MAT file save and load in MATLAB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to save variable x to a MAT file named 'data.mat'.

MATLAB

x = 10;
save('[1]', 'x');

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

Adata.mat

Bfile.txt

Coutput.csv

Dimage.png

Attempts:

3 left

💡 Hint

Common Mistakes

Using a filename without .mat extension

Saving to a text or image file instead of MAT file

The save function saves variables to a MAT file. The filename must end with .mat.

2fill in blank

medium

Complete the code to load the variable x from the MAT file 'data.mat'.

MATLAB

load('[1]', 'x');

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

Afile.txt

Bdata.mat

Cimage.png

Doutput.csv

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to load from a non-MAT file

Using a wrong filename

The load function loads variables from a MAT file. You must specify the correct MAT filename.

3fill in blank

hard

Fix the error in the code to save variables a and b to 'myfile.mat'.

MATLAB

a = 5;
b = 7;
save('myfile.mat', [1]);

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

A'a', 'b'

B'a b'

C'a, b'

D'a',b

Attempts:

3 left

💡 Hint

Common Mistakes

Putting variable names in one string separated by commas or spaces

Missing quotes around variable names

To save multiple variables, list them as separate strings in the save function.

4fill in blank

hard

Fill both blanks to save variable y and load it back from 'file.mat'.

MATLAB

y = [1, 2, 3];
save('[1]', 'y');
clear y
load('[2]', 'y');

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

Afile.mat

Bdata.mat

Cmydata.mat

Doutput.mat

Attempts:

3 left

💡 Hint

Common Mistakes

Using different filenames for save and load

Forgetting to clear the variable before loading

Use the same filename to save and load the variable y.

5fill in blank

hard

Fill all three blanks to save variable z, clear it, and then load it back from 'test.mat'.

MATLAB

z = magic(3);
save('[1]', '[2]');
clear [3];
load('test.mat', 'z');

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

Atest.mat

Bz

Da

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong filename in save

Not clearing the correct variable

Saving variable name without quotes

Save to 'test.mat', save variable 'z', clear variable 'z' before loading it back.