<upper-matrix> ( object m n -- matrix )
Matrix operations

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Vocabulary
math.matrices

Inputs

object	an object
m	an integer
n	an integer

Outputs

matrix

a matrix

Word description
Make an upper triangular matrix, where all the values below the main diagonal are 0. object will be used as the value for the nonzero part of the matrix, while m and n are used as the dimensions. The inverse of this word is <lower-matrix>. See triangular matrix.

Examples

USING: math.matrices prettyprint ; 1 5 5 <upper-matrix> .
{ { 1 1 1 1 1 } { 0 1 1 1 1 } { 0 0 1 1 1 } { 0 0 0 1 1 } { 0 0 0 0 1 } }

Definition

USING: kernel math.matrices.private ;

IN: math.matrices

: <upper-matrix> ( object m n -- matrix )
    <zero-matrix>
    [ upper-matrix-indices ] [ matrix-set-nths ] [ ] tri ;