random number generator of normal distribution in 2D

1 次查看（过去 30 天）
Camilla Colombo
Camilla Colombo 2011-5-27
Hi, does some of you know if is availiable in Matlab a function that generates random numbers from the 2D normal distribution with mean parameter mu and standard deviation parameter sigma provided in the two dimensions? And also the function to get the Gaussian curve corresponding. Something equivalent to: x = normrnd(mean,sigma,npoint); y = gaussmf(x,[sigma mean]); but in 2D.
Many thanks
Camilla

请先登录，再回答此问题。

回答（2 个）

Bjorn Gustavsson
Bjorn Gustavsson 2011-5-27
Maybe something like this for the 2-D random points scattered around r0 with a 2-D normal distribution with major and minor widths of sigma1 and 2 rotated phi radians.
r(1,:) = sigma1*randn([nx*ny,1]); r(2,:) = sigma2*randn([nx*ny,1]);
rotM = [cos(phi) -sin(phi);sin(phi) cos(phi)]; r = rotM*r; r0 = [x0,y0];
r(1,:) = r(1,:) + r0(1); r(2,:) = r(2,:) + r0(2);
HTH, Bjoern
Tom Lane
Tom Lane 2011-5-29
Camilla, if you have normrnd then you must have the Statistics Toolbox. In that case check out the mvnrnd function for random number generation, and mvnpdf for the density function.
-- Tom

类别

在 Help Center 和 File Exchange 中查找有关 Binomial Distribution 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by