getting data from an array correctly
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Hi, I have the following data that I get it from the socket
header = [53 0 1 2 3 4 5 6 7 8 9 53 1 24 59 5 95 95 53 2 59 58 575 75 53 0 1 4 2 4 9 1];
The header first starts with 53, then maybe 0 or 1 or 2. so I need to get the bytes after 53 + 0 till the next 53 ( in between) and also get the data after 53 + 1 till the next 53 and so on
I tried that but it crashes
header = [53 0 1 2 3 4 5 6 7 8 9 53 1 24 59 5 95 95 53 2 59 58 575 75 53 0];
where = find(header == 53);
if numel(where) > 1 && header(where(1)+1) == 1 % check if there are more then 1 53s and number after first 53 is 0.
nextbytes = header(where(1)+2:where(2)-1);
disp(nextbytes);
end
4 个评论
Walter Roberson
2018-5-24
If the data itself included a 53, then how would that be coded?
What do you want to do in the case of a 53 followed by something that is not a 0, 1, or 2 ?
Ahmed Tolba
2018-5-24
dpb
2018-5-24
Is it possibly data, though, even if not new record marker?
A formal description of the protocol would be more beneficial, methinks.
Ahmed Tolba
2018-5-24
采纳的回答
Walter Roberson
2018-5-24
where = [find(header(1:end-1)==53 & ismember(header(2:end), [0 1 2 3])), length(header)+1];
lengths = diff(where);
bytesplits = mat2cell(header(where(1):end), 1, lengths);
bytesplits is now a cell array in which each entry is a vector starting with an appropriate header.
3 个评论
Ahmed Tolba
2018-5-24
Ahmed Tolba
2018-5-24
Walter Roberson
2018-5-24
for K = 1 : length(bytesplits)
plot(bytesplits{K}(3:end), 'DisplayName', sprintf('#%d', K));
hold on
end
hold off
legend('show');
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