Too many output arguments

hi, i newbie to matlab i am creating a very simple feed forward network, but i keep getting the too many output arguments error. what can i do?

Answer 1

[Star Strider]

Without knowing what ‘dataset’ is, although assuming that it is an array with 2 columns, try this:

Input = dataset(:,1);
Target = dataset(:,2);

Note that the dataset class is a collection of functions for constructing Dataset Arrays.

[Ditf]

ah what if it has 11 columns and the first 10 are the input and the last colomn is the output

[Star Strider]

In that case:

Input = dataset(:,1:10);
Output = dataset(:,11);

or equivalently:

Input = dataset(:,1:end-1);
Output = dataset(:,end);

.

[Ditf]

i have done what you suggested but i still get 'input and target have different number of samples', can you help?

[Image Analyst]

Well this is a different dataset than the first time you asked. Please attach the breastcancer.mat file.

In the meantime, input has 10 columns while target has 1 columns. It says they need the same number of samples. Can you take just one of the columns of input

inputColumn = breastcancer(:, 1); % Take column 1.

Do NOT use input as the name of your variable since that is a built-in function that you do not want to blow away.

[Ditf]

the dataset i am using is https://archive.ics.uci.edu/ml/datasets/breast+cancer+wisconsin+(original)

it needs all 10 attributes as inputs to make that one output

what can i do?

[Star Strider]

Assuming you need to use ‘breast-cancer-wisconsin.data’, the way I chose to import it is:

opts = detectImportOptions('breast-cancer-wisconsin.data', 'FileType','text');
BCTable = readtable('breast-cancer-wisconsin.data', opts);

InputVariables = BCTable(:,1:10);
OutputVariable = BCTable(:,11);

and that appears to work.

Examing the imported file with:

FirstFiveRows = BCTable(1:5,:)

produces:

FirstFiveRows =

  5×11 table

     Var1      Var2    Var3    Var4    Var5    Var6    Var7    Var8    Var9    Var10    Var11
    _______    ____    ____    ____    ____    ____    ____    ____    ____    _____    _____

    1000025     5       1       1       1       2        1      3       1        1        2  
    1002945     5       4       4       5       7       10      3       2        1        2  
    1015425     3       1       1       1       2        2      3       1        1        2  
    1016277     6       8       8       1       3        4      3       7        1        2  
    1017023     4       1       1       3       2        1      3       1        1        2  

.

[Ditf]

yes it work but when i try to configure the network i get the error that the input data is not a matrix or cell array.

[Star Strider]

Try this to create a matrix from them:

InputVariables = table2array(BCTable(:,1:10));
OutputVariable = table2array(BCTable(:,11));

See the documentation on table2array for details on the function. You can also use table2cell, linked to in the table2array documentation, if you want them as a cell array instead.

[Ditf]

Thank you so much for your help, i greatly appreciate it.

[Star Strider]

As always, my pleasure!