R/mk_nudging_params.R
In mccreigh/rwrfhydro: R tools for the WRF Hydro Model
Defines functions
MkNudgingParams
Documented in
MkNudgingParams
##' Create a parameter file for nudging.
##'
##' @param gageId Character vector of gage identifiers also used in the timeslice files.
##' @param R Numeric vector same length as gageId which describes the radius of influence at each gage.
##' @param G Numeric vector same length as gageId which describes the nudging amplitude at each gage.
##' @param tau Numeric vector same length as gageId which describes the size of the temporal half-window in minutes.
##' @param qThresh Numeric [length(gageId), 12, nThresh] threshhold of flow for acf selection.
##' @param expCoeff Numeric [length(gageId), 12, nThresh+1] actually the denominator in exp(-y/b).
##' @param outFile Character path/file to the desired output file
##' @param overwrite Logical, overwrite outFile if it already exists?
##' @param rmBlankGages Take out gages where the name is blank?
##' @examples
##' \dontrun{
##' ## Once and future CONUS example snippett
##' gageParams <- read.csv('~/ncar/WRF_Hydro/DOMAIN_library/CONUS/nhdRtIntersect.csv',
##' colClasses = 'character' )
##'
##' ## Boulder creek domain PMO example
##' gageParams <- data.frame( gageId = paste0('g',formatC(1:403,width=3,flag='0')), stringsAsFactors=FALSE)
##' gageParams$R=0
##' gageParams$G=1
##' gageParams$tau=20
##' MkNudgingParams(gageId=gageParams$gageId, R=gageParams$R,
##' G=gageParams$G, tau=gageParams$tau,
##' outFile='~/WRF_Hydro/Col_Bldr_Creek/PMO/nudgingParams.PMOallGages.nc',
##' overwrite=TRUE)
##' # FRNG example
##' ## The existing params file
##' if(FALSE) {
##' devtools::load_all()
##' ## existing parameter file to change/extend
##' paramPath <- '~/WRF_Hydro/FRNG_NHD/RUN/prstTestFeb2016/DOMAIN/'
##' frnParams <- paste0(paramPath,'nudgingParams.rwValid5.nc')
##' gageParamId <- ncdump(frnParams,'stationId',q=TRUE)
##' gageParamR <- ncdump(frnParams,'R',q=TRUE)
##' gageParamG <- ncdump(frnParams,'G',q=TRUE)
##' gageParamTau <- ncdump(frnParams,'tau',q=TRUE)
##' nGages=length(gageParamId)
##'
##' ## the existing parameter file had blanks, remove them.
##' options(warn=1)
##' MkNudgingParams(gageId=gageParamId, R=gageParamR,
##' G=gageParamG, tau=gageParamTau,
##' outFile=paste0(paramPath,'nudgingParams.rwValid5.rmBlanks.nc'),
##' overwrite=TRUE, rmBlankGages=TRUE)
##'
##'
##' ## Uniform tiny coefficient, simulate not having these parameters.
##' nGages <- length(gageParamId)
##' gageParamQThresh1 <- array(rep(c(1000000),each=nGages*12),dim=c(nGages,12,1))
##' gageExpCoeff1 <- array(rep(c(1e-38),each=nGages*12),dim=c(nGages,12,2))
##' print(
##' MkNudgingParams(gageId=gageParamId, R=gageParamR,
##' G=gageParamG, tau=gageParamTau,
##' qThresh=gageParamQThresh1,
##' expCoeff=gageExpCoeff1,
##' outFile=paste0(paramPath,'nudgingParams.rwValid5.rmBlanksPrstTinyExp.nc'),
##' overwrite=TRUE, rmBlankGages=TRUE)
##' )
##'
##' ## In this example the exponent only depends on threshold, not location nor month.
##' ## The first threshold is negative, so only coefficients for the second threshold index should be
##' ## applied and in this case will be tiny, so again have no effect.
##' nGages <- length(whGages <- which(trimws(gageParamId) != '' ))
##' #nGages <- length(gageParamId)
##' gageParamQThresh1 <- array(c(-100),dim=c(nGages,12,1))
##' ## *** THIS IS THE CORRECT WAY OF FILLING THE ARRAY : KISS ***
##' gageExpCoeff1 <- array(c(1e-38,120),dim=c(nGages,12,2))
##' print(
##' MkNudgingParams(gageId=gageParamId[whGages], R=gageParamR[whGages],
##' G=gageParamG[whGages], tau=gageParamTau[whGages],
##' qThresh=gageParamQThresh1,
##' expCoeff=gageExpCoeff1,
##' outFile=paste0(paramPath,'nudgingParams.rwValid5.rmBlanksPrst1ThreshMed.nc'),
##' overwrite=TRUE, rmBlankGages=TRUE)
##' )
##' ## CONUS
##' ## In this example the exponent only depends on threshold, not location nor month.
##' ## The first threshold is negative, so only coefficients for the second threshold index should be
##' ## applied and in this case will be tiny, so again have no effect.
##' paramPath <- '~/WRF_Hydro/TESTING/TEST_FILES/CONUS/2015-12-04_20:08:06.b8e1e01c4cc2/STD/NUDGING/'
##' frnParams <- paste0(paramPath,'nudgingParams.nc')
##' gageParamId <- ncdump(frnParams,'stationId',q=TRUE)
##' gageParamR <- ncdump(frnParams,'R',q=TRUE)
##' gageParamG <- ncdump(frnParams,'G',q=TRUE)
##' gageParamTau <- ncdump(frnParams,'tau',q=TRUE)
##' nGages=length(gageParamId)
##'
##' rmGages <- c(" 05059500", " 05054000", " 05082500", " 10108400",
##' " 09183600", " 08387550", " 08158930", " 06470500",
##' " 06768000", " 05427943", " 05551675", " 03298135",
##' " 03352953", " 07083200", " 07358284", " 02458450",
##' " 02310678", " 02302010", " 02237700", " 02299472",
##' " 0212467595", " 0214676115", " 02011460", " 01446776",
##' " 12306500", " 11119750", " 10257549", " 11122010",
##' " 11276600", formatC('', width=15) )
##'
##' nGages <- length(whGages <- which(!(gageParamId %in% rmGages)))
##' #nGages <- length(gageParamId)
##' gageParamQThresh1 <- array(c(-100),dim=c(nGages,12,1))
##'
##' ## *** THIS IS THE CORRECT WAY OF FILLING THE ARRAY : KISS ***
##' gageExpCoeff1 <- array(c(1e-38,120),dim=c(nGages,12,2))
##' print(
##' MkNudgingParams(gageId=gageParamId[whGages], R=gageParamR[whGages],
##' G=gageParamG[whGages], tau=gageParamTau[whGages],
##' qThresh=gageParamQThresh1,
##' expCoeff=gageExpCoeff1,
##' outFile=paste0(paramPath,'nudgingParams.conusPstActive.nc'),
##' overwrite=TRUE, rmBlankGages=TRUE)
##' )
##'
##'
##' #array(rep(c(.5,.8),each=4*12),dim=c(4,12,2))
##' }
##'
##' ## the existing parameter file had blanks, remove them.
##' options(warn=1)
##' MkNudgingParams(gageId=gageParamId, R=gageParamR,
##' G=gageParamG, tau=gageParamTau,
##' outFile=paste0(paramPath,'nudgingParams.rwValid5.rmBlanks.nc'),
##' overwrite=TRUE, rmBlankGages=TRUE)
##'
##'
##' ## In this example the exponent only depends on threshold, not location nor month.
##' gageParamqThresh1 = array(rep(c(.5,.8),each=4*12),dim=c(4,12,2))
##'
##' MkNudgingParams(gageId=gageParams$gageId, R=gageParams$R,
##' G=gageParams$G, tau=gageParams$tau,
##' outFile=paste0(paramPath,'nudgingParams.rwValid5.persistence.nc'),
##' overwrite=TRUE, rmBlankGages=TRUE)
##' } #dontrun
##' @keywords manip IO
##' @concept dataMgmt nudging
##' @family nudging
##' @export
MkNudgingParams <- function(gageId, R, G, tau,
qThresh=NULL,
expCoeff=NULL,
outFile, overwrite=FALSE,
rmBlankGages=TRUE) {
if(file.exists(outFile) & !overwrite) {
warning(paste0('File ',outFile,' exists and overwrite=FALSE, returning.'))
return('')
}
# A constructor, sorta. easy way to check the inputs.
gageId <- formatC(gageId, width=15)
gageParams <- data.frame(gageId=gageId, R=R, G=G, tau=tau, stringsAsFactors = FALSE)
whBlank <- which(trimws(gageParams$gageId)=='')
if(length(whBlank)) {
warning("Blanks found in the input gage list")
if(rmBlankGages) {
warning('Removing blank gages from entries of all variables')
gageParams <- gageParams[-whBlank,]
if(!is.null(qThresh) | !is.null(expCoeff)) {
qThresh <- qThresh[-whBlank, , , drop=FALSE]
expCoeff <- expCoeff[-whBlank, , , drop=FALSE]
}
}
}
## need to set the missing value used by ncdf4? i think it's NA by default
dimensionList <-
list( # n.b. the dimension order: z,y,x,t
stationIdInd=list(name='stationIdInd',
units='',
values=1:nrow(gageParams),
unlimited=TRUE,
create_dimvar=FALSE),
stationIdStrLen=list(name='stationIdStrLen',
units='',
values=1:15,
unlimited=FALSE,
create_dimvar=FALSE)
)
if(!is.null(qThresh) | !is.null(expCoeff)) {
if(is.null(qThresh) | is.null(expCoeff)) {
warning("Both thresh and expCoeff must be defined if one of them is. Returning")
return(NULL)
}
if(!all((dim(qThresh)+c(0,0,1)) == dim(expCoeff) )) {
warning("Variables qThresh and expCoeff must have the same dimensions. Returning")
return(NULL)
}
if(dim(expCoeff)[1] != nrow(gageParams)) {
warning("First dimension of expCoeff & qThresh must equal length of gageId")
if(length(whBlank) & rmBlankGages) {
warning(paste0('Removing blank gages may have resulted in dimension ',
'problems with qThresh and expCoeff.'))
return(NULL)
}
}
if(dim(expCoeff)[2] != 12){
warning("Second dimension of expCoeff & qThresh must be of length 12 (months).")
return(NULL)
}
dimensionList[[3]] <- list(name='monthInd',
units='month',
values=1:12,
unlimited=FALSE,
create_dimvar=FALSE)
dimensionList[[4]] <- list(name='threshInd',
units='m^3/s',
values=1:(dim(qThresh)[3]),
unlimited=FALSE,
create_dimvar=FALSE)
dimensionList[[5]] <- list(name='threshCatInd',
units='m^3/s',
values=1:(dim(expCoeff)[3]),
unlimited=FALSE,
create_dimvar=FALSE)
names(dimensionList)[c(3,4,5)] <- c('monthInd','threshInd','threshCatInd')
}
varList = list()
varList[[1]] <-
list( name='stationId',
longname='USGS station identifer',
units='-',
precision = 'char',
#missing = ,
dimensionList=dimensionList[c('stationIdStrLen','stationIdInd')],
data = gageParams$gageId )
varList[[2]] <-
list( name='R',
longname='Radius of influence in meters',
units='meters',
precision = 'float',
#missing = ,
dimensionList=dimensionList[c('stationIdInd')],
data = gageParams$R )
varList[[3]] <-
list( name='G',
longname='Amplitude of nudging',
units='-',
precision = 'float',
#missing = ,
dimensionList=dimensionList[c('stationIdInd')],
data = gageParams$G )
varList[[4]] <-
list( name='tau',
longname='Time tapering parameter half window size in minutes',
units='minutes',
precision = 'float',
#missing = ,
dimensionList=dimensionList[c('stationIdInd')],
data = gageParams$tau )
if(!is.null(qThresh) | !is.null(expCoeff)) {
varList[[5]] <-
list( name='qThresh',
longname='Discharge threshold category',
units='m^3/s',
precision = 'float',
##missing = ,
dimensionList=dimensionList[c('threshInd','monthInd','stationIdInd')],
#dimensionList=dimensionList[c('stationIdInd','monthInd','threshInd')],
data = qThresh )
varList[[6]] <-
list( name='expCoeff',
longname='Coefficient b in denominator e^(-dt/b)',
units='minutes',
precision = 'float',
##missing = ,
dimensionList=dimensionList[c('threshCatInd','monthInd','stationIdInd')],
#dimensionList=dimensionList[c('stationIdInd','monthInd','threshCatInd')],
data = expCoeff )
}
MkNcdf(varList, filename=outFile, overwrite=overwrite)
ncdump(outFile)
invisible(outFile)
}
mccreigh/rwrfhydro documentation built on Feb. 28, 2021, 1:53 p.m.
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Defines functions MkNudgingParams
Documented in MkNudgingParams
##' Create a parameter file for nudging.
##'
##' @param gageId Character vector of gage identifiers also used in the timeslice files.
##' @param R Numeric vector same length as gageId which describes the radius of influence at each gage.
##' @param G Numeric vector same length as gageId which describes the nudging amplitude at each gage.
##' @param tau Numeric vector same length as gageId which describes the size of the temporal half-window in minutes.
##' @param qThresh Numeric [length(gageId), 12, nThresh] threshhold of flow for acf selection.
##' @param expCoeff Numeric [length(gageId), 12, nThresh+1] actually the denominator in exp(-y/b).
##' @param outFile Character path/file to the desired output file
##' @param overwrite Logical, overwrite outFile if it already exists?
##' @param rmBlankGages Take out gages where the name is blank?
##' @examples
##' \dontrun{
##' ## Once and future CONUS example snippett
##' gageParams <- read.csv('~/ncar/WRF_Hydro/DOMAIN_library/CONUS/nhdRtIntersect.csv',
##' colClasses = 'character' )
##'
##' ## Boulder creek domain PMO example
##' gageParams <- data.frame( gageId = paste0('g',formatC(1:403,width=3,flag='0')), stringsAsFactors=FALSE)
##' gageParams$R=0
##' gageParams$G=1
##' gageParams$tau=20
##' MkNudgingParams(gageId=gageParams$gageId, R=gageParams$R,
##' G=gageParams$G, tau=gageParams$tau,
##' outFile='~/WRF_Hydro/Col_Bldr_Creek/PMO/nudgingParams.PMOallGages.nc',
##' overwrite=TRUE)
##' # FRNG example
##' ## The existing params file
##' if(FALSE) {
##' devtools::load_all()
##' ## existing parameter file to change/extend
##' paramPath <- '~/WRF_Hydro/FRNG_NHD/RUN/prstTestFeb2016/DOMAIN/'
##' frnParams <- paste0(paramPath,'nudgingParams.rwValid5.nc')
##' gageParamId <- ncdump(frnParams,'stationId',q=TRUE)
##' gageParamR <- ncdump(frnParams,'R',q=TRUE)
##' gageParamG <- ncdump(frnParams,'G',q=TRUE)
##' gageParamTau <- ncdump(frnParams,'tau',q=TRUE)
##' nGages=length(gageParamId)
##'
##' ## the existing parameter file had blanks, remove them.
##' options(warn=1)
##' MkNudgingParams(gageId=gageParamId, R=gageParamR,
##' G=gageParamG, tau=gageParamTau,
##' outFile=paste0(paramPath,'nudgingParams.rwValid5.rmBlanks.nc'),
##' overwrite=TRUE, rmBlankGages=TRUE)
##'
##'
##' ## Uniform tiny coefficient, simulate not having these parameters.
##' nGages <- length(gageParamId)
##' gageParamQThresh1 <- array(rep(c(1000000),each=nGages*12),dim=c(nGages,12,1))
##' gageExpCoeff1 <- array(rep(c(1e-38),each=nGages*12),dim=c(nGages,12,2))
##' print(
##' MkNudgingParams(gageId=gageParamId, R=gageParamR,
##' G=gageParamG, tau=gageParamTau,
##' qThresh=gageParamQThresh1,
##' expCoeff=gageExpCoeff1,
##' outFile=paste0(paramPath,'nudgingParams.rwValid5.rmBlanksPrstTinyExp.nc'),
##' overwrite=TRUE, rmBlankGages=TRUE)
##' )
##'
##' ## In this example the exponent only depends on threshold, not location nor month.
##' ## The first threshold is negative, so only coefficients for the second threshold index should be
##' ## applied and in this case will be tiny, so again have no effect.
##' nGages <- length(whGages <- which(trimws(gageParamId) != '' ))
##' #nGages <- length(gageParamId)
##' gageParamQThresh1 <- array(c(-100),dim=c(nGages,12,1))
##' ## *** THIS IS THE CORRECT WAY OF FILLING THE ARRAY : KISS ***
##' gageExpCoeff1 <- array(c(1e-38,120),dim=c(nGages,12,2))
##' print(
##' MkNudgingParams(gageId=gageParamId[whGages], R=gageParamR[whGages],
##' G=gageParamG[whGages], tau=gageParamTau[whGages],
##' qThresh=gageParamQThresh1,
##' expCoeff=gageExpCoeff1,
##' outFile=paste0(paramPath,'nudgingParams.rwValid5.rmBlanksPrst1ThreshMed.nc'),
##' overwrite=TRUE, rmBlankGages=TRUE)
##' )
##' ## CONUS
##' ## In this example the exponent only depends on threshold, not location nor month.
##' ## The first threshold is negative, so only coefficients for the second threshold index should be
##' ## applied and in this case will be tiny, so again have no effect.
##' paramPath <- '~/WRF_Hydro/TESTING/TEST_FILES/CONUS/2015-12-04_20:08:06.b8e1e01c4cc2/STD/NUDGING/'
##' frnParams <- paste0(paramPath,'nudgingParams.nc')
##' gageParamId <- ncdump(frnParams,'stationId',q=TRUE)
##' gageParamR <- ncdump(frnParams,'R',q=TRUE)
##' gageParamG <- ncdump(frnParams,'G',q=TRUE)
##' gageParamTau <- ncdump(frnParams,'tau',q=TRUE)
##' nGages=length(gageParamId)
##'
##' rmGages <- c(" 05059500", " 05054000", " 05082500", " 10108400",
##' " 09183600", " 08387550", " 08158930", " 06470500",
##' " 06768000", " 05427943", " 05551675", " 03298135",
##' " 03352953", " 07083200", " 07358284", " 02458450",
##' " 02310678", " 02302010", " 02237700", " 02299472",
##' " 0212467595", " 0214676115", " 02011460", " 01446776",
##' " 12306500", " 11119750", " 10257549", " 11122010",
##' " 11276600", formatC('', width=15) )
##'
##' nGages <- length(whGages <- which(!(gageParamId %in% rmGages)))
##' #nGages <- length(gageParamId)
##' gageParamQThresh1 <- array(c(-100),dim=c(nGages,12,1))
##'
##' ## *** THIS IS THE CORRECT WAY OF FILLING THE ARRAY : KISS ***
##' gageExpCoeff1 <- array(c(1e-38,120),dim=c(nGages,12,2))
##' print(
##' MkNudgingParams(gageId=gageParamId[whGages], R=gageParamR[whGages],
##' G=gageParamG[whGages], tau=gageParamTau[whGages],
##' qThresh=gageParamQThresh1,
##' expCoeff=gageExpCoeff1,
##' outFile=paste0(paramPath,'nudgingParams.conusPstActive.nc'),
##' overwrite=TRUE, rmBlankGages=TRUE)
##' )
##'
##'
##' #array(rep(c(.5,.8),each=4*12),dim=c(4,12,2))
##' }
##'
##' ## the existing parameter file had blanks, remove them.
##' options(warn=1)
##' MkNudgingParams(gageId=gageParamId, R=gageParamR,
##' G=gageParamG, tau=gageParamTau,
##' outFile=paste0(paramPath,'nudgingParams.rwValid5.rmBlanks.nc'),
##' overwrite=TRUE, rmBlankGages=TRUE)
##'
##'
##' ## In this example the exponent only depends on threshold, not location nor month.
##' gageParamqThresh1 = array(rep(c(.5,.8),each=4*12),dim=c(4,12,2))
##'
##' MkNudgingParams(gageId=gageParams$gageId, R=gageParams$R,
##' G=gageParams$G, tau=gageParams$tau,
##' outFile=paste0(paramPath,'nudgingParams.rwValid5.persistence.nc'),
##' overwrite=TRUE, rmBlankGages=TRUE)
##' } #dontrun
##' @keywords manip IO
##' @concept dataMgmt nudging
##' @family nudging
##' @export
MkNudgingParams <- function(gageId, R, G, tau,
qThresh=NULL,
expCoeff=NULL,
outFile, overwrite=FALSE,
rmBlankGages=TRUE) {
if(file.exists(outFile) & !overwrite) {
warning(paste0('File ',outFile,' exists and overwrite=FALSE, returning.'))
return('')
}
# A constructor, sorta. easy way to check the inputs.
gageId <- formatC(gageId, width=15)
gageParams <- data.frame(gageId=gageId, R=R, G=G, tau=tau, stringsAsFactors = FALSE)
whBlank <- which(trimws(gageParams$gageId)=='')
if(length(whBlank)) {
warning("Blanks found in the input gage list")
if(rmBlankGages) {
warning('Removing blank gages from entries of all variables')
gageParams <- gageParams[-whBlank,]
if(!is.null(qThresh) | !is.null(expCoeff)) {
qThresh <- qThresh[-whBlank, , , drop=FALSE]
expCoeff <- expCoeff[-whBlank, , , drop=FALSE]
}
}
}
## need to set the missing value used by ncdf4? i think it's NA by default
dimensionList <-
list( # n.b. the dimension order: z,y,x,t
stationIdInd=list(name='stationIdInd',
units='',
values=1:nrow(gageParams),
unlimited=TRUE,
create_dimvar=FALSE),
stationIdStrLen=list(name='stationIdStrLen',
units='',
values=1:15,
unlimited=FALSE,
create_dimvar=FALSE)
)
if(!is.null(qThresh) | !is.null(expCoeff)) {
if(is.null(qThresh) | is.null(expCoeff)) {
warning("Both thresh and expCoeff must be defined if one of them is. Returning")
return(NULL)
}
if(!all((dim(qThresh)+c(0,0,1)) == dim(expCoeff) )) {
warning("Variables qThresh and expCoeff must have the same dimensions. Returning")
return(NULL)
}
if(dim(expCoeff)[1] != nrow(gageParams)) {
warning("First dimension of expCoeff & qThresh must equal length of gageId")
if(length(whBlank) & rmBlankGages) {
warning(paste0('Removing blank gages may have resulted in dimension ',
'problems with qThresh and expCoeff.'))
return(NULL)
}
}
if(dim(expCoeff)[2] != 12){
warning("Second dimension of expCoeff & qThresh must be of length 12 (months).")
return(NULL)
}
dimensionList[[3]] <- list(name='monthInd',
units='month',
values=1:12,
unlimited=FALSE,
create_dimvar=FALSE)
dimensionList[[4]] <- list(name='threshInd',
units='m^3/s',
values=1:(dim(qThresh)[3]),
unlimited=FALSE,
create_dimvar=FALSE)
dimensionList[[5]] <- list(name='threshCatInd',
units='m^3/s',
values=1:(dim(expCoeff)[3]),
unlimited=FALSE,
create_dimvar=FALSE)
names(dimensionList)[c(3,4,5)] <- c('monthInd','threshInd','threshCatInd')
}
varList = list()
varList[[1]] <-
list( name='stationId',
longname='USGS station identifer',
units='-',
precision = 'char',
#missing = ,
dimensionList=dimensionList[c('stationIdStrLen','stationIdInd')],
data = gageParams$gageId )
varList[[2]] <-
list( name='R',
longname='Radius of influence in meters',
units='meters',
precision = 'float',
#missing = ,
dimensionList=dimensionList[c('stationIdInd')],
data = gageParams$R )
varList[[3]] <-
list( name='G',
longname='Amplitude of nudging',
units='-',
precision = 'float',
#missing = ,
dimensionList=dimensionList[c('stationIdInd')],
data = gageParams$G )
varList[[4]] <-
list( name='tau',
longname='Time tapering parameter half window size in minutes',
units='minutes',
precision = 'float',
#missing = ,
dimensionList=dimensionList[c('stationIdInd')],
data = gageParams$tau )
if(!is.null(qThresh) | !is.null(expCoeff)) {
varList[[5]] <-
list( name='qThresh',
longname='Discharge threshold category',
units='m^3/s',
precision = 'float',
##missing = ,
dimensionList=dimensionList[c('threshInd','monthInd','stationIdInd')],
#dimensionList=dimensionList[c('stationIdInd','monthInd','threshInd')],
data = qThresh )
varList[[6]] <-
list( name='expCoeff',
longname='Coefficient b in denominator e^(-dt/b)',
units='minutes',
precision = 'float',
##missing = ,
dimensionList=dimensionList[c('threshCatInd','monthInd','stationIdInd')],
#dimensionList=dimensionList[c('stationIdInd','monthInd','threshCatInd')],
data = expCoeff )
}
MkNcdf(varList, filename=outFile, overwrite=overwrite)
ncdump(outFile)
invisible(outFile)
}
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