R help - Aug 2013 - storing multidimensional arrays - save and load -

I am have a procedure which generates multidimensional arrays.

To compute them is expensive so I want to store them in order to be
able to analyse them later.

I am using at the moment

problem is that the array is always assigned to a variable ma (the
computation is in a loop).
Than I generate a file name and store it (i.e)
save(ma, file="ma1.txt")
save(ma, file="ma2.txt")
...


problem starts when I want to load it
load("ma1.RData") # loads in ma
load("ma2.RData") # overrides ma

How can i prevent this behaviour. Is there a better way to store
multidimensional arrays?

regards


-- 
Witold Eryk Wolski

You can use saveRDS() and readRDS() instead of save/load. Unlike load
readRDS just returns the value, allowing you to assign it to whatever name
you want.

Best,
Ista


On Wed, Aug 14, 2013 at 5:52 AM, Witold E Wolski <wewolski@gmail.com>
wrote:
> I am have a procedure which generates multidimensional arrays.
>
> To compute them is expensive so I want to store them in order to be
> able to analyse them later.
>
> I am using at the moment
>
> problem is that the array is always assigned to a variable ma (the
> computation is in a loop).
> Than I generate a file name and store it (i.e)
> save(ma, file="ma1.txt")
> save(ma, file="ma2.txt")
> ...
>
>
> problem starts when I want to load it
> load("ma1.RData") # loads in ma
> load("ma2.RData") # overrides ma
>
> How can i prevent this behaviour. Is there a better way to store
> multidimensional arrays?
>
> regards
>
>
> --
> Witold Eryk Wolski
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
	[[alternative HTML version deleted]]

Dear Witold E Wolski,

Re:
> I am have a procedure which generates multidimensional arrays.
> 
> To compute them is expensive so I want to store them in order to be
> able to analyse them later.
> 
> I am using at the moment
> 
> problem is that the array is always assigned to a variable ma (the
> computation is in a loop).
> Than I generate a file name and store it (i.e)
> save(ma, file="ma1.txt")
> save(ma, file="ma2.txt")
> ...
> 
> 
> problem starts when I want to load it
> load("ma1.RData") # loads in ma
> load("ma2.RData") # overrides ma
> 
> How can i prevent this behaviour. Is there a better way to store
> multidimensional arrays?
> 
> regards
> 
> 
> -- 
> Witold Eryk Wolski



It would be no problem if you processed one such array at a time, so

 1  load("ma1.RData") # loads in ma
 2  process array ma and save/print output
 3  load("ma2.RData") # overrides ma
 4  process array ma (now the new one) and save etc.
...

This can be automated by reading the directory contents and make a list of
"ma-files", to be processed in a loop.
(I can provide an example if you like).

Hope this helps,

Best wishes,



Dr. Franklin Bretschneider
Dept of Biology
Utrecht Unversity
Padualaan 8
3584 CH  Utrecht
The Netherlands
f.bretschneider@uu.nl



	[[alternative HTML version deleted]]