R/pvap.r

In alfcrisci/rBiometeo: Biometeorological Functions in R

#' pvap
#'
#' Vapour pressure estimate from relative humidity.
#'
#' @param t numeric Air temperature in degC.
#' @param rh numeric Relative humidity in percentage.
#' @return vapour pressure in hPa.
#'
#'
#' @author Istituto per la Bioeconomia CNR Firenze Italy  Alfonso Crisci \email{alfonso.crisci@@ibe.cnr.it}
#' @keywords  vapour pressure 
#' 
#' @export
#'
#'
#'
#'

pvap=function(t,rh) {
                         ct$assign("t", as.array(t))
                         ct$assign("rh", as.array(rh))
                         ct$eval("var res=[]; for(var i=0, len=t.length; i < len; i++){ res[i]=pvap(t[i],rh[i])};")
                         res=ct$get("res")
                         return(ifelse(res==9999,NA,res))
}