Settings for readtable for date and timestamp columns

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Purnendu Nath
Purnendu Nath 2019-5-23
编辑： per isakson 2019-5-23
I have a CSV file that looks like this and I want to use readtable() to load up the Date and Time columns so that they are numerical. (rather than 'cell' or 'string').
Is there a set of options for doing that in readtable? I know I can loop programmatically and convert each entry from char/string with datenum but want to avoid that overhead.
I have tried
T = readtable( filename, 'Delimiter', ',' ...
, 'HeaderLines', 0 ...
, 'ReadVariableNames', true ...
, 'Format', '%s%s%s%f%f' ...
, 'FileType', 'text' ...
, 'ReadRowNames', false ...
, 'TreatAsEmpty','N/A' ...
, 'TextType', 'string' ...
, 'DatetimeType', 'datetime' )
Ticker Date Time BuyPrice SellPrice
ACC-II.NFO 15/05/2019 10:10:04 1582.9 1588.95
ACC-II.NFO 15/05/2019 10:10:04 1582.9 1588.95
ACC-II.NFO 15/05/2019 10:10:04 1582.9 1588.95
ACC-II.NFO 15/05/2019 10:10:04 1582.9 1588.95
ACC-II.NFO 15/05/2019 10:10:16 1584 1588.35
  2 个评论
Walter Roberson
Walter Roberson 2019-5-23
Which MATLAB release are you using? Dealing with times got easier in recent releases.
Is it really necessary that you use numeric entries for those? Most of the time it makes more sense to combine the date and time into a single datetime object.
Purnendu Nath
Purnendu Nath 2019-5-23
Thanks Walter... I have decided to use
T.Time = frac(datenum(T.Time, 'hh:MM:ss'))
and
T.Date = datenum(T.Date,'dd/mm/yyyy')
and then may use datetime.

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