Upper Triangular The upper triangular portion of a matrix includes the main diagonal and all elements above it. The shaded elements in this graphic depict the upper triangular portion of a 6-by-6 matrix.

Aug 20, 2013 · I have an upper triangular matrix (without the diagonal) given by: M = [0 3 2 2 0 0; 0 0 8 6 3 2; 0 0 0 3 2 1; 0 0 0 0 2 1; 0 0 0 0 0 0] The resulting matrix should look like this:

Use the triu function to produce upper triangular matrices for which istriu returns logical 1 (true). The functions isdiag, istriu, and istril are special cases of the function isbanded, which can perform all of the same tests with suitably defined upper and lower bandwidths. For example, istriu(A) == isbanded(A,0,size(A,2)).

Apr 9, 2017 · I want to get the upper triangle from a matrix. MATLAB have the functions tril and triu, unfortunately they give the wrong triangle. I'm looking for following triangle, is there a command for it or must it be a loop? If so, how does it look? You need to do it manually. There are several approaches: Any of the above gives. 8 1 6.

Apr 18, 2017 · I would like to reshape C to form an upper triangular array M with size(M) = 8x8. Each cell of M above the diagonal should contain the original 10x10 matrix. Any suggestion is appreciated.

How to get upper triangular elements as vector?

triu(A,k) returns a matrix that retains the elements of A on and above the k -th diagonal. The elements below the k -th diagonal equal to zero. The values k = 0, k > 0, and k < 0 correspond to the main, superdiagonals, and subdiagonals, respectively. Input, specified as a numeric or symbolic matrix.

Jun 8, 2010 · Now i do like to obtain a vector with only the values of the upper triangular matrix. in other words a vector of underneath form.

I am trying to create a triangular matrix from a row vector using loops. I know there are built-in commands that makes this easy, but I am a beginner programmer and I want to test this out. Here is what I've got so far.

To extract the upper triangular matrix from a matrix in Matlab and Octave, use the function triu () The M parameter is a matrix (array). The triu () function outputs an upper triangular matrix. What is an upper triangular matrix? It is a matrix in which all values under the main diagonal are null.