[R] Simple Question

[David Winsemius]

On Sep 27, 2012, at 11:13 PM, Bhupendrasinh Thakre wrote:

> 
> Hi Everyone,
> 
> I am trying a very simple task to append the Timestamp with a variable name so something like 
> a_2012_09_27_00_12_30 <- rnorm(1,2,1).

If you want to assign a value to a character-name you need to use ... `assign`. You cannot just stick a numeric value which is what you get with sys.Time() on the LHS of a "<-" and expect R to intuit what you intend.

?assign
assign( "a_2012_09_27_00_12_30" ,  rnorm(1,2,1) )
assign( as.character(unclass(Sys.time())) ,  rnorm(1,2,1) )

(I would have thought you wanted to format that sys.Time result:)

> format(Sys.time(), "%Y_%m_%d_%H_%M_%S")
[1] "2012_09_27_23_32_40"

>  assign(format(Sys.time(), "%Y_%m_%d_%H_%M_%S"),  rnorm(1,2,1) )
> grep("^2012", ls(), value=TRUE)
[1] "2012_09_27_23_33_45"


> 
> Tried some commands but it doesn't work out well. Hope someone has some answer on it.
> 
> Session Info 
> 
> R version 2.15.1 (2012-06-22)
> Platform: i386-apple-darwin9.8.0/i386 (32-bit)
> 
> locale:
> [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
> 
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base     
> 
> other attached packages:
> [1] chron_2.3-42    twitteR_0.99.19 rjson_0.2.9     RCurl_1.91-1    bitops_1.0-4.1  tm_0.5-7.1      RMySQL_0.9-3    DBI_0.2-5      
> 
> loaded via a namespace (and not attached):
> [1] slam_0.1-24  tools_2.15.1
> 
> Statement I tried :
> 
> b <- unclass(Sys.time())
> b = 1348812597
> c_b <- rnorm(1,2,1)
> 
> Works perfect but doesn't show me c_1348812597.
> 
> Best Regards,
> 
> 
> Bhupendrasinh Thakre
> 	[[alternative HTML version deleted]]

BT; Please learn to post in plain text. It's really very simple with gmail.

-- 

David Winsemius, MD
Alameda, CA, USA