MATLAB MATLAB String Operations and File I/O 2

Question 1

What is the correct way to open a file for writing in MATLAB?

Accepted Answer

fid = fopen('file.txt', 'w')

Answer

fid = open('file.txt', 'write')

Answer

fid = fileopen('file.txt')

Answer

fopen('file.txt')

Question 2

Which MATLAB function replaces occurrences of a substring within a string?

Accepted Answer

strrep

Answer

replace

Answer

sub

Answer

strreplace

Question 3

What does `fprintf(fid, '%d
', x)` do in MATLAB?

Accepted Answer

Writes formatted integer x followed by newline to the file with identifier fid

Answer

Prints x to the screen

Answer

Reads an integer from file fid

Answer

Formats x as a float

Question 4

How do you split a string by a delimiter in MATLAB?

Accepted Answer

strsplit(str, delimiter)

Answer

split(str, delimiter)

Answer

explode(str, delimiter)

Answer

strcut(str, delimiter)

Question 5

Which function converts a string to lowercase in MATLAB?

Accepted Answer

lower

Answer

tolower

Answer

strlower

Answer

lcase

Question 6

What does `xlswrite('data.xlsx', M)` do in MATLAB?

Accepted Answer

Writes matrix M to an Excel file named data.xlsx

Answer

Reads data from data.xlsx into M

Answer

Appends M to an existing Excel sheet

Answer

Converts M to XML format