diagonal

Version 1.0.0.0 (285 Bytes) by Miguel D. B.
Returns a vector with the main diagonal of a matrix. Similar to the built-in function diag
1.0
(2)
1.1K Downloads
Updated 14 Mar 2006

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This file contians a function named "diagonal01" which isolates in a row vector the diagonal of a matrix (square or not), whitout using a loop. It is similar to the Matlab built-in function "diag" when used with one input argument.
For example, the instructions
» A=magic(4); A(end,:)=[], B=diagonal01(A)

Produce

A =
16 2 3 13
5 11 10 8
9 7 6 12
B =
16 11 6

Cite As

Miguel D. B. (2026). diagonal (https://www.mathworks.com/matlabcentral/fileexchange/10324-diagonal), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R11
Compatible with any release
Platform Compatibility
Windows macOS Linux
Categories
Find more on Operating on Diagonal Matrices in Help Center and MATLAB Answers
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Version Published Release Notes
1.0.0.0