MATLAB Programming Fundamentals - MathWorks

if (str == "")

disp 'str has zero characters'

end

str has zero characters

Do not use the isempty function to test for empty strings. A string with zero characters

still has a size of 1-by-1. However, you can test if a string array has at least one dimension

with a size of zero using the isempty function.

Create an empty string array using the strings function. To be an empty array, at least

one dimension must have a size of zero.

str = strings(0,3)

str =

0x3 empty string array

Test str using the isempty function.

isempty(str)

ans = logical

1

Test a string array for empty strings. The == operator returns a logical array that is the

same size as the string array.

str = ["Mercury","","Apollo"]

str = 1x3 string array

"Mercury" "" "Apollo"

str == ''

ans = 1x3 logical array

0 1 0

6 Characters and Strings