[R] [External] Get a result but an error message as well ?

[Rui Barradas]

Hello,

Inline.

Às 21:38 de 19/05/20, varin sacha via R-help escreveu:
> 
> Hi Richard,
> 
> Thanks for your response.
> However, how can I correct my R code knowing that I want, as a result, only one value : the mean of the 500 MSE_OLS values ?

Just don't transpose the output of replicate?

Hope this helps,

Rui Barradas
> 
> 
> 
> 
> 
> 
> 
> Le mardi 19 mai 2020 à 21:59:07 UTC+2, Richard M. Heiberger <rmh using temple.edu> a écrit :
> 
> 
> 
> 
> 
>> dim(my.data)
> [1]   1 500
> 
> you have a matrix with a single row and 500 columns.
> you gave a name to only the first column.
> 
> Look at the result of replicate().  it is a vector.  You transposed it into a one-row matrix.
> 
>>   tmp <- replicate( 500, my.experiment() )
>> dim(tmp)
> NULL
>> length(tmp)
> [1] 500
>> dim(t(tmp))
> [1]   1 500
> 
> 
> On Tue, May 19, 2020 at 3:51 PM varin sacha via R-help <r-help using r-project.org> wrote:
>> Dear R-experts,
>>
>> Here is my R code, I get a result but I also get an error message so I doubt I can trust the result I get.
>> What is going wrong ? Many thanks.
>>
>> ########################################
>> a<-c(2,4,3,4,6,5,3,1,2,3,4,3,4,5,65)
>> b<-c(23,45,32,12,23,43,56,44,33,11,12,54,23,34,54)
>> d<-c(9,4,5,3,2,1,3,4,5,6,4,9,10,11,18)
>>
>> my.experiment <- function( ) {
>>
>> OLS <- lm( a ~ b+d )
>> MSE_OLS<-mean(OLS$residuals^2)
>> return( c(MSE_OLS) )
>> }
>>
>> my.data = t(replicate( 500, my.experiment() ))
>> colnames(my.data) <- c("MSE_OLS")
>> mean(my.data)
>> ########################################
>>   
>>
>> ______________________________________________
>> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> 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.
>>
> 
> ______________________________________________
> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.
>