[Tutor] range()-like function for dealing with floats...?

[Eike Welk]

On Friday 30 March 2007 11:17, Joydeep Mitra wrote:
> Hi all,
> I need to generate a sequence of real numbers that are evenly
> spaced. I have used loops for this purpose until now, but it gets
> kinna messy when you gotta do it a number of times in a program.
> The range function, as per my knowledge, accepts parameters and
> return values only as integers.
> Is there a function in python, which performs the task of the
> range() function with floats?
>
> Joy

The linspace function from the NumPy library (http://numpy.scipy.org/) 
does exactly what you want:

In [1]:from numpy import *
In [2]:linspace(1, 1.1, 4)
Out[2]:array([ 1.        ,  1.03333333,  1.06666667,  1.1       ])

If you do a lot of computations with sequences of floating point 
numbers, you might consider installing this libraray.

Alternatively you could write a similar function that returns such a 
sequence. (Excuse me if this is trivial for you.):

def myLinspace(xMin, xMax, nX):
    deltaX = (xMax - xMin)/(nX-1)
    x = [xMin + deltaX*i for i in range(nX)]
    return x


Regards, Eike.

-- 
Snail:                             Phone:
Eike Welk                          xx49-241-4127686
Stolberger Str. 72
52068 Aachen                       Mail:
Germany                            eike.welk at post.rwth-aachen.de