Finding the index of a string within an array of strings

I have an array composed of strings '0' 'P' 'E' and 'M' I am trying to find the index of the string 'P' within the array but the current lines I am using

staPlaLoc = find(maGen == 'P');

(wherein staPlaLoc is the index of 'P' within the array maGen) returns the following

Error using subsindex Function 'subsindex' is not defined for values of class 'string'.

[ajay kumar]

Maybe you can use this

if your index is found you will get index number otherwise empty array

arr = ["a" "b" "c" "d"];
index = find(ismember(arr,"a"))

index = 1

index = find(ismember(arr,"z"))

index =

  1×0 empty double row vector

Answer 1

[Bruno Luong]

May be this is what you want?

find(strcmp({'0' 'P' 'E' 'M'},'P'))

[Micah Boarts]

Thanks this worked I think,