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[求助]
Matlab 与帕累托分布
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求高手相助！！！急！！！ 什么是帕累托分布、截头帕累托分布，在Matlab程序里怎么用！！！ GPRND Random arrays from the generalized Pareto distribution. R = GPRND(K,SIGMA,THETA) returns an array of random numbers chosen from the generalized Pareto (GP) distribution with tail index (shape) parameter K, scale parameter SIGMA, and threshold (location) parameter THETA. The size of R is the common size of K, SIGMA, and THETA if all are arrays. If any parameter is a scalar, the size of R is the size of the other parameters. R = GPRND(K,SIGMA,THETA,M,N,...) or R = GPRND(K,SIGMA,[M,N,...]) returns an M-by-N-by-... array. When K = 0 and THETA = 0, the GP is equivalent to the exponential distribution. When K > 0 and THETA = SIGMA/K, the GP is equivalent to the Pareto distribution. The mean of the GP is not finite when K >= 1, and the variance is not finite when K >= 1/2. When K >= 0, the GP has positive density for X>THETA, or, when K < 0, for 0 <= (X-THETA)/SIGMA <= -1/K. 看不懂 (K,SIGMA,THETA,M,N,...) 这些参数都是什么意思？？？？ 非常感谢111 |
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2楼2012-11-28 09:25:42
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