Matlab中未定义的函数或变量“数字”

Question

 function parameter=CPTValues(index,sizes,CPTS)
   m=size(index,2);
   n=size(sizes,2);
   for i=m:1
       number=(round(index(1,i)-1))*arraySizes(sizes,n);
       n=n-1;
   end
   parameter=CPTS(round(number));
end

function arraySize=arraySizes(array,length)
   count=1;
    if (length>=2)
        for i=length-1:1
           count=count*round(array(1,i));
        end
        arraySize=round(count);
    else
        arraySize=1;
    end
end

Hi all, I try to write a function in Matlab to refer to a value in a multi-dimensional Matrix. When I have this function, and I try to pass the index=[2,1,2], sizes=[3,2,2] BP(a 3-dimensional matrix I have already defined) into my CPTValues function, I get the error:

"Undefined function or variable "number" "

Is there anybody here could help me with that, Thanks a lot~

here is a example of the CPTs %P_\\theta(HD|CH,BP,G)

  HD=zeros(2,2,2,2);
  for i=1:m
      for ch=1:2
          for bp=1:2
              for g=1:2
                for hd=1:2
                    if(Data(i,5)==ch&&Data(i,4)==bp&&Data(i,2)==g&&Data(i,9)==hd)
                        HD(ch,bp,g,hd)=HD(ch,bp,g,hd)+1;
                    end
                end
            end
        end
    end
end
PCBG=zeros(2,2,2);
for i=1:m
    for ch=1:2
        for bp=1:2
            for g=1:2
                if(Data(i,5)==ch&&Data(i,4)==bp&&Data(i,2)==g)
                    PCBG(ch,bp,g)=PCBG(ch,bp,g)+1;
                end
            end
        end
    end
end

for ch=1:2
    for bp=1:2
        for g=1:2
            HD(ch,bp,g,:)=HD(ch,bp,g,:)/PCBG(ch,bp,g);
        end
    end
end

Answer 1

The for goes from i=m:1 , but matlab does not understand that i must decrease instead of increase! change the for line to for i=m:-1:1 , it will do it.

EDIT2:

It works ok for me:

%Create random BP of sizes=[3,2,2]
BP=rand(sizes)
BP(:,:,1) =
    0.9572    0.1419
    0.4854    0.4218
    0.8003    0.9157
BP(:,:,2) =
    0.7922    0.0357
    0.9595    0.8491
    0.6557    0.9340
%Set an index to look
index=[2,1,2];
%try the function
CTPValues(index,sizes,BP)
    ans =
        0.9572
%try indexing the matrix directly
BP(2,1,2)
  ans =
    0.9595