Problem with convolutionUnit function

Hello everyone, i wanted to creat a resnet 50 but i get this error:

Unrecognized function or variable

'convolutionalUnit'.

What should i do please?

netWidth = 16;
layers = [
    imageInputLayer([224 224 3],'Name','input')
    
    convolution2dLayer(3,netWidth,'Padding','same','Name','convInp')
    
    batchNormalizationLayer('Name','BNInp')
    
    reluLayer('Name','reluInp')
   
    convolutionalUnit(netWidth,1,'S1U1')
    additionLayer(2,'Name','add11')
    reluLayer('Name','relu11')
    convolutionalUnit(netWidth,1,'S1U2')
    additionLayer(2,'Name','add12')
    reluLayer('Name','relu12')
    
    convolutionalUnit(2*netWidth,2,'S2U1')
    additionLayer(2,'Name','add21')
    reluLayer('Name','relu21')
    convolutionalUnit(2*netWidth,1,'S2U2')
    additionLayer(2,'Name','add22')
    reluLayer('Name','relu22')
    
    convolutionalUnit(4*netWidth,2,'S3U1')
    additionLayer(2,'Name','add31')
    reluLayer('Name','relu31')
    convolutionalUnit(4*netWidth,1,'S3U2')
    additionLayer(2,'Name','add32')
    reluLayer('Name','relu32')
    
    averagePooling2dLayer(8,'Name','globalPool')
    
    fullyConnectedLayer(2,'Name','fcFinal')
    
    softmaxLayer('Name','softmax')
    
    classificationLayer('Name','classoutput')
    ];
    

Answer 1

[Abhishek Gupta]

Hi,

You are getting this error because MATLAB doesn't recognize the 'convolutionalUnit' as the name of a function on the MATLAB path (see this for more details related to the error message). You can resolve this issue by adding the 'convolutionalUnit' function in your MATLAB path. You can find the code for this function in the documentation link below (just above the references section):-

Train Residual Network for Image Classification

For your convenience, I am also copy-pasting the code here: -

function layers = convolutionalUnit(numF,stride,tag)
layers = [
    convolution2dLayer(3,numF,'Padding','same','Stride',stride,'Name',[tag,'conv1'])
    batchNormalizationLayer('Name',[tag,'BN1'])
    reluLayer('Name',[tag,'relu1'])
    convolution2dLayer(3,numF,'Padding','same','Name',[tag,'conv2'])
    batchNormalizationLayer('Name',[tag,'BN2'])];
end

[Hind Haboubi]

Thank you