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# Mehmet Demirel

### University of Twente

13 total contributions since 2009

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Posted

setx and newff.. two networks, the same setx parameters but different sim results..
Hello, I test two cases, 1) create a network using nntool and train it and simulate for a test data Result1 = sim(network1,IN)...

4 years ago | 1316 views

Responded

Re: area and jbfill codes
Yes this is exactly what i need!! Thanks Sadik!! Regards, Mehmet

4 years ago | 2716 views

Posted

area and jbfill codes
Hello, I was using area function to draw grey shaded confidence interval (5%-95%). X=[Q95 Q5]; area(X) where Q95 and Q5 are ...

4 years ago | 2716 views

Posted

trainbr and trainlm: why different performance figures?
Hello, I am testing two training functions using nntool and two versions of Matlab: R2008b and R2010b. I find it very strange w...

5 years ago | 2503 views

Responded

Re: Objective function for newff model with trainlm
This is an interesting approach if i can figure out more. I have several unclear parts as listed below, //what do you mean by ...

6 years ago | 5379 views

Responded

Re: Objective function for newff model with trainlm
I will try to explain better; we intend to forecast low flows (water discharge below 1100 m3s-1) in the Rhine River, using relev...

6 years ago | 5379 views

Responded

Re: Objective function for newff model with trainlm
Thanks for the quick reaction, I have red this and already got into my code MSEgoal = 0.01*mean(var(t')) I looked now at "heath ...

6 years ago | 5379 views

Posted

Objective function for newff model with trainlm
Hello, I am confused with introducing a new objective function to newff network. I use trainlm supervised training method Afte...

6 years ago | 5379 views

Responded

Re: Xtick and Xticklabel handeling.
Hello Serval, I tried to use your code for an other y data. However the Y axis has always 0:0.1:1 values overwritten on my real...

6 years ago | 16529 views

Responded

Re: ARMAX Parameters (using without Matlab)
q is a shift operator, see below for a simple example, Armax Model: y(t) = B(q)u(t) + C(q)e(t) B(q) = 0.7354 (+-0.01128) q^-7 ...

8 years ago | 2528 views

Posted

Prediction with ARMAX
Question is about data introduction to armax: M is a two column matrix containing output (y) and input (u) time series. Each row...

8 years ago | 7071 views

Posted

Levenberg-Marquardt (trainlm) and Nash-Sutcliffe efficiency coefficient
After training a feedforward network with trainlm a fast convergence is reached with my data. c=Getx(net) will get all network w...

8 years ago | 4864 views

Responded

Re: Trainlm error definition
Dear Pavan And Greg, I have a similar but simplier problem in performance function: I would like to edit mse.m because it calc...

8 years ago | 3318 views