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

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Julie
Julie 2016-1-27
评论： Star Strider 2016-1-27
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

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Star Strider
Star Strider 2016-1-27
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
  2 个评论
Julie
Julie 2016-1-27
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
Star Strider 2016-1-27
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.

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