On Friday, February 24, 2012 11:13:53 AM UTC+1, Chappman wrote:
>
> and then using a function which opens up the CSV file and utilizes the
> entires in the matrix P, from the CSV file.
> Is there a method for this?
uhm, i'm not sure if you ask about reading or writing. also, your "d" in
def is uppercase.
reading from this file matrix.csv:
1,2,3
2,2,-1.1
0,0,1
works like this:
sage: import csv
sage: data = list(csv.reader(file("matrix.csv")))
sage: m = matrix([[ float(_) for _ in line] for line in data])
sage: m
[ 1.0 2.0 3.0]
[ 2.0 2.0 -1.1]
[ 0.0 0.0 1.0]
the other way around works like this (i print this, writing to the file is
trivial)
for line in m.rows():
print ','.join((str(_) for _ in line))
gives
1.0,2.0,3.0
2.0,2.0,-1.1
0.0,0.0,1.0
h
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