Squeeze Methods for Generating Gamma Variates
Squeeze Methods for Generating Gamma Variates
复制标题
生成伽马变量的压缩方法
DOI:
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发表时间:
1980
期刊:
影响因子:
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通讯作者:
R. Lal
中科院分区:
文献类型:
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作者:
B. Schmeiser;R. Lal
Abstract Two algorithms are given for generating gamma distributed random variables. The algorithms, which are valid when the shape parameter is greater than one, use a uniform majorizing function for the body of the distribution and exponential majorizing functions for the tails. The algorithms are self-contained, requiring only U (0, 1) variates. Comparisons are made to four competitive algorithms in terms of marginal execution times, initialization time, and memory requirements. Marginal execution times are less than those of existing methods for all values of the shape parameter, as implemented here in FORTRAN.