How do I write an If() AND() function in MATLAB?

Hi,

I was wondering what the best way to write an IF() AND() function is. For example if I have the following information, I want to select the values in row 3 associated with the values that have 11 in column1 and have a 1 in column2. How do I write the code to do this?

column1  column2  column 3  column 4
11          1        6        5
11          1        8        2
12          1        7        0
21          1        3        8
21          1        2        9

Answer 1

[Star Strider]

This works:

M = [11          1        6        5
    11          1        8        2
    12          1        7        0
    21          1        3        8
    21          1        2        9];

Out = M((M(:,1) == 11) & (M(:,2) == 1),3)

Out =
     6
     8

[Julie]

THANKS! Would this also work for a variable? So for example if the previous matrix is an excel sheet I loaded to matlab and then said x = colum1 + 5. Then I wanted to select the values in x that were associated with 11 in column1 and had a 1 in column2?

[Star Strider]

My pleasure!

Yes it would. In fact, here ‘M’ is a variable, so if I understand you correctly, you would just substitute ‘x’ for ‘M’ to make my code compatible with your variables.