Type conversion functions in MATLAB - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the double() function do in MATLAB?

The double() function converts a variable to double-precision floating-point format, which is MATLAB's default numeric type.

beginner

How do you convert a number to an integer type in MATLAB?

You can use functions like int8(), int16(), int32(), or int64() to convert a number to signed integer types of different sizes.

beginner

What is the purpose of the char() function in MATLAB?

The char() function converts numeric values to their corresponding ASCII characters or converts other data types to character arrays.

intermediate

Explain the difference between single() and double() in MATLAB.

single() converts data to single-precision floating-point format, which uses less memory but less precision than double(), which is double-precision and the default numeric type.

intermediate

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

When converting a floating-point number to an integer type, MATLAB rounds the number towards zero (truncates the decimal part) and converts it to the specified integer type.

Which MATLAB function converts a variable to a character array?

A int32()

B double()

C char()

D single()

The char() function converts data to character arrays.

What type does double() convert data into?

A Double-precision floating-point

B Single-precision floating-point

C Integer

D Character

double() converts data to double-precision floating-point format.

If you convert 3.7 to an integer type using int32(), what is the result?

A Error

B 4

C 3.7

D 3

MATLAB truncates the decimal part, so 3.7 becomes 3.

Which function would you use to convert data to single-precision floating-point?

A char()

B single()

C int16()

D double()

single() converts data to single-precision floating-point format.

What happens if you convert a character array to double using double()?

A It converts characters to their ASCII numeric codes

B It causes an error

C It converts characters to integers

D It converts characters to single precision

double() converts characters to their ASCII numeric codes.

Describe how MATLAB converts floating-point numbers to integer types using type conversion functions.

Think about what happens to the decimal part when converting.

Explain the difference between single() and double() conversion functions in MATLAB.

Consider precision and memory usage.