Multiplying two columns in a matrix

Hi

I have loaded a text file into a matrix using dlmread function. this has 17 columns.. and now i want to add another column that is the multyplication of the 17th column and the 15th column. how do I do so?

thank you!!

Answer 1

[Walter Roberson]

YourArray(:,end+1) = YourData(:,15) .* YourData(:,17);

[itzhak mal]

When I used dlm read it went into a matrix you named here "YourArray" right? So what's the difference between the "YourData" and the matrix? How do I solve this?

Thank you so much!!

[Walter Roberson]

TheNameOfYourArrayGoesRightHere(:,end+1) = TheNameOfYourArrayGoesRightHere(:,15) .* TheNameOfYourArrayGoesRightHere(:,17);