Sim command not working

Hallo,

Can anyone explain why 'sim' command in neural network is not working in Matlab version 2015 and above? After training the network, I wanted to simulate the values to predict the accuracy of the network. I used the command :

y=sim(net,p); where y is the simulated values matrix of the input matrix p

When i try to do the same using the neural network toolbox, I was able to simulate the values but not able to use 'sim' as objective function for the subsequent optimization methods.

Regards, Bharath

Answer 1

[Greg Heath]

Replace

 train( net, p, t )

with reasonable variations of

 [ net tr y e ] = train( net, p, t );

where y = net( x ) and e = t-y

Hope this helps.

Thank you for formally accepting my answer

Answer 2

[Greg Heath]

You cannot use the names of MATLAB commands or functions for your own use. They are RESERVED.

Any of the commands

 lookfor sim 
 help sim
 doc sim
 which sim

would have indicated a reserved name.

By the way, as you can gather from the help or doc documentation on fitnet, patternnet, etc the command y = sim(net,x) has been replaced by y = net(x). SIM is now used w.r.t. SIMULINK.

Hope this helps.

Thank you for formally accepting my answer

Greg

Answer 3

[Bharathwaj Krishnamoorthi]

Hi Greg,

I appreciate your answer. And I was not using the Matlab commands for my own use. Please check the command for simulating the neural network in pre-Matlab2015 versions. I have attached the picture containing the result ( which is an empty matrix) when i used both sim(net,x) and net(x).

Looking for an answer,

Bharath

[Steven Lord]

Type this command at the Trial>> prompt and show the output.

net

[Greg Heath]

Your attachment is unreadable. Just cut and paste the code. Greg

NEVER MIND: CTRL + DID THE JOB!