MATLAB: Extreme learning machine multi-class classification

extreme learning machine

i am using the attached code for the multiclass classification. but i am getting error <Undefined function or variable 'getRandomMatrix'.
Error in trainRELM (line 70)
R = getRandomMatrix(size(Data.X,2)+1,nh,type,Params.seed);
Error in test1 (line 47)
LR2 = trainRELM(DataTG);>
kindly help me to understand the reason for why the error is coming like this.
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