creating a new matrix without certain rows with elements below a certain value

I want to create a new matrix which is has the same values as my original matrix, M, minus those rows whose first column values are less than 3.

Does anyone know how I could correct my code to do this?

M=set7;

Mm=table2array(M);

N=Mm(Mm(:,1)>=3)

for (Mm(1:end,1)>=3)

B=Mm(:,2)

end

Nn=zeros(size(B,2))

Nn=(N,B);

Thanks!

Answer 1

[Tommy]

If I'm understanding correctly, I believe your third line is enough (with the addition of a colon in the second subscript of M to avoid linear indexing):

idx = M(:,1) >= 3; % indices of rows to keep
N = M(idx,:);

[Em]

Thanks, its working perfectly!

[Tommy]

Happy to help!