Re: Prepending Data to a File
- To: mathgroup at smc.vnet.net
- Subject: [mg116838] Re: Prepending Data to a File
- From: David Annetts <david.annetts at iinet.net.au>
- Date: Wed, 2 Mar 2011 04:33:13 -0500 (EST)
Hi Gregory,
This is something I'd be doing from a command line
copy newstuff+oldstuff oldstuff
D.
On 1/03/2011 18:20, Gregory Lypny wrote:
> Hello everyone,
>
> I have a big multi-line, comma-delimited data file. How would I prepend
> new data to it, that is, insert new lines, generated in Mathematica, at
> the beginning of the file without importing the file into Mathematica?
>
> Suppose my file myData.csv contains
>
> 31,32,33
> 41,42,43
> 51,52,53
>
> and I've now generated these two new lines (lists) in Mathematica
>
> 11,12,13
> 21,22,23
>
> I'd like to prepend those two lines to myData and end up with
>
> 11,12,13
> 21,22,23
> 31,32,33
> 41,42,43
> 51,52,53
>
> I'm guessing that the Write function would do the trick, but I'm not
> sure about the syntax.
>
> Regards,
>
> Gregory
>
>