tdfapply: Apply a Function of a value vector in a data frame

In ecor/ncdf4df: ncdf4df

Description

Apply a function to each value of the value field of the data frame conserving the other fields of the data frame using tapply

Usage

tdfapply(data, TimeField = "Time", ValueField = "value",
  add_fields = c("month", "year", "season"), FactorFields = c("Station",
  "month", "variable"), FUN = sum, return.data.frame = TRUE, ...)

Arguments

data	data frame
TimeField	character string containg time field of data
ValueField	character string containg time field of data
add_fields	character string. Default is c("month","year","season")
FactorFields	character string indicating the name of data frema fiels using as factors
FUN	atomic function
return.data.frame	logical vaue. If it is TRUE the value is melted into a data rame. Default is TRUE
...	further arguments for tapply

See Also

tapply,melt,show.year.month.season

Examples

library(ncdf4df)
## ncname <- "/Users/ecor/Dropbox/iasma/RMAWGENdev/ncdf4df/inst/trentino/data/trentino_hourlyweatherdata.nc"
ncname <- system.file("trentino/data/trentino_hourlyweatherdata.nc",package="ncdf4df")
nc <- nc_open(ncname)
meteoPrec <- ncvar_get_df_values(nc=nc,x="Prec",verbose=TRUE)
meteoPrec2 <- ncvar_get_df_values(nc=nc,x="Prec",verbose=TRUE,show_year=TRUE,show_month=TRUE)
nc_close(nc)

MonthlyPrec <- tdfapply(data=meteoPrec,FactorFields=c("Station","month","year"),FUN=sum,na.rm=TRUE)

str(MonthlyPrec)

ecor/ncdf4df documentation built on May 15, 2019, 10:06 p.m.