Machine learning, Neural network with data in array format

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George Suarez
George Suarez 2022-2-10
回答： yanqi liu 2022-2-18
Hi,
New to using NN in matlab. I'm looking to classify some data. Each event is contained in a 35x3 array. I have around 10k events so the matrix is 35x3x10000. The predictor is 10000x1 with values 0 or 1. I looked at the documentation and examples, but is not clear to me how I build and feed this data into the NN.
I'm doing this to classify simulation data for a neutron instrument. The events can be single or double scatter. Any help (and patience) will be greatly appreciated.
Rgds,
George

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回答（2 个）

KSSV
KSSV 2022-2-10
  1 个评论
George Suarez
George Suarez 2022-2-10
编辑：George Suarez 2022-2-10
Thanks. I tried it before posting and didn't work. I'm sure is me no understanding how to configure the CNN.
%trainD is a 35x3x10000 array
trainDtarget = categorical(trainDtarget'); %10000x1 array
layers = [
imageInputLayer([size(trainD,1) size(trainD,2) 1])
convolution2dLayer(8,3,'Padding','same')
batchNormalizationLayer
reluLayer
maxPooling2dLayer(2,'Stride',2)
convolution2dLayer(3,16,'Padding','same')
batchNormalizationLayer
reluLayer
maxPooling2dLayer(2,'Stride',2)
convolution2dLayer(3,32,'Padding','same')
batchNormalizationLayer
reluLayer
fullyConnectedLayer(2)
softmaxLayer
classificationLayer];
options = trainingOptions('sgdm', ...
'InitialLearnRate',0.01, ...
'MaxEpochs',4, ...
'Shuffle','every-epoch', ...
'ValidationData',table(trainDtarget), ...
'ValidationFrequency',30, ...
'Verbose',false, ...
'Plots','training-progress');
net = trainNetwork(trainD,trainDtarget,layers,options);
I get an error
Error using trainNetwork (line 184)
Invalid network.
Caused by:
Layer 9: Input size mismatch. Size of input to this layer is different from the expected input size.
Inputs to this layer:
from layer 8 (size 17(S) × 1(S) × 16(C) × 1(B))

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yanqi liu
yanqi liu 2022-2-18
yes，sir，may be upload your data mat file to analysis，or check
https://ww2.mathworks.cn/matlabcentral/answers/1649260-how-to-train-cnn-on-custom-dataset-in-matrix-form
make cnn model by the input data dimension

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