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There are a number of functions available for checking to see if the elements of a matrix meet some condition, and for rearranging the elements of a matrix. For example, Octave can easily tell you if all the elements of a matrix are finite, or are less than some specified value. Octave can also rotate the elements, extract the upper- or lower-triangular parts, or sort the columns of a matrix.

• Finding Elements and Checking Conditions: | ||

• Rearranging Matrices: | ||

• Special Utility Matrices: | ||

• Famous Matrices: |