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January 29, 2019 19:46
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Just a small python library that provdes binompdf and binomcdf in TI Nspire syntax
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''' | |
Copyright (c) 2018 Patrick Pedersen <ctx.xda@gmail.com> | |
Permission is hereby granted, free of charge, to any person | |
obtaining a copy of this software and associated documentation | |
files (the "Software"), to deal in the Software without | |
restriction, including without limitation the rights to use, | |
copy, modify, merge, publish, distribute, sublicense, and/or sell | |
copies of the Software, and to permit persons to whom the | |
Software is furnished to do so, subject to the following | |
conditions: | |
The above copyright notice and this permission notice shall be | |
included in all copies or substantial portions of the Software. | |
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES | |
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT | |
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
OTHER DEALINGS IN THE SOFTWARE. | |
''' | |
# Author: Patrick Pedersen <ctx.xda@gmail.com> | |
# Dependencies: SciPy | |
# Description: Just a small python library that provdes binompdf and binomcdf in TI Nspire syntax | |
import scipy.stats | |
def binompdf(n, p, k): | |
return scipy.stats.binom.pmf(k, n, p) | |
def binomcdf(n, p, lower, upper): | |
if lower == 0: | |
return scipy.stats.binom.cdf(upper, n, p) | |
if upper == n: | |
return 1 - scipy.stats.binom.cdf(lower-1, n, p) | |
# Bit of recursion ain't gonna kill nobody | |
return 1 - binomcdf(n, p, 0, lower - 1) - binomcdf(n, p, upper + 1, n) |
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