Separate 24 digits single array of data loaded from file into 6 different arrays

Question

Luis Felipe Brunhara 2021-9-1

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1444699-separate-24-digits-single-array-of-data-loaded-from-file-into-6-different-arrays

评论： Luis Felipe Brunhara 2021-9-1

So I have a datalogger saving into a file data from 6 diferent sensors with this format:

504800002206203200000000
504800002205203000000000
504800002205203000000000
507000002206202900000000
507000002206203000000000
504200002205203200000000
504200002206203100000000
504200002205203200000000
504200002208203100000000
504200002204203200000000
500400002205203000000000

Where Each 4 Digits is equivalent to a singe data, for a total of 24 digits (6*4) per line.

I want to split this into 6 variables (one for each sensor data).

I came up with a code that does that, but it is too slow. Does anybody have an suggestion on how to improve it?

%===|Converte em String|===

d = textscan(fid,'%s');

fclose(fid);

dados = d{1,1};

%===|Converte a String em Dados|===

for i=1:length(dados)

dados{i,1} = split(dados{i,1},"");

dados{i,2} = str2double(sprintf('%s%s%s%s',dados{i,1}{6,1}, dados{i,1}{7,1}, dados{i,1}{8,1}, dados{i,1}{9,1}));

dados{i,3} = str2double(sprintf('%s%s%s%s',dados{i,1}{10,1}, dados{i,1}{11,1}, dados{i,1}{12,1}, dados{i,1}{13,1}));

dados{i,4} = str2double(sprintf('%s%s%s%s',dados{i,1}{14,1}, dados{i,1}{15,1}, dados{i,1}{16,1}, dados{i,1}{17,1}));

dados{i,5} = str2double(sprintf('%s%s%s%s',dados{i,1}{18,1}, dados{i,1}{19,1}, dados{i,1}{20,1}, dados{i,1}{21,1}));

dados{i,6} = str2double(sprintf('%s%s%s%s',dados{i,1}{22,1}, dados{i,1}{23,1}, dados{i,1}{24,1}, dados{i,1}{25,1}));

dados{i,1} = str2double(sprintf('%s%s%s%s',dados{i,1}{2,1}, dados{i,1}{3,1}, dados{i,1}{4,1}, dados{i,1}{5,1}));

end

dados = cell2mat(dados);

%===|Salva os Dados em Variaveis|===

rot = dados(:,1);

vel = dados(:,2);

anlg0 = dados(:,3);

anlg1 = dados(:,4);

tempAmb = dados(:,5);

tempObj = dados(:,6);

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Answer 1

Simon Chan 2021-9-1

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1444699-separate-24-digits-single-array-of-data-loaded-from-file-into-6-different-arrays#answer_778814

在 MATLAB Online 中打开

Try the following by converting the text using function num2cell.

clear; clc;
fid = fopen('data.txt');
d = textscan(fid,'%s');
data = cat(1,d{:});
dataexpand = cellfun(@num2cell,data,'UniformOutput',false);
alldata = cat(1,dataexpand{:});
%
rot = str2double(string(cell2mat(alldata(:,1:4))))
vel = str2double(string(cell2mat(alldata(:,5:8))))
anlg0 = str2double(string(cell2mat(alldata(:,9:12))))
anlg1 = str2double(string(cell2mat(alldata(:,13:16))))
tempAmb = str2double(string(cell2mat(alldata(:,17:20))))
tempObj = str2double(string(cell2mat(alldata(:,21:24))))