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Top Forums Shell Programming and Scripting Save output of updated csv file as csv file itself Post 302939938 by Don Cragun on Tuesday 31st of March 2015 05:29:11 AM
Old 03-31-2015
Sorry, I didn't notice the heading line before. Doing a numeric sort, the string DateTimeOriginal evaluates to 0 and sorts before 2015; while doing an alphanumeric sort, numbers sort before letters. So, you need the -n option to make the heading come out first. If you use numeric sorting, you need to make the sort key more complex to use the each year, month, day, hour, minute, and second field separate keys to avoid just using the year as your sort key:
Code:
sort -n -k2.1,2.4 -k2.6,2.7 -k2.9,2.10 -k2.12,2.13 -k2.15,2.1 -k2.18,2.19 -o test.csv -t, test.csv

But with your data we can use numeric sorting for the year and use alphanumeric sorting for the month, day, hour, minute and second as a single field, which siimplifies the command to just:
Code:
sort -k2.1,2.4n -k2.6,2 -o test.csv -t, test.csv

Your relatively simple sort seems to work because the image numbers in your pathnames are monotonically increasing as the time stamp increases AND all of your image files are in a single directory. If your real image files could be in more than one directory, might have different numbers of digits in the sequence numbers, or might come from different cameras with different image ranges, one of the above sort commands should sort correctly by date and time for you.
This User Gave Thanks to Don Cragun For This Post:
 

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WRAP-AND-SORT(1)					      General Commands Manual						  WRAP-AND-SORT(1)

NAME
wrap-and-sort - wrap long lines and sort items in Debian packaging files SYNOPSIS
wrap-and-sort [options] DESCRIPTION
wrap-and-sort wraps the package lists in Debian control files. By default the lists will only split into multiple lines if the entries are longer than 80 characters. wrap-and-sort sorts the package lists in Debian control files and all .install files. Beside that wrap-and-sort removes trailing spaces in these files. This script should be run in the root of a Debian package tree. It searches for control, control.in, copyright, copyright.in, install, and *.install in the debian directory. OPTIONS
-h, --help Show this help message and exit. -a, --wrap-always Wrap all package lists in the Debian control file even if the entries are shorter than 80 characters and could fit in one line line. -s, --short-indent Only indent wrapped lines by one space (default is in-line with the field name). -b, --sort-binary-packages Sort binary package paragraphs by name. -k, --keep-first When sorting binary package paragraphs, leave the first one at the top. Unqualified debhelper(7) configuration files are applied to the first package. -n, --no-cleanup Do not remove trailing whitespaces. -d path, --debian-directory=path Location of the debian directory (default: ./debian). -f file, --file=file Wrap and sort only the specified file. You can specify this parameter multiple times. All supported files will be processed if no files are specified. -v, --verbose Print all files that are touched. AUTHORS
wrap-and-sort and this manpage have been written by Benjamin Drung <bdrung@debian.org>. Both are released under the ISC license. DEBIAN
Debian Utilities WRAP-AND-SORT(1)
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