Comma Separated Imported Data
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I have a csv file that is separated by commas without spaces and with will not be separated into multiple variables. Is there something I can do in Matlab? I tried tooling with the delimiter options but to no evail, thank you (I have attached one of the files).
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Walter Roberson
2018년 6월 13일
S = fileread(FileName);
S(S == '"') = [];
fmt = '%f%f%f%f%f%f';
data = cell2mat( textscan(S, fmt, 'HeaderLines', 1, 'Delimiter', ',', 'CollectOutput', true) );
Now data is a numeric array with 6 columns.
Potentially you might want to use
dd = data(:,1:4);
dd(:,5:6) = 0; %add minutes and seconds column
dt = datetime(dd);
Now dt would express the dates and times as datetime objects. That can be useful in analysis, such as
Wind_Direction = data(:,5);
Windspeed = data(:,6);
T = timetable(Wind_Direction, Windspeed, 'Rowtimes', dt);
and then you can do things like
retime(T, 'daily')
which would give you the daily average wind direction and windspeed.
(However, this in itself would not know about wrapping directions at 360 so the average wind direction could be wrong, such as near 2016,01,24,00)
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Jan
2018년 6월 13일
Remove the double quotes at first:
S = fileread(FileName);
S(S == '"') = [];
fid = fopen(FileName, 'w');
fwrite(fid, S, 'char');
fclose(fid);
Then the standard tools should word: readtable, csvread, sscanf, textscan.
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Walter Roberson
2018년 6월 13일
... That is the implementation, other than the fact that you would proceed from there to
T = readtable(FileName);
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