You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: bptest.m
    path of file: ./repos/Algorithms_MathModels/《MATLAB图像处理》源文件/本书源文件/chap15
    
    the code of the file until where you have to start completion: function c=bptest(p,q,n,w,v,theta,r,X)
%p,q,n表示输入层、中间层和输出层神经元个数

    
function c=bptest(p,q,n,w,v,theta,r,X)
%p,q,n表示输入层、中间层和输出层神经元个数
%w，v表示训练好的神经网络输入层到中间层、中间层到输出层权值。
%X为输入测试的模式
%c表示模式X送入神经网络的识别结果。
%计算中间层的输入Y(j) 
Y=X*w; 
%计算中间层的输出b
Y=Y-theta;    %中间层阈值
for j=1:p
    b(j)=1/(1+exp(-Y(j)));%中间层输出f(sj)
end