MATLAB: Trying to convert string to number but the last number is not converting. What am I doing wrong in the code? The problem is B(j)=str2num(B(j)) row.

nb

function [n_prn]=findPRN(SATXYZ2A)
    SAT=[SATXYZ2A(:,[12:221])];
    [Row,Col] = size(SAT);
%Eliminate data which is not GPS
for i = 1:10:Col
    String_temp = (SAT{1,i});
    if  not(strcmp(String_temp,'GPS'))
    break;
    end
end
    SAT = [SAT(:,[1:i-1])];
    A = dataset2cell (SAT);
    A(1,:)=[];
    [Row,Col] = size(A);
    B=[A(1,[2:10:Col])];
    [Row,Col] = size(B);
    for j=1:Col
        if ischar(B{j})
             B(j)= str2num(B(j));
        end
    end
    B = cell2mat(B);
    n_prn=transpose(B);
end

Best Answer

For a start it should be
B{j} = str2num(B{j});
and I would recommend using str2double instead of str2num. Given the right(?) input str2num could format your hard drive or do all kind of nefarious things.
B{j} = str2double(B{j});
In any case, are you sure that B{j} actually contains something that can be decoded as a number when it is text?
Note:
   [Row,Col] = size(A);
    B=[A(1,[2:10:Col])];
None of the square brackets are needed in the second line and the whole lot could be written more simply as
B = A(1, 2:10:end);
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