How to check multiple values of one variable in if statement

Hi,

I am writing a piece of code that checks for zero columns in a matrix. It stores all zero columns it finds in the value col. I later want to check the values for variable col in different if statements. However, when I write it like this it runs into errors:

%find all columns where there is zero vector

col = find(all(R == 0))

if col == [1 2 3]

//does something

end

This code works fine when col has 3 values, but when it has 4 values like col = 1 2 3 4, it gives the error: Matrix dimensions must agree. Is there another way I could check for multiple col values? Thanks!!

[Kevin Phung]

you have to be more specific, what is the 'something' that you are doing?

Answer 1

[Bob Thompson]

You should just be able to index your if condition.

if col(1:3) == [1 2 3]
    // do something
end

[Faranak Sharifi-Babaki]

Thank you so much!