src/Malenki/Math/Matrix.php
public function isDiagonal()
    {
        $int_size = min((array) $this->size);

        if($int_size > 0){
            for($i = 0; $i < $int_size; $i++){
                $arr_row = $this->getRow($i);

                if($arr_row[$i] != 0){
                    unset($arr_row[$i]);

                    foreach($arr_row as $v){
                        if($v != 0){
                            return false;
                        }
                    }

                } else {
                    return false;
                }
            }

            return true;
        }

        return false;
    }
public function isDiagonal()
    {
        $int_size = min((array) $this->size);

        if($int_size > 0){
            for($i = 0; $i < $int_size; $i++){
                $arr_row = $this->getRow($i);

                if($arr_row[$i] != 0){
                    unset($arr_row[$i]);

                    foreach($arr_row as $v){
                        if($v != 0){
                            return false;
                        }
                    }

                } else {
                    return false;
                }
            }

            return true;
        }

        return false;
    }
public function isDiagonal ( ) { $ int_size = min ( ( array ) $ this -> size ) ; if ( $ int_size > 0 ) { for ( $ i = 0 ; $ i < $ int_size ; $ i ++ ) { $ arr_row = $ this -> getRow ( $ i ) ; if ( $ arr_row [ $ i ] != 0 ) { unset ( $ arr_row [ $ i ] ) ; foreach ( $ arr_row as $ v ) { if ( $ v != 0 ) { return false ; } } } else { return false ; } } return true ; } return false ; }
Tests whether the current matrix is diagonal or not.

@access public
@return boolean
Tests whether the current matrix is diagonal or not .