从命令行使用 nntool [MATLAB] [英] Using nntool [MATLAB] from command line
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问题描述
我有这个代码:
in = [5 columns of data-points];
out = [1 column of data-points];
net = newfit(in,out,5);
net = train(net,in,out);
现在我想
- 访问生成的误差变量(以便我可以计算平均误差等)
- 在循环中运行它,所以我想在循环之间重新初始化权重.
- 访问存储时间运行所需的变量
- access the error variable that is generated (so that I can calculate the mean error etc.)
- run this in a loop, so I want to re-initialize weights between loops.
- access the variable that stores the time it took to run
如何从命令行完成这三件事?
How can these three things be done from command line?
[我知道如何使用 nntool
GUI 完成这些事情]
[I know how these things can be done with nntool
GUI]
推荐答案
示例:
% some random data
in = rand(100,5)';
out = rand(100,1)';
% create a feed-forward back-propagation neural network
% (1 hidden layer with 5 neurons)
net = newfit(in,out,5);
net.trainParam.showWindow = 0; % dont show GUI
% repeat 10 times
rmse = [];
t = [];
for i=1:10
net = init(net); % initialize network weights
tic
net = train(net,in,out); % train
predicted = sim(net, in); % test
t(i) = toc;
r = (out - predicted); % residuals
rmse(i) = sqrt(mean(r.^2)); % root mean square error
end
% plot errors and elapsed times
bar([t; rmse]', 'grouped'), xlabel('Runs')
legend({'Elapsed Time' 'RMSE'}, 'orientation','horizontal')
注意:在 R2010b 中,newfit
函数被弃用,取而代之的是 fitnet
,使用以下代码创建网络:
NOTE: In R2010b, newfit
function was deprecated in favor of fitnet
, use the following code instead to create the network:
% old
%net = newfit(in,out,5);
% new
net = fitnet(5); % create ANN
net = configure(net, in, out); % set input/output sizes according to data
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