deleting a full colum using

I have a matrix with several optionprice data. Now I am trying to delete rows based on a for loop and if criteria. if the value of column 8 is >1.1 or <0.9, the whole row should be deletet. I have used the following code, but I always get an error message:

for i=1:numel(matrix)

    if(matrix(i,8)>1.1)

        matrix(i,:) = [];
    end

end

why does that no work and what ways are there to delete those rows? the matrix is a double matrix

[Jan]

Please post the error message whenever you explain, that there is an error.

Answer 1

[Jan]

numel(matrix) is the number of all elements. When you have deleted some rows already, the matrix has less elements and matrix(i,8) might be not existing anymore already.

You do not need a loop, to solve this problem:

matrix(matrix(:, 8) > 1.1, :) = []

Answer 2

[Locks]

thanks!

[Sven]

Sven, you're giving me a bad name... please hit the "Accept Answer" button when an answer solves your problem.

(but feel free to say thanks in a comment (like this one) rather than making a new answer)

[Azzi Abdelmalek]

Sven, if the answer helped, click on accept this answer. Also, to add a comment, click on comment on this answer just under the answer.