Re: Deleting charachter from a text file
- To: mathgroup at smc.vnet.net
- Subject: [mg68186] Re: Deleting charachter from a text file
- From: "Giacomo Ciani" <giacomo.ciani at gmail.com>
- Date: Thu, 27 Jul 2006 05:30:12 -0400 (EDT)
- References: <ea722g$k1n$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Thanks, but this solution is not feasable for me. I'm running a
simulation and one of the reason of writing directly on the file "step
by step" the results is not to fill the memory, because I'm genearting
a lot of data.
Just for curiosity, I'm going to explain the problem in details...
actually, what i'm doing is something like:
OpenWrite[file]
WriteString["{{zeroArray}"]
Do[
...calculations...
WriteString[file,","]
Write[file, stepResultArray]
]
WriteString["}"]
taht is, I'm writing a list of "resultArrays". But as you can see, my
list is not coled by the "}" character till the simulation has ended.
What I would like to do is to close the list with the "}" at every
step, and the on the next step (after "...calculations...") reopen it,
add the new element, and close it again. This way I should be able to
import the file in another Mathematica program at any time, even if the
simulation is not ended...
Bye, and thanks again
Giacomo
Jens-Peer Kuska wrote:
> Hi,
>
> you must open the file, read the contents in the memory
> and save the changed contents.
>
> Any editor keep the file contents in memory
> (atleast partial) and you should do this also.
>
> Regards
> Jens
>
> "Giacomo Ciani" <giacomo.ciani at gmail.com> schrieb
> im Newsbeitrag news:ea4jva$sck$1 at smc.vnet.net...
> | Hello,
> |
> | I'm using direct access to text files to save
> data my program
> | generates. So I use a syntax like:
> |
> | OpenWrite[file];
> | WriteString[file,"text"];
> | ...
> | WriteString[file,"text2"];
> | ...
> | Ecc...
> | Close[file]
> |
> | I would like to be able to remove some
> characters (i.e. the last two
> | characters) from the file before writing new
> ones (as an example, I
> | could need to remove the "xt" character of the
> word "text" before
> | writing the word "text2"). How can I accomplish
> this? I can't find any
> | function in the documentation to remove
> characters from a file...
> |
> | Thanks
> |
> | Giacomo
> |