Colormap and colorbar in MATLAB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a colormap with 64 colors.

MATLAB

cmap = [1](64);

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

Aaxis

Bplot

Cjet

Dfigure

Attempts:

3 left

💡 Hint

Common Mistakes

Using plotting functions instead of colormap functions.

Confusing figure or axis commands with colormap.

The jet function creates a colormap with a specified number of colors.

2fill in blank

medium

Complete the code to add a colorbar to the current figure.

MATLAB

[1];

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

Acolorbar

Bcolormap(jet)

Caxis equal

Dhold on

Attempts:

3 left

💡 Hint

Common Mistakes

Using colormap instead of colorbar.

Trying to set axis properties instead of adding colorbar.

The colorbar function adds a color scale bar to the figure.

3fill in blank

hard

Fix the error in the code to apply the 'hot' colormap and show the colorbar.

MATLAB

imagesc(peaks(20))
[1]('hot')
colorbar;

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

Acolormap

Bcolorbar

Ccaxis

Daxis

Attempts:

3 left

💡 Hint

Common Mistakes

Using colorbar instead of colormap.

Trying to use axis or caxis incorrectly.

The colormap function sets the colormap for the current figure.

4fill in blank

hard

Fill both blanks to create a figure with a 'parula' colormap and add a colorbar.

MATLAB

imagesc(magic(10))
[1]([2])
colorbar;

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

Acolormap

Bparula

Cjet

Dcolorbar

Attempts:

3 left

💡 Hint

Common Mistakes

Using colorbar as the colormap function.

Confusing colormap names.

Use colormap to set the colormap and parula as the colormap name.

5fill in blank

hard

Fill all three blanks to create a heatmap with a 'cool' colormap, set color limits, and add a colorbar.

MATLAB

data = rand(5);
imagesc(data)
[1]([2])
caxis([3])
colorbar;

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

Acolormap

Bcool

C[0 1]

Djet

Attempts:

3 left

💡 Hint

Common Mistakes

Using colorbar instead of colormap.

Incorrect color limits format.

Set the colormap to 'cool' using colormap, then set color limits with caxis to [0 1].