Column labels with source names

2017 6 1
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更新时间：2017 6 19
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Hi, i have a file like attached. I'd like to show each source name in each column of results (For example If I calculate mean value). Could you tell me how to do? I know I can use fprintf but don't know how Thanks, regards

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Stephen23
Stephen23 2017-6-1
编辑：Stephen23 2017-6-1
@Julio Martín: you uploaded a PDF, but a PDF is useless for us. We cannot import PDF data, so we cannot test any code using your PDF. No one will sit and copy out those values by hand, so if you want help then please upload the original text file.
Jan
Jan 2017-6-1
"Each source name in each coumn of results" - but what are the "results"? What is the connection to fprintf? Do you want to pint something to a file?
What do you want to achieve? Please explain this exactly.
Julio Martín
Julio Martín 2017-6-2
Hi, I have already changed the file. I mean when I calculate results (mean, max, etc.). If I have eight channel results, I'd like to show source name Hope I've explained better. Thanks, regards
Walter Roberson
Walter Roberson 2017-6-2
You have 8 numeric columns. Should we assume that each column is one channel? At the top you have 8 lines under the source name header: should we assume that those 8 lines are the channel names?
Will the files always have 8 source names and 8 columns?
Julio Martín
Julio Martín 2017-6-18
Hi yes, each column is one channel, and yes, those 8 lines are the channel names Thanks

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Walter Roberson
Walter Roberson 2017-6-18

0 个投票

filename = 'BES30_1.txt';
nvars = 8;
fid = fopen(filename, 'rt');
if fid < 0; error('Could not open file "%s"', filename); end
failed_step = false;
while true
thisline = fgetl(fid);
if ~ischar(thisline); failed_step = true; break; end %end of file
if strcmpi(thisline, '[SOURCE NAMES]'); break; end
end
if failed_step; fclose(fid); error('No [SOURCE NAMES] in file'); end
channel_names = cell(1, nvars);
failed_step = false;
for K = 1 : nvars
thisline = fgetl(fid);
if ~ischar(thisline); failed_step = true; break; end %end of file
if isempty(thisline); failed_step = true; break; end %unexpected blank line
channel_names{K} = thisline;
end
if failed_step; fclose(fid); error('Not enough column names in file'); end
failed_step = false;
while true
thisline = fgetl(fid);
if ~ischar(thisline); failed_step = true; break; end %end of file
if strcmpi(thisline, '[DATA]'); break; end
end
if failed_step; fclose(fid); error('No [DATA] in file'); end
fmt = repmat('%f', 1, nvars);
data = cell2mat( textscan(fid, fmt, 'CollectOutput', 1) );
fclose(fid);
data_mean = mean(data);
data_max = max(data);
data_min = min(data);
channel_name_width = max( cellfun(@length, channel_names) );
name_fmt = repmat( sprintf('%%%ds ', channel_name_width), 1, nvars );
name_fmt(end-1:end) = '\n';
data_fmt = repmat( sprintf('%%%.dg ', channel_name_width), 1, nvars );
data_fmt(end-1:end) = '\n';
fprintf(name_fmt, channel_names{:});
fprintf(data_fmt, data_min);
fprintf(data_fmt, data_max);
fprintf(data_fmt, data_mean);

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Julio Martín
Julio Martín 2017-6-19
I thought it was easier Thank you!
Walter Roberson
Walter Roberson 2017-6-19
If the number of lines before each major section is fixed then this could be made notably shorter. Also, part of the length is in error checking.

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