[Numpy-discussion] printing array in tabular form
Daniele Nicolodi
daniele at grinta.net
Fri May 10 08:51:55 EDT 2013
On 10/05/2013 13:20, Sudheer Joseph wrote:
> Hi,
> I am trying to learn Python after feeling its utility in coding and
> also reading a bit aboutits potential only, please do not put words
> in to my mouth like below.
I didn't put words in your mouth, I simply quoted emails you sent to the
list and gave my interpretation of what you wrote.
>>> Before denigrating a programming language
>
> If some one has a quick way I would like to learn from them or get a referecence
> where the formatting part is described which was
> my intention while posting here. As I have been using fortran I just tried
> to use it to explain my requirement
For references about string formatting in Python:
http://docs.python.org/2/library/string.html#formatstrings
http://docs.python.org/2/library/stdtypes.html#string-formatting
for the numpy array to text formatting:
http://docs.scipy.org/doc/numpy/reference/generated/numpy.savetxt.html
writing a function to do what you ask is trivial. Unfortunately there is
no "format the thing as I wish" function.
If you wish to format numpy arrays preceding them with a variable name,
the following is a possible solution that gives the same formatting as
in your example:
import numpy as np
import sys
def format(out, v, name):
header = "{} = ".format(name)
out.write(header)
np.savetxt(out, v, fmt="%d", delimiter=", ",
newline="\n" + " " * len(header))
out.write("\n")
IL = np.array([range(5), ] * 5)
format(sys.stdout, IL, "IL")
Cheers,
Daniele
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