On Mon, Nov 30, 2009 at 5:55 PM, questions anon <questions.a...@gmail.com>wrote:
> I would like to read in two columns of data from a *.txt file
>
> I type
>
> f=open("e:/testascii.txt")
> import pylab
> pylab.scatter(f)
>
> and then receive an error.
> How do I point it to each column and do I need to do anything about the
> space gap between the two columns?
> Thanks in advance.
>
A sample of the data is always helpful, but I'll take a shot in the dark.
If you have data like this:
2.31 72
98 23
... ....
34 7.32
And those are x y pairs you could do something like this:
f = open('input.txt')
#List comprehension to read all the lines as [[x1, y1], [x2, y2], ... [xn,
yn]]
data = [line.split() for line in f]
# Reorient values as [(x1, x2,... xn), (y1, y2, ... yn)]
data = zip(*data)
# plot the xy vals
pylab.scatter(data[0], data[1])
That should be something along the lines of what you're looking for.
HTH,
Wayne
--
To be considered stupid and to be told so is more painful than being called
gluttonous, mendacious, violent, lascivious, lazy, cowardly: every weakness,
every vice, has found its defenders, its rhetoric, its ennoblement and
exaltation, but stupidity hasn’t. - Primo Levi
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