Sage Reference Manual: Matrices and Spaces of Matrices - Mirrors

Sage Reference Manual: Matrices and Spaces of Matrices, Release 6.1.1
•zero - string (default: None); if not None use the value of zero as the representation of the zero
element.
•plus_one - string (default: None); if not None use the value of plus_one as the representation
of the one element.
•minus_one - string (default: None); if not None use the value of minus_one as the representation
of the negative of the one element.
EXAMPLES:
sage: R = PolynomialRing(QQ,6,’z’)
sage: a = matrix(2,3, R.gens())
sage: a.__repr__()
’[z0 z1 z2]\n[z3 z4 z5]’
sage: M = matrix([[1,0],[2,-1]])
sage: M.str()
’[ 1 0]\n[ 2 -1]’
sage: M.str(plus_one=’+’,minus_one=’-’,zero=’.’)
’[+ .]\n[2 -]’
sage: M.str({1:"not this one",2:"II"},minus_one="*",plus_one="I")
’[ I 0]\n[II *]’
sage: def print_entry(x):
... if x>0:
... return ’+’
... elif x