mesh and surf for surfaces in MATLAB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a grid of points using meshgrid.

MATLAB

x = -2:0.5:2;
y = -2:0.5:2;
[X, Y] = [1](x, y);

Drag options to blanks, or click blank then click option'

Ameshgrid

Bplot

Clinspace

Dsurf

Attempts:

3 left

💡 Hint

Common Mistakes

Using linspace instead of meshgrid.

Trying to use plot to create coordinate matrices.

The meshgrid function creates matrices for X and Y coordinates from vectors x and y, which is needed for 3D surface plotting.

2fill in blank

medium

Complete the code to calculate Z as the sum of squares of X and Y.

MATLAB

Z = [1].^2 + Y.^2;

Drag options to blanks, or click blank then click option'

AY

BX

CZ

Dx

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase x instead of matrix X.

Forgetting the dot before the power operator.

We use X squared plus Y squared to get the surface height Z.

3fill in blank

hard

Fix the error in the code to plot the surface using surf.

MATLAB

surf(X, Y, [1]);

Drag options to blanks, or click blank then click option'

AZ

Bplot

CY

Dx

Attempts:

3 left

💡 Hint

Common Mistakes

Passing x or y instead of Z to surf.

Trying to use plot instead of surf.

The surf function needs the Z matrix for heights, so we pass Z.

4fill in blank

hard

Fill both blanks to create a mesh plot and label the axes.

MATLAB

mesh(X, Y, Z);
xlabel('[1]');
ylabel('[2]');

Drag options to blanks, or click blank then click option'

AX-axis

BY-axis

CZ-axis

DSurface

Attempts:

3 left

💡 Hint

Common Mistakes

Labeling axes incorrectly or swapping labels.

Using 'Z-axis' label for x or y axis.

We label the x-axis as 'X-axis' and the y-axis as 'Y-axis' to describe the plot clearly.

5fill in blank

hard

Fill all three blanks to create a surface plot with title and color bar.

MATLAB

surf(X, Y, Z);
title('[1]');
colorbar;
shading [2];
view([3]);

Drag options to blanks, or click blank then click option'

A3D Surface Plot

Binterp

C[45 30]

Dflat

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'flat' shading which is less smooth.

Not setting a proper view angle for 3D visualization.

The title describes the plot, 'interp' smooths colors, and view sets the angle to [45 30].