matrix

how I can remove rows from matrix each elements in these rows are equals m=[1 2 3;1 1 1;4 5 8;4 5 8;1 1 1;1 1 1;1 1 1;1 1 1;1 1 1;1 1 1;1 1 1;1 1 1;4 5 8;7 8 5; 47 9 5;7 8 5;5 322 5;7 8 55];

Answer 1

[Andrei Bobrov]

m=[1 2 3;1 1 1;4 5 8;4 5 8;1 1 1;1 1 1;1 1 1;1 1 1;1 1 1;1 1 1;1 1 1;1 1 1;4 5 8;7 8 5; 47 9 5;7 8 5;5 322 5;7 8 55];

variant 1

[a b n] = unique(m,'rows','first');
[id id] = sort(b);
out1 = a(id,:);

variant 2

[a b n] = unique(m,'rows','first');
[id id] = sort(b);
t = accumarray(n,ones(numel(n),1)) == 1;
a2 = a(id,:);
out2 = a2(t(id),:);

[khalil]

Thank you.

The first variant is good solution for me

Answer 2

[Geoff]

m(row, :) = [];

Where row is the row index, or vector of row indices.

Answer 3

[Jan]

I do not understand the question. What does "each element in the rows are equals" mean? Do you want to remove rows, which have have equal elements only? Then:

m = [1 2 3;1 1 1;4 5 8;4 5 8;1 1 1;1 1 1;1 1 1;1 1 1; ...
     1 1 1;1 1 1;1 1 1;1 1 1;4 5 8;7 8 5; 47 9 5; ...
     7 8 5;5 322 5;7 8 55];

m = m(any(diff(m, 1, 2), 2), :);