[R] Printout and saved results

[Steven Yen]

I just like the subroutine to spit out results (Mean, Std.dev, etc.) and 
also be able to access the results for further processing, i.e.,

v$Mean

v$Std.dev

On 3/26/2024 11:24 AM, Richard O'Keefe wrote:
> Not clear what you mean by "saved".
> If you call a function and the result is printed, the result is
> remembered for a wee while in
> the variable .Last.value, so you can do
>> function.with.interesting.result(.......)
>> retained.interesting.result <- .Last.value
> or even
>> .Last.value -> retained.interesting.result
> If you know before you start writing the expression that you want to
> save the value,
> you can wrap the assignment in parentheses, making it an expression:
>
>> (retained.interesting.result <- function.with.interesting.result(......))
>
> On Tue, 26 Mar 2024 at 15:03, Steven Yen <styen using ntu.edu.tw> wrote:
>> How can I have both printout and saved results at the same time.
>>
>> The subroutine first return "out" and the printout gets printed, but not
>> saved.
>>
>> I then run the "invisible" line. Results got saved and accessible but no
>> printout.
>>
>> How can I have both printout and also have the results saved? Thank you!
>>
>>   > dstat4 <- function(data,digits=3){
>> +   Mean    <- apply(data,2,mean,na.rm=TRUE)
>> +   Std.dev <- apply(data,2,sd,  na.rm=TRUE)
>> +   Min <- apply(data,2,min,na.rm=TRUE)
>> +   Max <- apply(data,2,max,na.rm=TRUE)
>> +   Obs <- dim(data)[1]
>> +   out <-round(cbind(Mean,Std.dev,Min,Max,Obs),digits)
>> +   out
>> + # invisible(list(Mean=Mean,Std.dev=Std.dev,Min=Min,Max=Max))
>> + }
>>   > x1<-rnorm(n=5,mean=5, sd=1)
>>   > x2<-rnorm(n=5,mean=10,sd=2)
>>   > w<-rnorm(n=5,mean=2,sd=0.3)
>>   > mydata<-data.frame(cbind(x1,x2))
>>   > v<-dstat4(mydata); v
>>        Mean Std.dev   Min    Max Obs
>> x1  5.000   0.922 3.900  6.282   5
>> x2 10.769   1.713 9.209 13.346   5
>>   > v$Mean
>> Error in v$Mean : $ operator is invalid for atomic vectors
>>   > dstat4 <- function(data,digits=3){
>> +   Mean    <- apply(data,2,mean,na.rm=TRUE)
>> +   Std.dev <- apply(data,2,sd,  na.rm=TRUE)
>> +   Min <- apply(data,2,min,na.rm=TRUE)
>> +   Max <- apply(data,2,max,na.rm=TRUE)
>> +   Obs <- dim(data)[1]
>> +   out <-round(cbind(Mean,Std.dev,Min,Max,Obs),digits)
>> + # out
>> +   invisible(list(Mean=Mean,Std.dev=Std.dev,Min=Min,Max=Max))
>> + }
>>
>>   > v<-dstat4(mydata)
>>   > v$Mean
>>         x1       x2
>> 4.233051 9.564454
>>
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