Remove elements from string array

What is the simpest way to remove string elements from an array? e.g. arr = [1, 2, 3, "x", "y", 10] would turn into [1,2,3,10]

[Guillaume]

The first issue with your question is that the array [1, 2, 3, "x", "y", 10] cannot exist. You can't mix numbers and strings in a numeric or string array (you could in a cell array but the notation is different). Matlab will automatically convert the numbers to strings in order to create your array:

>>  arr = [1, 2, 3, "x", "y", 10] 
arr = 
  1×6 string array
    "1"    "2"    "3"    "x"    "y"    "10"

[anon]

Yes that is what I had discovered. What do you suppose I do in order to remove the "x" and "y" from the string array?

[Guillaume]

What is the rule that dictates which elements should be removed from the string array?

[anon]

Create a new array that contains only integers. So after removing all non-integers the array would need to be turned into a numeric array e.g. [1,2,3,10]

Answer 1

[Guillaume]

One possible way:

numericarray = double(yourstringarray);  %convert string array to numeric. Text that can't be converted to numeric will end up as NaN.
numericarray = numericarray(mod(numericarray, 1) == 0);  %only keep numbers that are integers. Will also remove NaNs.