Using a condition for two string comparison (strcmp)

Hello!

This is my first week using matlab. I was given an assignment in which I have to use strcmp to compare two different columns for two matching elements (for example, if one contains A, the other has to contain A as well, then I know I get a logical 1 in return.). However, I also need a third column to be true, while this logical 1 is bein computed. So I need for when columns "stimulus" and "response" have the same element, that this is only going to be computed as a match if the word 'Sequence' is present in column "condition". I have tried to add for, if and finally while loop... But none work and none retrieve me a logical. My last attempt was this the statement exist that i found online:

S1 = myTable.stimulus

S2 = myTable.response

while exist('myTable.condition', 'var') == 'Sequence'

end

isCorrect = strcmp(S1, S2)

However, it does not work...

I asked the teacher and he keeps challenging me to google for finding the answer. I have not found anything that helps. The problem is that I am not familiar with many commands yet (he only exaplained how to use these statemnets for running loops, which I believe I don't need in this case).

I would appreciate any ideas on how to use strcmp with a condition when a third variable plays an important role over the data selection.

Answer 1

[Voss]

stimulus = {'A'; 'C'; 'A'; 'B'};
response = {'A'; 'C'; 'B'; 'A'};
condition = {'not Sequence'; 'Sequence'; 'Sequence'; 'not Sequence'};
t = table(stimulus,response,condition)

t = 4×3 table
    stimulus    response       condition    
    ________    ________    ________________

     {'A'}       {'A'}      {'not Sequence'}
     {'C'}       {'C'}      {'Sequence'    }
     {'A'}       {'B'}      {'Sequence'    }
     {'B'}       {'A'}      {'not Sequence'}

isCorrect = strcmp(t.stimulus,t.response) & strcmp(t.condition,'Sequence')

isCorrect = 4×1 logical array
   0
   1
   0
   0

[Ana Carolina Vallone Orlandin]

Thank you! I thought that the & command had to be used with two && when i tried that :D

[Voss]

You're welcome!

&& is for scalars only. Since the code here is dealing with vectors (i.e., each column of the table is a vector with multiple elements), we have to use &, and the result is also a vector.