Thank you Very much, This will help me a lot. with best regards, Sudheer
----- Original Message ----- > From: Derek Homeier <de...@astro.physik.uni-goettingen.de> > To: Discussion of Numerical Python <numpy-discussion@scipy.org> > Cc: > Sent: Friday, 10 May 2013 6:10 PM > Subject: Re: [Numpy-discussion] printing array in tabular form > > On 10.05.2013, at 1:20PM, Sudheer Joseph <sudheer.jos...@yahoo.com> wrote: > >> 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 >> > Admittedly the formatting options in Python can be confusing to beginners, > precisely > since they are much more powerful than for many other languages. As already > pointed > out, formats of the type '(5i5)' are very common to Fortran programs and > thus readily > supported by the language. np.savetxt is just a convenience function to > support > a number > of similarly common output types, and it can create csv, tab-separated, or > plenty of other > outputs from a numpy array just out of the box. > But you added to the confusion as you did not make it clear that you were not > just requiring > a plain csv file as your Fortran example would create (and the first version > did > not even > have the commas); since this is a rather non-standard form you will just have > to > write a > short loop yourself, wether you are using Fortran or Python. > >> Infact the program which should read this file > requires it in specified format which should look like >> IL = 1,2,3,4,5 >> 1,2,3,4,5 >> 1,2,3,4,5 >> > The formats are all documented > http://docs.python.org/2/library/string.html#format-specification-mini-language > one important thing to know is that you can pretty much add (i.e. > concatenate) > them like strings: > > print(("%6s"+4*"%d,"+"%d\n") % (("IL = > ",)+tuple(IL[:5]))) > > or, perhaps a bit clearer: > > fmt = "%6s"+4*"%d,"+"%d\n" > print_t = ("IL = ",)+tuple(IL[:5]) > print(fmt % print_t) > > The other important bit to keep in mind is that all arguments have to be > passed > as tuples. > This should allow you to write a loop to print with a "header" or an > empty header column > for the subsequent lines as you see fit. > Except for the string field which is explicitly formatted "%s" here, > this is mostly equivalent > to the example Henry just posted. > > HTH, > Derek > > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@scipy.org > http://mail.scipy.org/mailman/listinfo/numpy-discussion > _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
