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POSeparate one large CSV file in smaller files based on the first column in bash
 

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    <p>I have several large CSV files (~20 MiB each) containing information as the following. I would like to find a way to separate this file into smaller files based on the date in the first column. For example: the following segment will be separated into 2 files, namely <code>20130719.csv</code> and <code>20130720.csv</code>.</p> <p>I also would like to sort (within each smaller files) according to the 4th column (the color tag). Does anyone has any suggestions on how I can do this ? </p> <p>Are there things I should learn about when dealing with these types of stuff? </p> <pre><code>19/07/2013 19:14:24:523 6.35099E+17 Dr_Blue 10.42496014 27.17010689 0.685520172 19/07/2013 19:18:5:903 6.35099E+17 Dr_Yellow 11.09363079 28.57788467 2.010284424 19/07/2013 19:36:33:645 6.35099E+17 Dr_Blue 10.77513885 28.3723774 1.897870064 19/07/2013 21:29:36:762 6.35099E+17 Dr_Yellow 10.64018059 28.56962967 1.117245913 19/07/2013 21:29:37:627 6.35099E+17 Dr_Yellow 11.3354435 27.57170868 1.552354813 20/07/2013 2:34:28:2 6.35099E+17 Dr_Yellow 10.41067123 26.84050369 0.919301987 20/07/2013 2:34:28:840 6.35099E+17 Dr_Yellow 10.54369164 27.17712402 0.573934555 20/07/2013 2:34:33:192 6.35099E+17 Dr_Yellow 10.98471832 28.35677719 1.497600555 20/07/2013 4:20:28:246 6.35099E+17 Dr_Blue 10.92816448 28.55761147 2.187088013 </code></pre>
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    1. USJonathan Leffler
    1. UScyc115
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      1. VTDownMod
    1. COthings you should learn/check: Make sure you have 2-3 x free diskspace? ;-) Good luck.
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      1. USshellter
    2. CO`man awk` and `man sort`
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      1. USFredrik Pihl
 

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