Dear R list users,
I have three lists of data frames, respectively temp_list, wind_list and
snow_list.
The elements of these three lists are
temp_list$station1, temp_list$station2 and temp_list$station3 with columns date
and temp;
wind_list$station1, wind_list$station2 and wind_list$station3 with columns
date, wind_vel and wind_dir;
snow_list$station1, snow_list$station2 and snow_list$station3 with columns date
and hs
where date has been transformed to character.
I need to merge temp_list$station1, wind_list$station1 and snow_list$station1,
and same thing for station2 and station3.
If I create a list
list_all <- list(temp_list$station1, wind_list$station1, snow_list$station1)
then
Reduce(function(x, y) merge(x, y, by=c("date"), all=TRUE), list_all)
will do it. But then I have to create the other two lists and apply again
Reduce.
I would like to create a list of list and using lapply twice in order to get
this process completely automatic.
I tried
list_all <- list(temp_list, wind_list, snow_list)
names(list_all) <- c("temp", "wind", "snow")
lapply(names(list_all), function(val){list_all$val, lapply(c("station1",
"station2", "station3"), function(val){Reduce(function(x, y) merge(x$val,
y$val, by=c("date"), all=TRUE), list_all)}), list_all})
but it gives me a syntax error and I am struggling to make it work.
Could someboby help me to create the correct loop?
Thank you for your help
Stefano
________________________________
AVVISO IMPORTANTE: Questo messaggio di posta elettronica può contenere
informazioni confidenziali, pertanto è destinato solo a persone autorizzate
alla ricezione. I messaggi di posta elettronica per i client di Regione Marche
possono contenere informazioni confidenziali e con privilegi legali. Se non si
è il destinatario specificato, non leggere, copiare, inoltrare o archiviare
questo messaggio. Se si è ricevuto questo messaggio per errore, inoltrarlo al
mittente ed eliminarlo completamente dal sistema del proprio computer. Ai sensi
dell’art. 6 della DGR n. 1394/2008 si segnala che, in caso di necessità ed
urgenza, la risposta al presente messaggio di posta elettronica può essere
visionata da persone estranee al destinatario.
IMPORTANT NOTICE: This e-mail message is intended to be received only by
persons entitled to receive the confidential information it may contain. E-mail
messages to clients of Regione Marche may contain information that is
confidential and legally privileged. Please do not read, copy, forward, or
store this message unless you are an intended recipient of it. If you have
received this message in error, please forward it to the sender and delete it
completely from your computer system.
[[alternative HTML version deleted]]
______________________________________________
R-help@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.
