Conversion to struct from double is not possible- Neural Network Pattern Recognition Toolbox

Hello. I'm trying to execute the simplest example for Pattern recognition network, given in this link http://www.mathworks.fr/fr/help/nnet/ref/patternnet.html for iris flowers classification.

 [x,t] = iris_dataset;
net = patternnet(10)
net = train(net,x,t);
view(net)
y = net(x);
perf = perform(net,t,y)
classes = vec2ind(y)

Error using struct Conversion to struct from double is not possible.

And it's the same error if I use the Neural Network interface. Can anyone help me, please? Thank you very much!

[Jan]

Please be so kind and post the complete error message. Most of all show us the line, which causes the error and explain the type of the used variables.

[Don Mathis]

When I cut and paste his code (on a mac running R2014a and MacOS 10.9.3), I get this error:

Error using struct
Conversion to struct from double is not possible.
Error in network/subsasgn>getDefaultParam (line 2048)
    param = struct(feval(fcn,'defaultParam'));
Error in network/subsasgn>setLayerTransferFcn (line 1224)
net.layers{i}.transferParam = getDefaultParam(transferFcn);
Error in network/subsasgn>network_subsasgn (line 208)
        if isempty(err), [net,err] =
        setLayerTransferFcn(net,i,transferFcn); end
Error in network/subsasgn (line 13)
net = network_subsasgn(net,subscripts,v,netname);
Error in patternnet>create_network (line 104)
  net.layers{net.numLayers}.transferFcn = 'softmax';
Error in patternnet (line 71)
    net = create_network(param);

[Don Mathis]

I discovered that the cause of my replication of your error was the fact that I had redefined the 'softmax' function in my MATLAB workspace. There are a number of functions that would cause this error if you redefine them, such as: netsum purelin tansig dividerand mse adaptwb learngdm crossentropy softmax

[LuMig]

Also my case.Thumbs up

Answer 1

[Greg Heath]

I cut and pasted your code. It ran with no problem or messages.

Answer 2

[MHS]

I faced similar problem and it was resolved by resetting the workspace path list to default.

Answer 3

[ahmad ali mohammad]

I was faced with the same problem When I run certain code occurs after you run this code I have to remove and re-install MATLAB

[kh rezaee]

I have this problem, too. Please help me.

Answer 4

[Afonso Costa]

I found a solution for this problem. I think it is clashing with another function you may have.

To solve, go to Environment > Set Path, then move all the directories you included (from other toolboxes) to the end of the entries.

For me, worked like a charm!