Mathematical Operations on Array
I am loading text into an array and would like to convert the values.
from math import *
from numpy import *
from pylab import *
data=loadtxt('raw.dat')
mincos=degrees(acos(data[:,0]))
minazi=degrees(data[:,1])
minthick=data[:,2]/0.006858
I am not sure why degrees() works, but acos() does not.
I receive the following
Traceback (most recent call last):
File "C:\ test.py", line 6, in ?
mincos=degrees(acos(float(data[:,0])))
TypeError: only length-1 arrays can be converted to Python scalars
Can anyone tell me what I am doing wrong?
--
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Re: Mathematical Operations on Array
On Apr 1, 9:52 am, Peter Otten <[email protected]> wrote: > [email protected] wrote: > > I am loading text into an array and would like to convert the values. > > > from math import * > > from numpy import * > > from pylab import * > > > data=loadtxt('raw.dat') > > mincos=degrees(acos(data[:,0])) > > minazi=degrees(data[:,1]) > > minthick=data[:,2]/0.006858 > > > I am not sure why degrees() works, but acos() does not. > > > I receive the following > > > Traceback (most recent call last): > > File "C:\ test.py", line 6, in ? > > mincos=degrees(acos(float(data[:,0]))) > > TypeError: only length-1 arrays can be converted to Python scalars > > > Can anyone tell me what I am doing wrong? > > Using star-imports. > > Among other things it makes it hard to keep track of where things are coming > from: > > >>> from math import * > >>> from numpy import * > >>> degrees > > >>> acos > > >>> acos.__module__ > 'math' > >>> arccos > > - Hide quoted text - > > - Show quoted text - Thank you. -- http://mail.python.org/mailman/listinfo/python-list
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