source:
development/pyvolution-1d/util.py
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2898
| Last change on this file since 2898 was 2716, checked in by jakeman, 19 years ago | |
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| File size: 270 bytes | |
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| 1 | """ |
| 2 | This module contains various auxiliary function used by pyvolution. |
| 3 | """ |
| 4 | |
| 5 | def mean(x): |
| 6 | from Numeric import sum |
| 7 | return sum(x)/len(x) |
| 8 | |
| 9 | |
| 10 | def gradient(x0, x1, q0, q1): |
| 11 | |
| 12 | if q1-q0 != 0: |
| 13 | a = (q1-q0)/(x1-x0) |
| 14 | else: |
| 15 | a = 0 |
| 16 | |
| 17 | return a |
| 18 |
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