MATLAB: Compare string array columns for equality then display all non-equal rows

equalityMATLABstrcmp

Hello, I have 2 column string array data formatted like this:
x = ["1","2 2 0"; "2", "2 1 1"; "3", "1 1 0"; "4", "1 1 1"]
>>
    "1"    "2 2 0"
    "2"    "2 1 1"
    "3"    "1 1 0"
    "4"    "1 1 1"
y = ["1","x x x"; "2", "2 1 1"; "3", "1 1 0"; "4", "x x x"]
>>  
    "1"    "x x x"
    "2"    "2 1 1"
    "3"    "1 1 0"
    "4"    "x x x"
I want to compare the second column for equality then display the entire rows that are different. So, first get the logical:
idx = x == y
>> 
   1   0
   1   1
   1   1
   1   0
Now I am struggling to index back in (e.g. y(idx)) and display the non matching results like this for y:
"1"    "x x x"
"4"    "x x x"
and related:
for x
        "1"    "2 2 0"
        "4"    "1 1 1"
I'm only able to return a vertical 4 x 1 instead of 2 x 2. Thanks!

Best Answer

>> y(x(:,2)~=y(:,2),:)
ans = 
  2×2 string array
    "1"    "x x x"
    "4"    "x x x"
>>
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