function y=zctezheng(x)
lengthofx=size(x);
rowlengthofx=lengthofx(1);
y=zeros(rowlengthofx,32);
% for i=1:rowlengthofx
%     for j=1:31
%         y(i,j)=x(i,j)-x(i,j+1);                   
%     end
% end
for i=1:rowlengthofx
    maxsub=max(x(i));    %最大下標(biāo)
    minofXright=(x(1:maxsub));%下標(biāo)右側(cè)的最小
    slopeofXright=zeros(1,maxsub);%斜率的數(shù)組
    for j=2:maxsub(1)
        slopeofXright(j)=x(i,j)-x(i,j-1);%求各個斜率
    end
end