MATLAB: Neural network and get data from workspace

Deep Learning Toolboxneural net pattern recognition toolboxselect data

Hi, From the neural net pattern recognition toolbox, at the Select data window, in the get data from workspace I can not choose the input (stays at "none") EVEN though I have tables in my workspace. There seems to have nothing to choose from. From documentation it seems a relative simple and streamline process. I have 2 tables with numeric and categorical data: The first for X data and the other the Y. Any clues. Thanks.

Best Answer

Hi Michel,

I assume you are using Neural Network Pattern Recognition Tool and you want to import some training data. You cannot import data from tables directly.

However if you have to train your network on two features, you can create a matrix for the same.

For example,

    a=1:10;   % 1st feature vector
    b=3:13;   % 2nd feature vector
    c=[a;b];  
    d=[0 1 1 0 1 1 0 0 1 0]; % target vector

Now you can import variable 'c' in the workspace as Inputs and 'd' as targets in the GUI.

Also note that you select samples are 'Matrix Columns'.

Related Solutions

MATLAB: Does the Neural Network Pattern Recognition Tool GUI not list the workspace variable for target data in Neural Network Toolbox 7.0.3 (R2012a)

The target variable for Neural Network Pattern Recognition Tool in Neural Network Toolbox 7.0.3 (R2012a) needs to be a matrix of ones or zeros indicating which class the corresponding input belongs to. For example, the variable could be as follows:

>> target_var=[ 1 0 0 0;
              0 0 1 0;
              0 1 0 1];

where first column represents class 1; second column means class 3, and so on.

In case you need to convert your already defined class matrix (one-

dimensional) to a matrix of appropriate ones and zeros, you can do it as follows:

>>  ind = [1 3 2 3] ;
>> vec = ind2vec(ind) ;
>> target_var = full(vec) 
ans = 
       1     0     0     0 
       0     0     1     0 
       0     1     0     1

which you can then use as variable for your "Targets".

You can also have a look at the variables which were used in the Example Data Sets. Please click "Load Example Data Set". The Pattern Recognition Data Set Chooser window opens. Choose a data set, for example. "Breast Cancer", and click Import. You can then view these variables in the workspace.

MATLAB: How to store weights after neural network training

 help getwb
 doc  getwb
 help setwb
 doc setwb
 Search both the NEWSGROUP and ANSWERS using either or both of getwb and setwb.

Hope this helps.

Thank you for formally accepting my answer

Greg

Best Answer

Related Solutions

MATLAB: Does the Neural Network Pattern Recognition Tool GUI not list the workspace variable for target data in Neural Network Toolbox 7.0.3 (R2012a)

MATLAB: How to store weights after neural network training

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