我下载了一个matlab6.5绿色版，工具箱中有mvnrnd这个函数，路径为D
rogram FilesMatlab6p5FULLtoolboxstatsmvnrnd.m，但在运行程序时提示??? Undefined function or variable 'mvnrnd'.
我在命令窗口中输入which mvnrnd后显示
D
rogram FilesMatlab6p5FULLtoolboxstatsmvnrnd.m Has no license available
然后输入help mvnrnd后显示
MVNRND Random vectors from the multivariate normal distribution.
R = MVNRND(MU,SIGMA) returns an n-by-d matrix R of random vectors
chosen from the multivariate normal distribution with mean vector MU,
and covariance matrix SIGMA. MU is an n-by-d matrix, and MVNRND
generates each row of R using the corresponding row of MU. SIGMA is a
d-by-d symmetric positive semi-definite matrix, or a d-by-d-by-n array.
If SIGMA is an array, MVNRND generates each row of R using the
corresponding page of SIGMA, i.e., MVNRND computes R(I,
using MU(I,
and SIGMA(:,:,I). If MU is a 1-by-d vector, MVNRND replicates it to
match the trailing dimension of SIGMA.
R = MVNRND(MU,SIGMA,CASES) returns a CASES-by-d matrix R of random
vectors chosen from the multivariate normal distribution with a common
1-by-d mean vector MU, and a common d-by-d covariance matrix SIGMA.
再输入which mvnrnd后显示
D
rogram FilesMatlab6p5FULLtoolboxstatsmvnrnd.m
这是什么原因？
