Why the code is giving different results, every time I run it ???

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Mohan
Mohan 2013-2-1
clc;clear all;close all;
net = newff([-10 10],[4 1],{'tansig','purelin'});
p = [-10 -5 0 5 10];
t = [0 0 1 1 1];
y = sim(net,p);
e = t-y;
perf = mse(e);
%%%%%%%%%%%%%%%%% End of the Code %%%%%%%%%%%%%%%%%%%%%%%
Why the result of the code is giving different results every time I run it.
  1 个评论
Jan
Jan 2013-2-1
clc;clear all;close all; is a brute cleaning. Especially clear all is not useful, but use clear variables to allow Matlab to keep the expensively parsed functions in the memory.

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采纳的回答

Shashank Prasanna
This is due to random setting of the initial weights and biases.
You can confirm that by setting the random seed each time and your results will be reproducible:
clc;clear all;close all;
rand('seed',0) % set random seed
net = newff([-10 10],[4 1],{'tansig','purelin'});
p = [-10 -5 0 5 10];
t = [0 0 1 1 1];
y = sim(net,p);
e = t-y;
perf = mse(e);

更多回答（1 个）

Vito
Vito 2013-2-1
Each time occurs network initialization. That is initial IW installation. Usually it occurs in a random way. Therefore result, on an untrained network always the different.

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