Why Sage not execute the python code?
from scipy import *
from pylab import *
sample_rate=1000.00
t=r_[0:0.6:1/sample_rate]
N=len(t)
s=sin(2*pi*50*t)+sin(2*pi*70*t+pi/4)
S=fft(s)
f=sample_rate*r_[0:(N/2)]/N
n=len(f)
plot(f,abs(S[0:n])/N)
error message:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/sage/sagenb/sage_notebook/worksheets/rfcard/0/code/
12.py", line 15, in <module>
S=fft(s)
File "", line 1, in <module>
File "/home/sage/sage_install/sage/local/lib/python2.6/site-packages/
numpy/fft/fftpack.py", line 159, in fft
return _raw_fft(a, n, axis, fftpack.cffti, fftpack.cfftf,
_fft_cache)
File "/home/sage/sage_install/sage/local/lib/python2.6/site-packages/
numpy/fft/fftpack.py", line 66, in _raw_fft
r = work_function(a, wsave)
TypeError: array cannot be safely cast to required type
Thank!
Rafael
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