Why does my time series output of my NARXNET have less elements than my input?

Question

Ghazi Binarandi 2016-2-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/270080-why-does-my-time-series-output-of-my-narxnet-have-less-elements-than-my-input

评论： Greg Heath 2016-3-4

Hi all,

I trained a neural network using narxnet and generated the Simulink block of it using gensim. When I delivered a time series into the input port of the neural network block (and fed back the output to the feedback signal port), I obtained a time series as the output with a length that was less than my input size. My original input time series size is 60001x1, but my output is only 61x1. Why does this happen?

Thank you,

Ghazi

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Greg Heath 2016-2-27

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/270080-why-does-my-time-series-output-of-my-narxnet-have-less-elements-than-my-input#answer_211411

Because the first few data points are used as delays.

Hope this helps

Thank you for formally accepting my answer

Greg

2 个评论
显示无隐藏无

Ghazi Binarandi 2016-2-28

编辑：Ghazi Binarandi 2016-2-28

I think that's not the case. I just figured out that the sampling time was the reason. I didn't set the sampling time in 'gensim.' So the sampling time is set to be 1, the default value. Then, I copied the Simulink neural network block to the other Simulink file that has sampling time of 1/1000. I think that's why the element size is reduced from 60001 to 61. Thanks for the answer anyway!