Converting between types in MATLAB - Cheat Sheet & Quick Revision

Recall & Review

beginner

What function converts a number to a string in MATLAB?

The num2str() function converts a number to a string in MATLAB.

beginner

How do you convert a string to a number in MATLAB?

Use the str2double() function to convert a string to a number in MATLAB.

intermediate

What does the int8() function do in MATLAB?

The int8() function converts a value to an 8-bit signed integer type.

beginner

How can you convert a logical value to a double in MATLAB?

Use the double() function to convert a logical value (true/false) to 1 or 0 as a double.

intermediate

What happens if you convert a floating-point number to an integer type in MATLAB?

MATLAB rounds the value to the nearest integer when converting a floating-point number to an integer type.

Which MATLAB function converts a string '123.45' to a numeric value?

A double('123.45')

B num2str('123.45')

C int8('123.45')

D str2double('123.45')

The str2double() function converts a string to a numeric double value.

What is the result of int8(3.9) in MATLAB?

A 4

B 3

C 3.9

D Error

MATLAB rounds the value, so int8(3.9) becomes 4.

Which function converts a logical true to a double 1 in MATLAB?

A double()

B logical()

C int8()

D num2str()

The double() function converts logical true to numeric 1.

What does num2str(100) return?

A Error

B 100 as a number

C 100 as a string

D Logical true

num2str() converts numbers to their string representation.

Which function would you use to convert a numeric array to 16-bit integers?

A num2str()

B int16()

C double()

D str2double()

int16() converts values to 16-bit signed integers.

Explain how to convert between strings and numbers in MATLAB.

Think about functions that change numbers to text and text to numbers.

Describe what happens when converting floating-point numbers to integer types in MATLAB.

Focus on how MATLAB handles the decimal part during conversion.