How to compare two arrays of strings?

Hi everyone! Currently I'm creating an with Appdesigner and I would like to compare some arrays of strings as follows:

Let's say I have two arrays:

A=['red','purple','blue','green'];

B=['orange','purple','yellow','green'];

I want to compare each element in array 'B' with array 'A'. If the element in B is diferent from A I want to save that element in a new array C and use a counter to count every element that is diferent from A.

This is what I would get after the comparison:

C=['orange','yellow']

counter=2

I hope someone can help. thanks for reading!

[Stephen23]

A=["red","purple","blue","green"];
B=["orange","purple","yellow","green"];
C = setdiff(B,A)

C = 1×2 string array
    "orange"    "yellow"

Answer 1

[David Hill]

Use string arrays instead of character arrays.

A=["red","purple","blue","green"];
B=["orange","purple","yellow","green"];
C=B(~ismember(B,A))

C = 1×2 string array
    "orange"    "yellow"

Look at what a charachter array looks like

A=['red','purple','blue','green']%it is all bunched together, the commas are meaningless

A = 'redpurplebluegreen'

[Luis Angel Manriquez Ramirez]

Thank you very much!