Bar and histogram plots in MATLAB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a simple bar plot of the data vector.

MATLAB

data = [5, 10, 15, 20];
bar([1]);

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Aplot

Bhistogram

Cdata

Dscatter

Attempts:

3 left

💡 Hint

Common Mistakes

Using plot instead of bar function input.

Using histogram function inside bar function.

Passing a function name instead of data.

The bar function in MATLAB takes the data vector as input to create a bar plot.

2fill in blank

medium

Complete the code to create a histogram with 10 bins for the data vector.

MATLAB

data = randn(100,1);
histogram(data, [1]);

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A10

B5

C20

D50

Attempts:

3 left

💡 Hint

Common Mistakes

Using too few or too many bins causing unclear histogram.

Passing a vector instead of a scalar for bins.

The second argument to histogram specifies the number of bins. Here, 10 bins are requested.

3fill in blank

hard

Fix the error in the code to correctly plot a bar chart with categories.

MATLAB

categories = {'A', 'B', 'C'};
values = [10, 20, 15];
bar(categorical([1]), values);

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Avalues'

Bvalues

C1:3

Dcategories

Attempts:

3 left

💡 Hint

Common Mistakes

Using a numeric vector like 1:3, which results in default numeric labels.

Using values as the x-axis input.

The bar function accepts a categorical array as the first input to set the x-axis labels to those categories (A, B, C).

4fill in blank

hard

Fill both blanks to create a histogram with 15 bins and set the face color to red.

MATLAB

data = randn(200,1);
h = histogram(data, [1]);
h.FaceColor = [2];

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A15

B10

C'red'

D'blue'

Attempts:

3 left

💡 Hint

Common Mistakes

Using color without quotes.

Setting bins to a wrong number.

The first blank sets the number of bins to 15. The second blank sets the bar color to red using a string.

5fill in blank

hard

Fill all three blanks to create a bar plot with custom x labels and set the bar color to green.

MATLAB

values = [3, 7, 5];
categories = {'X', 'Y', 'Z'};
bar(1:3, values, 'FaceColor', [1]);
set(gca, 'XTickLabel', [2]);
title([3]);

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A'red'

B'green'

Ccategories

D'My Bar Plot'

Attempts:

3 left

💡 Hint

Common Mistakes

Using color without quotes.

Passing numeric vector instead of cell array for XTickLabel.

Forgetting quotes around title string.

The bar color is set to green with 'green'. The x-axis labels are set to the categories cell array. The plot title is set with a string.