Using the surf and meshgrid command

i am trying to plot a function using the surf and meshgrid commands

use the meshgrid and surf commands to plot y = sin(x cos(z)))

this is the code i have so far im not sure how to continue using the surf command and what is wrong with my current code

x = linspace(-1,1);
y = linspace(-1,1);
[x,y] = meshgrid(x,y);
y = sin*(x cos(z))

Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses.

Answer 1

[Star Strider]

I am not certain what function you want to plot, since you did not create ‘z’ as a separate matrix. (I am creating it here in place of matrix ‘y’.

Since this is a bit ambiguous, two options —

x = linspace(-1,1, 50);
z = linspace(-1,1, 50);
[x,z] = meshgrid(x,z);
y = sin(x.*cos(z));

figure
surf(x, y, z)
colormap(turbo)

figure
surf(x, z, y)
colormap(turbo)

.

[lateef]

y = sin(x cos(z)) is the only function i want to plot per my instructor im supposed to use the meshgrid and surf commands

[Matt J]

@lateef Well, you've had quite a few homework hints, so perhaps you should carry the ball from here...

[Star Strider]

@lateef — This should work, then.

I am just not certain what is to be plotted, or how it is to be plotted, since ‘z’ is not specifically defined anywhere.

Answer 2

[Catalytic]

Use fimplicit3 instead

fimplicit3(@(x,y,z) y - sin(x.* cos(z))  ,[-1,1]   )

[lateef]

per my instructor i am supoosed to use the surf and meshgrid commands