matlab rands函数问题

[W1,B1]=rands(2,2)
??? Error using ==> rands
Too many output arguments.
这个是怎么回事呢

只能返回一个参数

这个问题和神经元算法实现有关。 你看一下程序的源代码，注意看最下下面标出的那两行: function [w,b] = rands(s,pr) %rands symmetric random weight/bias initialization function. % % syntax % % w = rands(s,pr) % m = rands(s,r) % v = rands(s); % % description % % rands is a weight/bias initialization function. % % rands(s,pr) takes, % s - number of neurons. % pr - rx2 matrix of r input ranges. % and returns an s-by-r weight matrix of random values between -1 and 1. % % rands(s,r) returns an s-by-r matrix of random values. % rands(s) returns an s-by-1 vector of random values. % % examples % % here three sets of random values are generated with rands. % % rands(4,[0 1; -2 2]) % rands(4) % rands(2,3) % % network use % % to prepare the weights and the bias of layer i of a custom network % to be initialized with rands: % 1) set net.initfcn to 'initlay'. % (net.initparam will automatically become initlay's default parameters.) % 2) set net.layers{i}.initfcn to 'initwb'. % 3) set each net.inputweights{i,j}.initfcn to 'rands'. % set each net.layerweights{i,j}.initfcn to 'rands'; % set each net.biases{i}.initfcn to 'rands'. % % to initialize the network call init. % % see also randnr, randnc, initwb, initlay, init % mark beale, 1-31-92 % revised 12-15-93, mb % revised 11-31-97, mb % copyright 1992-2008 the mathworks, inc. % $revision: 1.1.6.7 $ $date: 2008/06/20 08:04:33 $ fn = mfilename; if (nargin < 1), error('nnet:arguments','not enough arguments.'); end if ischar(s) switch(s) case 'name' w = 'midpoint'; otherwise, error('nnet:arguments',['unrecognized code: ''' s '''']) end return end if nargin == 1 r = 1; elseif size(pr,2) == 1 r = pr; else r = size(pr,1); end w = 2*rand(s,r)-1;//看着个地方 % **[ nnt2 support ]** if nargout == 2 b = 2*rand(s,1)-1; //看着个地方 end])