Hello, Stefano,
maybe the following example contains what you want to achieve:
Station1 <- data.frame(sensor = c("thermometer", "raingauge",
"snowgauge", "anemometer"),
code = c(2583, 1478, 3178, NA))
Station2 <- data.frame(sensor = c("thermometer", "raingauge",
"snowgauge", "anemometer"),
code = c(2584, 1479, 3179, 4453))
Station3 <- data.frame(sensor = c("thermometer", "raingauge",
"snowgauge", "anemometer"),
code = c(2584, 1479, 3179, 4453))
Station4 <- data.frame(sensor = rev(c("thermometer", "raingauge",
"snowgauge", "anemometer")),
code = c(2584, 1479, 3179, 4453))
Station5 <- data.frame(sensor = c("raingauge", "snowgauge",
"thermometer", "anemometer"),
code = c(2584, 1479, 3179, 4453))
Total <- list("Station1"=Station1, "Station2"=Station2,
Station3 = Station3, Station4 = Station4,
Station5 = Station5)
select.stat <- paste0("Station", c(1, 4, 5))
select.sens <- "thermometer"
sapply(Total[select.stat], function(x, sens)
x$code[x$sensor == sens], sens = select.sens)
Hth -- Gerrit
---------------------------------------------------------------------
Dr. Gerrit Eichner Mathematical Institute, Room 212
gerrit.eich...@math.uni-giessen.de Justus-Liebig-University Giessen
Tel: +49-(0)641-99-32104 Arndtstr. 2, 35392 Giessen, Germany
http://www.uni-giessen.de/eichner
---------------------------------------------------------------------
Am 15.12.2022 um 14:52 schrieb Stefano Sofia:
Dear R-list users,
I have a list of n data frames built as follows:
Station1 <- data.frame(sensor = c("thermometer", "raingauge", "snowgauge",
"anemometer"), code = c(2583, 1478, 3178, NA))
Station2 <- data.frame(sensor = c("thermometer", "raingauge", "snowgauge",
"anemometer"), code = c(2584, 1479, 3179, 4453))
....
Total <- list("Station1"=Station1, "Station2"=Station2, ...)
I would need to have a vector with the sensor codes of the thermometers of some
stations, let's say of Station1, Station2 and Station5 (i.e. c(2583, 2584,
2587)).
I tried with lapply, but I have not been able to get what I need.
Could you please help me?
Thank you
Stefano
(oo)
--oOO--( )--OOo--------------------------------------
Stefano Sofia PhD
Civil Protection - Marche Region - Italy
Meteo Section
Snow Section
Via del Colle Ameno 5
60126 Torrette di Ancona, Ancona (AN)
Uff: +39 071 806 7743
E-mail: stefano.so...@regione.marche.it
---Oo---------oO----------------------------------------
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