# Reference Matalg¶

## NAME¶

Matalg - # Matalg.py - module for Matrix class.

## CLASSES¶

### builtins.list(builtins.object)¶

Matrix
class Matrix(builtins.list)

“Matrix” creates a (m x n) matrix of float 0.’s

Method resolution order:
Matrix builtins.list builtins.object

Methods defined here:

### Private Methods¶

Private methods should not be accessed from the programs.

__eq__(self, other)
Matrix equality
__getitem__(self, key)
get index value.
__init__(self, m=1, n=1)
Create zero matrix of m = no of rows, n = no of columns.
__invert__(self)
[ ~ ] Matrix inversion).
__mul__(self, other)
Matrix multiplication: [ * ] when both self and other are matrices. When one is a scalar and the other is a matrix, scalar multiplicatin of a matrix.
__pow__(self, other)
[ ** ] Equation solver x = self * rhs ).
__rmul__(self, other)
number * matrix –> matrix
__setitem__(self, key, value)
Set index value.
__str__(self)
Matrix string format for print function.
__sub__(self, other)
Matrix subtraction.

### Public Methods¶

Public mathods are for general use.

return (mat add) = self + other
matbinop(self, other)
matcopy(self)
Creates and returns a copy of the matrix.
matequal(self, other)
Matrices are equal, return True or False.
matinvert(self)
amat.matinvert() –> inverse of amat.
matmult(self, other)
self.matmult(other) –> matrix product self x other.
matprint(self)
Usage: to print amat issue amat.matprint() .
matsub(self, other)
return (mat Subtract) = self - other.
mattranspose(self)
self.mattranspose –> returns transpose (self unchanged).
matunit(self)
Make self the unit matrix (in place).
neatprint(self, prnt=<function printline>, LineLen=5)
prinline = the line printing function. Neatly prints matrix self of size (m x n). Line length variable, default is 5.
scalarmult(self, factor)
Multiply matrix by scalar (in place).
solve(self, other)
other is rhs and is returned as solution. Partial pivoting.
solve_obsolete(self, rhs)
This is an obsolete method that may be useful for debugging; then may be removed.

### Methods inherited from builtins.list:¶

__contains__(...)
x.__contains__(y) <==> y in x
__delitem__(...)
x.__delitem__(y) <==> del x[y]
__ge__(...)
x.__ge__(y) <==> x>=y
__getattribute__(...)
x.__getattribute__(‘name’) <==> x.name
__gt__(...)
x.__gt__(y) <==> x>y
__imul__(...)
x.__imul__(y) <==> x*=y
__iter__(...)
x.__iter__() <==> iter(x)
__le__(...)
x.__le__(y) <==> x<=y
__len__(...)
x.__len__() <==> len(x)
__lt__(...)
x.__lt__(y) <==> x<y
__ne__(...)
x.__ne__(y) <==> x!=y
__repr__(...)
x.__repr__() <==> repr(x)
__reversed__(...)
L.__reversed__() – return a reverse iterator over the list
__sizeof__(...)
L.__sizeof__() – size of L in memory, in bytes
append(...)
L.append(object) – append object to end
count(...)
L.count(value) -> integer – return number of occurrences of value
extend(...)
L.extend(iterable) – extend list by appending elements from the iterable
index(...)
L.index(value, [start, [stop]]) -> integer – return first index of value. Raises ValueError if the value is not present.
insert(...)
L.insert(index, object) – insert object before index
pop(...)
L.pop([index]) -> item – remove and return item at index (default last). Raises IndexError if list is empty or index is out of range.
remove(...)
L.remove(value) – remove first occurrence of value. Raises ValueError if the value is not present.
reverse(...)
L.reverse() – reverse IN PLACE
sort(...)
L.sort(key=None, reverse=False) – stable sort IN PLACE

### Inherited Attributes¶

Data and other attributes inherited from builtins.list:

__new__ = <built-in method __new__ of type object>
T.__new__(S, ...) -> a new object with type S, a subtype of T

## FUNCTIONS¶

enterdata(m, n, datalist, autoprint=True)
datalist –> create matrix and enter data into matrix.
find_max(lst)
Find maximum absolute value of entries in a list, together with its offsetfrom origin.
mkunitmat(m)
m –> make (mxm) unit matrix and print by default.
mkzeromat(m, n, autoprint=False)
m, n –> make (mxn) zero matrix and print by default.
printline(line)
Function to simmulate appending to a plainText widget.
printm(fo, printline, mat, LineLen=5)
This is obsolete - kept as source material only.
printmat(message, mat)
convenience method.

0.0.9

### FILE¶

/dat/work/py3/MatAlg/matalg/Matalg.py