[R] how to get R interpreter to remember constant values without using any memory location
macq at llnl.gov
Thu Aug 13 21:17:20 CEST 2009
Like Ben, I wonder what the reason for doing this is.
First of all, the amount of memory indicated by your example is so
small I can't imagine it would make any difference. If you have such
a large number of values that the amount of memory is significant --
and store them somewhere that isn't in memory (such as physical disk
memory), then reading them into memory when you need to use them
might affect performance a lot.
Environment variables use memory also -- it's just someone else's
memory (the OS instead of R).
At 4:05 PM +0200 8/13/09, <mauede at alice.it> wrote:
>Maybe I expect too much from a non compiled language.
>Anyway, I wonder whether it is possible in R to set constant values
>without using any memory location that would take useless space
>bacause such values are not going to be changed along the program.
>It's just a way to assign a mnemnic name tos some constant values.
>For instance, I would like R interpreter to replace all occurrences
>of mnemonic "Monday" with the number 1, "Tuesday" with the number
>2, "Wednesday with the number 3, and so on ... without having to
>assign such values to memory locations.
>Maybe environment variables are the way to go ?
>Thank you in advance for your advice,
>tutti i telefonini TIM!
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