Roy Smith wrote:
> In article <add22437-64a4-4dfb-b6d9-28832e769...@googlegroups.com>,
> Sudheer Joseph <sjo.in...@gmail.com> wrote:
>
>> Dear members,
>> I need to print few arrays in a tabular form for example
>> below array IL has 25 elements, is there an easy way to print
>> this as 5x5 comma separated table? in python
>>
>> IL=[]
>> for i in np.arange(1,bno+1):
>> IL.append(i)
>> print(IL)
>> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
>> in fortran I could do it as below
>> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
>> integer matrix(5,5)
>> in=0
>> do, k=1,5
>> do, l=1,5
>> in=in+1
>> matrix(k,l)=in
>> enddo
>> enddo
>> m=5
>> n=5
>> do, i=1,m
>> write(*,"(5i5)") ( matrix(i,j), j=1,n )
>> enddo
>> end
>>
>
> Excellent. My kind of programming language! See
> http://www.python.org/doc/humor/#bad-habits.
>
> Anyway, that translates, more or less, as follows.
>
> Note that I'm modeling the Fortran 2-dimensional array as a dictionary
> keyed by (k, l) tuples. That's easy an convenient, but conceptually a
> poor fit and not terribly efficient. If efficiency is an issue (i.e.
> much larger values of (k, l), you probably want to be looking at numpy.
>
> Also, "in" is a keyword in python, so I changed that to "value".
> There's probably cleaner ways to do this. I did a pretty literal
> transliteration.
>
>
> matrix = {}
> value = 0
> for k in range(1, 6):
> for l in range(1, 6):
> value += 1
> matrix[(k, l)] = value
>
> for i in range(1, 6):
> print ",".join("%5d" % matrix[(i, j)] for j in range(1, 6))
>
> This prints:
>
> 1, 2, 3, 4, 5
> 6, 7, 8, 9, 10
> 11, 12, 13, 14, 15
> 16, 17, 18, 19, 20
> 21, 22, 23, 24, 25
Or, as the OP may be on the road to numpy anyway:
>>> import numpy
>>> a = numpy.arange(1, 26).reshape(5, 5)
>>> a
array([[ 1, 2, 3, 4, 5],
[ 6, 7, 8, 9, 10],
[11, 12, 13, 14, 15],
[16, 17, 18, 19, 20],
[21, 22, 23, 24, 25]])
>>> import sys
>>> numpy.savetxt(sys.stdout, a, delimiter=", ", fmt="%5d")
1, 2, 3, 4, 5
6, 7, 8, 9, 10
11, 12, 13, 14, 15
16, 17, 18, 19, 20
21, 22, 23, 24, 25
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