[R] How to pass different arguments to a function within lapply()?

[Richard Ma]

Hi David,

Thank you very much. Problem solved.

sapply() and lapply() are so powerful that even I have read their documents
several times, still lots of tricky stuff to learn and try.

Thank you again!
Richard


David Winsemius wrote:
> 
> 
>  > sapply(c("hsp", "dal"), function(x) locpoly(x=ts, y=rst[[x]],  
> bandwidth=bw[[x]], gridsize=gs) )
>    hsp         dal
> x Numeric,350 Numeric,350
> y Numeric,350 Numeric,350
> 
> 
> -- 
> David.
>>
>> In above example, I can apply the "locpoly()" to each column of  
>> “rst”. But
>> if I want to apply this function to all columns of "rst", I guess I  
>> should
>> use lapply() function.
>>
>> However, the "bandwidth", one of the locpoly()'s arguments should be
>> different due to different columns of "rst". It means that when R  
>> apply
>> locpoly() to first column "hsp", the "bandwidth" should be set as
>> correspondent bandwidth.
>>
>> My problem is, how to pass the "bandwidth" argument to "locpoly"  
>> within
>> lapply() in terms of different column names?
>>
>> My example just tedious if the "rst" has lots of columns. So I  
>> wonder if
>> there exist more convenient way to get this job done.
>>
>> Thank you.
>>
>> -----
>> Richard Ma
>> PhD student, Ecology & Remote Sensing
>> Climate Change Cluster, Department of Environment Science
>> University of Technology, Sydney
>> --
>> View this message in context:
>> http://r.789695.n4.nabble.com/How-to-pass-different-arguments-to-a-function-within-lapply-tp3728858p3728858.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
>> ______________________________________________
>> R-help at 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.
> 
> David Winsemius, MD
> West Hartford, CT
> 
> ______________________________________________
> R-help at 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.
> 


-----
Richard Ma
PhD student, Ecology & Remote Sensing
Climate Change Cluster, Department of Environment Science
University of Technology, Sydney
--
View this message in context: http://r.789695.n4.nabble.com/How-to-pass-different-arguments-to-a-function-within-lapply-tp3728858p3729070.html
Sent from the R help mailing list archive at Nabble.com.