Plotting 3D functions
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Spaceman
le 19 Mar 2024
Commenté : Spaceman
le 8 Avr 2024 à 2:52
Given: Create both a contour and surface plot for the following function.
Find:
- Create an x vector between -2 and 2, with a step size of .2
- Create a y vector between -2 and 2, with a step size of .2
- Create a matrix X and Y that contains a grid of coordinate pairs from x and y
- Create a matrix Z that is the same size as X and Y
Create the following plots, with labels
- Contour plot
- Surface plot
Issue: I have what I believe to be the correct code, however, it's giving me an error stating not enough input arguments...
My Solution: What am I missing here?
x=-2:0.2:2
y=x
[X,Y]=meshgrid(x,y)
Z=x.*exp.^-(x.^2+y.^2)
contour(X,Y,Z)
surf(X,Y,Z)
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the cyclist
le 19 Mar 2024
Modifié(e) : the cyclist
le 19 Mar 2024
You used exp as if it were a constant (e) that is raised to a power. Instead, you should have used it as a function.
You also used x and y instead of X and Y, when calculating Z.
x=-2:0.2:2;
y=x;
[X,Y]=meshgrid(x,y);
Z=X.*exp(-(X.^2+Y.^2));
figure
contour(X,Y,Z)
figure
surf(X,Y,Z)
3 commentaires
the cyclist
le 21 Mar 2024
If you don't use parentheses, you are relying on the defined operator precedence. Sometimes, parentheses are better, just for clarity.
Semicolons suppress command window output, not all output. A semicolon such as
surf(X,Y,Z);
is superfluous.
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