[newbie] problem making equally spaced value array with linspace

Jean Dubois jeandubois314 at gmail.com
Tue Dec 18 13:37:01 CET 2012


I have trouble with the code beneath to make an array with equally
spaced values
When I enter 100e-6 as start value, 700e-6 as end value and 100e-6 I
get the following result:
[ 0.0001   0.00022  0.00034  0.00046  0.00058  0.0007 ]
But I was hoping for:
[ 0.0001   0.0002  0.0003  0.0004  0.0005  0.0006 0.0007]
It works correctly for other values like 1,7,1 but not for 0.1,0.7,0.1
then again for 0.01,0.07,0.01

What I find strange is that for the 1st example "1+abs(float(endvalue)-
float(startvalue))/float(incr)" gives 7.0 but int() of this value
gives 6
can someone provide help with this issue?
thanks
jean

#!/usr/bin/python
import math
import numpy as np
print "Enter start value as a float (e.g. 0.001) or in scientific
notation (e.g. 1e-3): ",
startvalue = raw_input()
print "Enter end value: ",
endvalue = raw_input()
print "Enter step: ",
incr = raw_input()
#nom = number of measurements
nom=int(1+abs(float(endvalue)-float(startvalue))/float(incr))
array=np.linspace(float(startvalue), float(endvalue), float(nom))
print "Array with current values: ",array



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