On Fri, Dec 3, 2010 at 8:34 PM, K. Larsen <kroy...@gmail.com> wrote:
> The LTSpice circuit simulation program outputs a file that looks like this:
>
> Freq. V(n003) V(n005) V(n007)
> 1.00000e+000 (-1.68072e+002dB,1.79085e+002°)
> (-1.71453e-006dB,-3.60000e-002°) (-8.40364e+001dB,8.99964e+001°)
> 1.07177e+000 (-1.66868e+002dB,1.79145e+002°)
> (-1.96947e-006dB,-3.85838e-002°) (-8.34343e+001dB,8.99961e+001°)
> 1.14870e+000 (-1.65664e+002dB,1.79202e+002°)
> (-2.26233e-006dB,-4.13531e-002°) (-8.28323e+001dB,8.99959e+001°)
> ...
>
>
Complicated text file formats like this can be a mess to deal with. One
trick I do to simplify the problem is to (if the files are not large) load
an entire file into a string and replace any un-needed characters with
whitespace. So, replacing the '"', 'dB', '(', ')', and ',' with a space
would yield:
1.00000e+000 -1.68072e+002 1.79085e+002 -1.71453e-006 -3.60000e-002
-8.40364e+001 8.99964e+001
1.07177e+000 -1.66868e+002 1.79145e+002 -1.96947e-006 -3.85838e-002
-8.34343e+001 8.99961e+001
1.14870e+000 -1.65664e+002 1.79202e+002 -2.26233e-006 -4.13531e-002
-8.28323e+001 8.99959e+001
Which could be put into a StringIO object, and then fed into numpy.loadtxt()
function to get your numpy arrays. Does that help?
Ben Root
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