octave-nnet 0.1.13-2 / usr / share / octave / packages / nnet-0.1.13 / doc-cache

# Created by Octave 3.6.1, Sun Apr 01 17:24:32 2012 UTC <root@t61>
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dhardlim


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 -- Function File:  [A = dhardlim (N)




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dividerand


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 -- Function File: [
          TRAINVECTORS,VALIDATIONVECTORS,TESTVECTORS,INDEXOFTRAIN,INDEXOFVALIDATION,INDEXOFTEST]
          = dividerand (ALLCASES,TRAINRATIO,VALRATIO,TESTRATIO)
     Divide the vectors in training, validation and test group
     according to the informed ratios


          [trainVectors,validationVectors,testVectors,indexOfTrain,indexOfValidatio
          n,indexOfTest] = dividerand(allCases,trainRatio,valRatio,testRatio)

          The ratios are normalized. This way:

          dividerand(xx,1,2,3) == dividerand(xx,10,20,30)





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Divide the vectors in training, validation and test group according to
the infor



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dposlin


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 -- Function File:  A= poslin (N)
     `poslin' is a positive linear transfer function used by neural
     networks




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`poslin' is a positive linear transfer function used by neural networks




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dsatlin


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 -- Function File:  [A = dsatlin (N)




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dsatlins


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 -- Function File:  [A = satlins (N)
     A neural feed-forward network will be trained with `trainlm'





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A neural feed-forward network will be trained with `trainlm'




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hardlim


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 -- Function File:  [A = hardlim (N)




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hardlims


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 -- Function File:  [A = hardlims (N)




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ind2vec


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 -- Function File: VEC = ind2vec (IND)
     `vec2ind' convert indices to vector

          EXAMPLE 1
          vec = [1 2 3; 4 5 6; 7 8 9];

          ind = vec2ind(vec)
          The prompt output will be:
          ans =
             1 2 3 1 2 3 1 2 3





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`vec2ind' convert indices to vector




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isposint


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 -- Function File:  F = isposint(N)
     `isposint' returns true for positive integer values.

            isposint(1)   # this returns TRUE
            isposint(0.5) # this returns FALSE
            isposint(0)   # this also return FALSE
            isposint(-1)  # this also returns FALSE





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`isposint' returns true for positive integer values.



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logsig


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 -- Function File:  A = logsig (N)
     `logsig' is a non-linear transfer function used to train neural
     networks.  This function can be used in newff(...) to create a new
     feed forward multi-layer neural network.





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`logsig' is a non-linear transfer function used to train neural
networks.



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mapstd


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 -- Function File: [ YY,PS] = mapstd (XX,YMEAN,YSTD)
     Map values to mean 0 and standard derivation to 1.

          [YY,PS] = mapstd(XX,ymean,ystd)

             Apply the conversion and returns YY as (YY-ymean)/ystd.

          [YY,PS] = mapstd(XX,FP)

             Apply the conversion but using an struct to inform target mean/stddev.
             This is the same of [YY,PS]=mapstd(XX,FP.ymean, FP.ystd).

          YY = mapstd('apply',XX,PS)

             Reapply the conversion based on a previous operation data.
             PS stores the mean and stddev of the first XX used.

          XX = mapstd('reverse',YY,PS)

             Reverse a conversion of a previous applied operation.

          dx_dy = mapstd('dx',XX,YY,PS)

             Returns the derivative of Y with respect to X.

          dx_dy = mapstd('dx',XX,[],PS)

             Returns the derivative (less efficient).

          name = mapstd('name');

             Returns the name of this convesion process.

          FP = mapstd('pdefaults');

             Returns the default process parameters.

          names = mapstd('pnames');

             Returns the description of the process parameters.

          mapstd('pcheck',FP);

             Raises an error if FP has some inconsistent.





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Map values to mean 0 and standard derivation to 1.



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min_max


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 -- Function File:  PR = min_max (PP)
     `min_max' returns variable Pr with range of matrix rows

          PR - R x 2 matrix of min and max values for R input elements

          Pp = [1 2 3; -1 -0.5 -3]
          pr = min_max(Pp);
          pr = [1 3; -0.5 -3];




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`min_max' returns variable Pr with range of matrix rows




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newff


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 -- Function File: NET = newff (PR,SS,TRF,BTF,BLF,PF)
     `newff' create a feed-forward backpropagation network

          Pr - R x 2 matrix of min and max values for R input elements
          Ss - 1 x Ni row vector with size of ith layer, for N layers
          trf - 1 x Ni list with transfer function of ith layer,
                default = "tansig"
          btf - Batch network training function,
                default = "trainlm"
          blf - Batch weight/bias learning function,
                default = "learngdm"
          pf  - Performance function,
                default = "mse".

          EXAMPLE 1
          Pr = [0.1 0.8; 0.1 0.75; 0.01 0.8];
               it's a 3 x 2 matrix, this means 3 input neurons

          net = newff(Pr, [4 1], {"tansig","purelin"}, "trainlm", "learngdm", "mse");





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`newff' create a feed-forward backpropagation network




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newp


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 -- Function File: NET = newp (PR,SS,TRANSFUNC,LEARNFUNC)
     `newp' create a perceptron

          PLEASE DON'T USE THIS FUNCTIONS, IT'S STILL NOT FINISHED!
          =========================================================

          Pr - R x 2 matrix of min and max values for R input elements
          ss - a scalar value with the number of neurons
          transFunc - a string with the transfer function
                default = "hardlim"
          learnFunc - a string with the learning function
                default = "learnp"





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`newp' create a perceptron




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poslin


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 -- Function File:  A= poslin (N)
     `poslin' is a positive linear transfer function used by neural
     networks




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`poslin' is a positive linear transfer function used by neural networks




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poststd


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 -- Function File:  [PP,TT] = poststd(PN,MEANP,,STDP,TN,MEANT,STDT)
     `poststd' postprocesses the data which has been preprocessed by
     `prestd'.




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`poststd' postprocesses the data which has been preprocessed by
`prestd'.



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prestd


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 -- Function File:  [PN,MEANP,STDP,TN,MEANT,STDT] =prestd(P,T)
     `prestd' preprocesses the data so that the mean is 0 and the
     standard deviation is 1.




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`prestd' preprocesses the data so that the mean is 0 and the standard
deviation 



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purelin


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 -- Function File:  A= purelin (N)
     `purelin' is a linear transfer function used by neural networks




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`purelin' is a linear transfer function used by neural networks




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radbas


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 -- Function File:  radbas (N)
     Radial basis transfer function.

     `radbas(n) = exp(-n^2)'





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Radial basis transfer function.



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satlin


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 -- Function File:  [A = satlin (N)
     A neural feed-forward network will be trained with `trainlm'





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A neural feed-forward network will be trained with `trainlm'




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satlins


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 -- Function File:  [A = satlins (N)
     A neural feed-forward network will be trained with `trainlm'





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A neural feed-forward network will be trained with `trainlm'




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saveMLPStruct


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 -- Function File:  saveMLPStruct (NET,STRFILENAME)
     `saveStruct' saves a neural network structure to *.txt files




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`saveStruct' saves a neural network structure to *.



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sim


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 -- Function File: NETOUTPUT = sim (NET, MINPUT)
     `sim' is usuable to simulate a before defined neural network.
     `net' is created with newff(...) and MINPUT should be the
     corresponding input data set!




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`sim' is usuable to simulate a before defined neural network.



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subset


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 -- Function File:  [MTRAIN, MTEST, MVALI] = subset
          (MDATA,NTARGETS,IOPTI,FTEST,FVALI)
     `subset' splits the main data matrix which contains inputs and
     targets into 2 or 3 subsets depending on the parameters.

     The first parameter MDATA must be in row order. This means if the
     network contains three inputs, the matrix must be have 3 rows and
     x columns to define the data for the inputs. And some more rows
     for the outputs (targets), e.g. a neural network with three inputs
     and two outputs must have 5 rows with x columns!  The second
     parameter NTARGETS defines the number or rows which contains the
     target values!  The third argument `iOpti' is optional and can
     have three status: 	   0: no optimization     1: will
     randomise the column order and order the columns containing min
     and max values to be in the train set     2: will NOT randomise
     the column order, but order the columns containing min and max
     values to be in the train set 	   default value is `1' The
     fourth argument `fTest' is also optional and defines how much data
     sets will be in the test set. Default value is `1/3' The fifth
     parameter `fTrain' is also optional and defines how much data sets
     will be in the train set. Default value is `1/6' So we have 50% of
     all data sets which are for training with the default values.

            [mTrain, mTest] = subset(mData,1)
            returns three subsets of the complete matrix
            with randomized and optimized columns!

            [mTrain, mTest] = subset(mData,1,)
            returns two subsets





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`subset' splits the main data matrix which contains inputs and targets
into 2 or



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tansig


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 -- Function File:  A = tansig (N)
     `tansig' is a non-linear transfer function used to train neural
     networks.  This function can be used in newff(...) to create a new
     feed forward multi-layer neural network.





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`tansig' is a non-linear transfer function used to train neural
networks.



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train


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 -- Function File:  [NET] = train (MLPNET,MINPUTN,MOUTPUT,[],[],VV)
     A neural feed-forward network will be trained with `train'

          [net,tr,out,E] = train(MLPnet,mInputN,mOutput,[],[],VV);

          left side arguments:
            net: the trained network of the net structure `MLPnet'

          right side arguments:
            MLPnet : the untrained network, created with `newff'
            mInputN: normalized input matrix
            mOutput: output matrix (normalized or not)
            []     : unused parameter
            []     : unused parameter
            VV     : validize structure




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A neural feed-forward network will be trained with `train'




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trastd


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 -- Function File:  PN = trastd (P,MEANP,STDP)
     `trastd' preprocess additional data for neural network simulation.

            `p'    : test input data
            `meanp': vector with standardization parameters of prestd(...)
            `stdp' : vector with standardization parameters of prestd(...)

            meanp = [2.5; 6.5];
            stdp = [1.2910; 1.2910];
            p = [1 4; 2 5];

            pn = trastd(p,meanp,stdp);





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`trastd' preprocess additional data for neural network simulation.



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vec2ind


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 -- Function File: IND = vec2ind (VECTOR)
     `vec2ind' convert vectors to indices

          EXAMPLE 1
          vec = [1 2 3; 4 5 6; 7 8 9];

          ind = vec2ind(vec)
          The prompt output will be:
          ans =
             1 2 3 1 2 3 1 2 3





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`vec2ind' convert vectors to indices