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# How to output data to a file

Here is my code that graphs a function:

z1=2*pi*650*10^6

p1=2*pi*1.95*10^9

p2=2*pi*5*10^9

adc=.667

deltaF=.1*10^9

N=(adc*p1*p2)/z1

M(freq)=(2*i*pi*freq+z1)/((2*i*pi*freq+p1)*(2*i*pi*freq+p2))

Z=abs(N*M(freq))

g(freq)=20*log(Z,10)

pts=[(freq,g(freq).n()) for freq in srange(10^8,10^11,deltaF)]

list_plot(pts, plotjoined=True, scale='semilogx', gridlines="minor", ymin=-25, ymax=5)


How do I output this data to a file so I can compare it to data generated by another piece of software?

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## 3 answers

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If I understood you right you just want to plot the data contained in your list pts.

This can for example be done with the python csv module:

plotlist=[(1,2),(3,4),(6,10)]
import csv
csvfile = open('/path/to/file/plotlist.csv', 'wb')
csvwriter = csv.writer(csvfile, delimiter=';')
for xy in plotlist:
csvwriter.writerow([xy,xy])
csvfile.close()


You can then open the csv file for example with open office calc...

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I actually want to output just the x and y axis data. The provided link does not appear to provide me with this function.

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## Comments

1

The second link from the answer provides you with this function

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Asked: 2013-01-11 04:52:02 -0500

Seen: 1,998 times

Last updated: Jan 14 '13