Matlab中从数据文件文本中提取数值数据
我有一个.txt数据文件,它的开头有几行文本注释,后面是实际数据的列。它看起来像这样:Matlab中从数据文件文本中提取数值数据,matlab,text,import,cell,cell-array,Matlab,Text,Import,Cell,Cell Array,我有一个.txt数据文件,它的开头有几行文本注释,后面是实际数据的列。它看起来像这样: lens (mm): 150 Power (uW): 24.4 Inner circle: 56x56 Outer Square: 256x320 remarks: this run looks good 2.450000E+1 6.802972E+7 1.086084E+6 1.055582E-5 1.012060E+0 1.036552E+0 2.400000E+1 6.86659
lens (mm): 150
Power (uW): 24.4
Inner circle: 56x56
Outer Square: 256x320
remarks: this run looks good
2.450000E+1 6.802972E+7 1.086084E+6 1.055582E-5 1.012060E+0 1.036552E+0
2.400000E+1 6.866599E+7 1.088730E+6 1.055617E-5 1.021491E+0 1.039043E+0
2.350000E+1 6.858724E+7 1.086425E+6 1.055993E-5 1.019957E+0 1.036474E+0
2.300000E+1 6.848760E+7 1.084434E+6 1.056495E-5 1.017992E+0 1.034084E+0
通过使用importdata
,Matlab自动分离文本数据和实际数据。但是如何从文本(以单元格格式存储)中提取这些数字数据呢?我想要实现的目标是:
1是最重要的,2或3是可选的。如果可以简化代码,我也很乐意更改文本注释的格式。假设您的示例数据保存为
demo.txt
,您可以执行以下操作:
function q47203382
%% Reading from file:
COMMENT_ROWS = 5;
% Read info rows:
fid = fopen('demo.txt','r'); % open for reading
txt = textscan(fid,'%s',COMMENT_ROWS,'delimiter', '\n'); txt = txt{1};
fclose(fid);
% Read data rows:
numData = dlmread('demo.txt',' ',COMMENT_ROWS,0);
%% Processing:
desc = cell(5,1);
unit = cell(2,1);
quant = cell(5,1);
for ind1 = 1:numel(txt)
if ind1 <= 2
[desc{ind1}, unit{ind1}, quant{ind1}] = readWithUnit(txt{ind1});
else
[desc{ind1}, quant{ind1}] = readWOUnit(txt{ind1});
end
end
%% Display:
disp(desc);
disp(unit);
disp(quant);
disp(mat2str(numData));
end
function [desc, unit, quant] = readWithUnit(str)
tmp = strsplit(str,{' ','(',')',':'});
[desc, unit, quant] = tmp{:};
end
function [desc, quant] = readWOUnit(str)
tmp = strtrim(strsplit(str,': '));
[desc, quant] = tmp{:};
end
(为了便于查看,我随意对输出进行了一些格式化。)
另请参见:.可能的副本