How to understand this code segment

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tejasvee 2017-4-2

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https://ww2.mathworks.cn/matlabcentral/answers/333193-how-to-understand-this-code-segment

编辑： Stephen23 2017-4-2

I have this code segment, how to understand this

train_data=load(TrainingData_File);
T=train_data(:,1)';
P=train_data(:,2:size(train_data,2))';
clear train_data;                                   %   Release raw training data array
NumberofTrainingData=size(P,2);
NumberofInputNeurons=size(P,1);
if Elm_Type~=REGRESSION
    %%%%%%%%%%%%Preprocessing the data of classification
    sorted_target=sort(T,2);
    label=zeros(1,1);                               %   Find and save in 'label' class label from training and testing data sets
    label(1,1)=sorted_target(1,1);
    j=1;
    for i = 2:NumberofTrainingData
        if sorted_target(1,i) ~= label(1,j)
            j=j+1;
            label(1,j) = sorted_target(1,i);
        end
    end
    number_class=j;
    NumberofOutputNeurons=number_class;