * Y;
surf(X, Y, Z, 'EdgeColor', 'none');
fontSize = 15;
xlabel('X', 'FontSize', fontSize);
ylabel('Y', 'FontSize', fontSize);
zlabel('Z', 'FontSize', fontSize);
title('Z = 3 * X + 2 * Y', 'FontSize', fontSize);
colormap(jet(256));
colorbar;

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priya
priya 2021-7-4
For the above case, if i need to plot a function,
P=X/Z;
what should be the command?
Image Analyst
Image Analyst 2021-7-4
x = 100:400 ;
y = 600:1500 ;
[X, Y] = meshgrid(x, y);
Z = 3 * X + 2 * Y;
subplot(1, 2, 1);
surf(X, Y, Z, 'EdgeColor', 'none');
fontSize = 15;
xlabel('X', 'FontSize', fontSize);
ylabel('Y', 'FontSize', fontSize);
zlabel('Z', 'FontSize', fontSize);
title('Z = 3 * X + 2 * Y', 'FontSize', fontSize);
colormap(jet(256));
colorbar;
P = X ./ Z;
subplot(1, 2, 2);
imshow(P, [], 'XData', x, 'YData', y);
xlabel('X', 'FontSize', fontSize);
ylabel('Y', 'FontSize', fontSize);
zlabel('Z', 'FontSize', fontSize);
axis('on', 'xy');
title('P = X ./ Z', 'FontSize', fontSize);
colorbar;
impixelinfo;
g = gcf;
g.WindowState = 'maximized'
priya
priya 2021-7-5
In this figure, how can i plot the minimum value of Z on the X axis, for every value of Y?
Image Analyst
Image Analyst 2021-7-5
minYValues = min(Z, [], 2);
minXValues = min(Z, [], 1);
priya
priya 2021-7-5
How to plot minYValues on the surface plot?
Image Analyst
Image Analyst 2021-7-5
I show you the image on the right. Can you show me exactly what you'd expect your surface plot to look like if I did what you are asking?

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