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#'Save objects of class 's2dv_cube' to data in NetCDF format
#'
#'@author Perez-Zanon Nuria, \email{nuria.perez@bsc.es}
#'
#'@description This function allows to divide and save a object of class
#''s2dv_cube' into a NetCDF file, allowing to reload the saved data using
#'\code{Start} function from StartR package. If the original 's2dv_cube' object
#'has been created from \code{CST_Load()}, then it can be reloaded with
#'@param data An object of class \code{s2dv_cube}.
#'@param destination A character string containing the directory name in which
#' to save the data. NetCDF file for each starting date are saved into the
#' folder tree: \cr
#' destination/Dataset/variable/. By default the function
#' creates and saves the data into the working directory.
#'@param sdate_dim A character string indicating the name of the start date
#' dimension. By default, it is set to 'sdate'. It can be NULL if there is no
#' start date dimension.
#'@param ftime_dim A character string indicating the name of the forecast time
#' dimension. By default, it is set to 'time'. It can be NULL if there is no
#' forecast time dimension.
#'@param dat_dim A character string indicating the name of dataset dimension.
#' By default, it is set to 'dataset'. It can be NULL if there is no dataset
#' dimension.
#'@param var_dim A character string indicating the name of variable dimension.
#' By default, it is set to 'var'. It can be NULL if there is no variable
#' dimension.
#'@param memb_dim A character string indicating the name of the member dimension.
#' By default, it is set to 'member'. It can be NULL if there is no member
#'@param startdates A vector of dates that will be used for the filenames
#' when saving the data in multiple files. It must be a vector of the same
#' length as the start date dimension of data. It must be a vector of class
#' \code{Dates}, \code{'POSIXct'} or character with lenghts between 1 and 10.
#' If it is NULL, the coordinate corresponding the the start date dimension or
#' the first Date of each time step will be used as the name of the files.
#' It is NULL by default.
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#'@param drop_dims A vector of character strings indicating the dimension names
#' of length 1 that need to be dropped in order that they don't appear in the
#' netCDF file. It is NULL by default (optional).
#'@param single_file A logical value indicating if all object is saved in a
#' single file (TRUE) or in multiple files (FALSE). When it is FALSE,
#' the array is separated for Datasets, variable and start date. It is FALSE
#' by default.
#'@param extra_string A character string to be include as part of the file name,
#' for instance, to identify member or realization. It would be added to the
#' file name between underscore characters.
#'@return Multiple or single NetCDF files containing the data array.\cr
#'\item{\code{single_file = TRUE}}{
#' All data is saved in a single file located in the specified destination
#' path with the following name:
#' <variable_name>_<extra_string>_<first_sdate>_<last_sdate>.nc. Multiple
#' variables are saved separately in the same file. The forecast time units
#' is extracted from the frequency of the time steps (hours, days, months).
#' The first value of forecast time is 1. If no frequency is found, the units
#' will be 'hours since' each start date and the time steps are assumed to be
#' equally spaced.
#'}
#'\item{\code{single_file = FALSE}}{
#' The data array is subset and stored into multiple files. Each file
#' contains the data subset for each start date, variable and dataset. Files
#' with different variables and Datasets are stored in separated directories
#' within the following directory tree: destination/Dataset/variable/.
#' The name of each file will be:
#' <variable_name>_<extra_string>_<sdate>.nc.
#'}
#'
#'@seealso \code{\link[startR]{Start}}, \code{\link{as.s2dv_cube}} and
#'\code{\link{s2dv_cube}}
#'CST_SaveExp(data = data, destination = destination, ftime_dim = 'ftime',
#' var_dim = 'var', dat_dim = 'dataset')
CST_SaveExp <- function(data, destination = "./", sdate_dim = 'sdate',
ftime_dim = 'time', dat_dim = 'dataset',
var_dim = 'var', memb_dim = 'member',
startdates = NULL, drop_dims = NULL,
single_file = FALSE, extra_string = NULL,
global_attrs = NULL) {
stop("Parameter 'data' must be of the class 's2dv_cube'.")
# Check object structure
if (!all(c('data', 'attrs') %in% names(data))) {
stop("Parameter 'data' must have at least 'data' and 'attrs' elements ",
"within the 's2dv_cube' structure.")
}
if (!inherits(data$attrs, 'list')) {
stop("Level 'attrs' must be a list with at least 'Dates' element.")
}
if (!all(c('coords') %in% names(data))) {
warning("Element 'coords' not found. No coordinates will be used.")
}
# metadata
if (is.null(data$attrs$Variable$metadata)) {
warning("No metadata found in element Variable from attrs.")
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if (!inherits(data$attrs$Variable$metadata, 'list')) {
stop("Element metadata from Variable element in attrs must be a list.")
}
if (!any(names(data$attrs$Variable$metadata) %in% names(data$coords))) {
warning("Metadata is not found for any coordinate.")
} else if (!any(names(data$attrs$Variable$metadata) %in%
data$attrs$Variable$varName)) {
warning("Metadata is not found for any variable.")
}
}
# Dates
if (is.null(data$attrs$Dates)) {
stop("Element 'Dates' from 'attrs' level cannot be NULL.")
}
if (is.null(dim(data$attrs$Dates))) {
stop("Element 'Dates' from 'attrs' level must have time dimensions.")
}
# sdate_dim
if (!is.null(sdate_dim)) {
if (!is.character(sdate_dim)) {
stop("Parameter 'sdate_dim' must be a character string.")
}
if (length(sdate_dim) > 1) {
warning("Parameter 'sdate_dim' has length greater than 1 and ",
"only the first element will be used.")
sdate_dim <- sdate_dim[1]
}
} else if (length(dim(data$attrs$Dates)) == 1) {
sdate_dim <- 'sdate'
dim(data$data) <- c(sdate = 1, dim(data$data))
data$dims <- dim(data$data)
dim(data$attrs$Dates) <- c(sdate = 1, dim(data$attrs$Dates))
data$coords[[sdate_dim]] <- data$attrs$Dates[1]
}
# startdates
if (is.null(startdates)) {
startdates <- data$coords[[sdate_dim]]
if (!is.character(startdates)) {
warning(paste0("Parameter 'startdates' is not a character string, ",
"it will not be used."))
startdates <- data$coords[[sdate_dim]]
}
if (!is.null(sdate_dim)) {
if (dim(data$data)[sdate_dim] != length(startdates)) {
warning(paste0("Parameter 'startdates' doesn't have the same length ",
"as dimension '", sdate_dim,"', it will not be used."))
startdates <- data$coords[[sdate_dim]]
}
destination = destination,
Dates = data$attrs$Dates,
coords = data$coords,
varname = data$attrs$Variable$varName,
metadata = data$attrs$Variable$metadata,
Datasets = data$attrs$Datasets,
startdates = startdates,
dat_dim = dat_dim, sdate_dim = sdate_dim,
ftime_dim = ftime_dim, var_dim = var_dim,
memb_dim = memb_dim,
drop_dims = drop_dims,
extra_string = extra_string,
single_file = single_file,
global_attrs = global_attrs)
}
#'Save a multidimensional array with metadata to data in NetCDF format
#'@description This function allows to save a data array with metadata into a
#'NetCDF file, allowing to reload the saved data using \code{Start} function
#'from StartR package. If the original 's2dv_cube' object has been created from
#'\code{CST_Load()}, then it can be reloaded with \code{Load()}.
#'
#'@author Perez-Zanon Nuria, \email{nuria.perez@bsc.es}
#'
#'@param data A multi-dimensional array with named dimensions.
#'@param destination A character string indicating the path where to store the
#' NetCDF files.
#'@param Dates A named array of dates with the corresponding sdate and forecast
#' time dimension. If there is no sdate_dim, you can set it to NULL.
#' It must have ftime_dim dimension.
#'@param coords A named list with elements of the coordinates corresponding to
#' the dimensions of the data parameter. The names and length of each element
#' must correspond to the names of the dimensions. If any coordinate is not
#' provided, it is set as an index vector with the values from 1 to the length
#' of the corresponding dimension.
#'@param varname A character string indicating the name of the variable to be
#'@param metadata A named list where each element is a variable containing the
#' corresponding information. The information must be contained in a list of
#' lists for each variable.
#'@param Datasets A vector of character string indicating the names of the
#' datasets.
#'@param startdates A vector of dates that will be used for the filenames
#' when saving the data in multiple files. It must be a vector of the same
#' length as the start date dimension of data. It must be a vector of class
#' \code{Dates}, \code{'POSIXct'} or character with lenghts between 1 and 10.
#' If it is NULL, the first Date of each time step will be used as the name of
#' the files. It is NULL by default.
#'@param sdate_dim A character string indicating the name of the start date
#' dimension. By default, it is set to 'sdate'. It can be NULL if there is no
#' start date dimension.
#'@param ftime_dim A character string indicating the name of the forecast time
#' dimension. By default, it is set to 'time'. It can be NULL if there is no
#' forecast time dimension.
#'@param dat_dim A character string indicating the name of dataset dimension.
#' By default, it is set to 'dataset'. It can be NULL if there is no dataset
#' dimension.
#'@param var_dim A character string indicating the name of variable dimension.
#' By default, it is set to 'var'. It can be NULL if there is no variable
#' dimension.
#'@param memb_dim A character string indicating the name of the member dimension.
#' By default, it is set to 'member'. It can be NULL if there is no member
#' dimension.
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#'@param drop_dims A vector of character strings indicating the dimension names
#' of length 1 that need to be dropped in order that they don't appear in the
#' netCDF file. It is NULL by default (optional).
#'@param single_file A logical value indicating if all object is saved in a
#' unique file (TRUE) or in separated directories (FALSE). When it is FALSE,
#' the array is separated for Datasets, variable and start date. It is FALSE
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#' by default (optional).
#'@param extra_string A character string to be include as part of the file name,
#' for instance, to identify member or realization. It would be added to the
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#' file name between underscore characters (optional).
#'@param global_attrs A list with elements containing the global attributes
#' to be saved in the NetCDF.
#'@return Multiple or single NetCDF files containing the data array.\cr
#'\item{\code{single_file = TRUE}}{
#' All data is saved in a single file located in the specified destination
#' path with the following name:
#' <variable_name>_<extra_string>_<first_sdate>_<last_sdate>.nc. Multiple
#' variables are saved separately in the same file. The forecast time units
#' is extracted from the frequency of the time steps (hours, days, months).
#' The first value of forecast time is 1. If no frequency is found, the units
#' will be 'hours since' each start date and the time steps are assumed to be
#' equally spaced.
#'}
#'\item{\code{single_file = FALSE}}{
#' The data array is subset and stored into multiple files. Each file
#' contains the data subset for each start date, variable and dataset. Files
#' with different variables and Datasets are stored in separated directories
#' within the following directory tree: destination/Dataset/variable/.
#' The name of each file will be:
#' <variable_name>_<extra_string>_<sdate>.nc.
#'}
#'data <- lonlat_temp_st$exp$data
#'lon <- lonlat_temp_st$exp$coords$lon
#'lat <- lonlat_temp_st$exp$coords$lat
#'Datasets <- lonlat_temp_st$exp$attrs$Datasets
#'Dates <- lonlat_temp_st$exp$attrs$Dates
#'metadata <- lonlat_temp_st$exp$attrs$Variable$metadata
#'SaveExp(data = data, destination = destination, coords = coords,
#' Datasets = Datasets, varname = varname, Dates = Dates,
#' metadata = metadata, single_file = TRUE, ftime_dim = 'ftime',
#' var_dim = 'var', dat_dim = 'dataset')
#'@importFrom s2dv Reorder
#'@import multiApply
#'@importFrom ClimProjDiags Subset
SaveExp <- function(data, destination = "./", Dates = NULL, coords = NULL,
varname = NULL, metadata = NULL, Datasets = NULL,
startdates = NULL, dat_dim = 'dataset', sdate_dim = 'sdate',
ftime_dim = 'time', var_dim = 'var', memb_dim = 'member',
drop_dims = NULL, single_file = FALSE, extra_string = NULL,
global_attrs = NULL) {
## Initial checks
# data
if (is.null(data)) {
stop("Parameter 'data' cannot be NULL.")
}
dimnames <- names(dim(data))
if (is.null(dimnames)) {
stop("Parameter 'data' must be an array with named dimensions.")
}
# destination
if (!is.character(destination) | length(destination) > 1) {
stop("Parameter 'destination' must be a character string of one element ",
"indicating the name of the file (including the folder if needed) ",
"where the data will be saved.")
}
# Dates
if (!is.null(Dates)) {
if (!inherits(Dates, "POSIXct") & !inherits(Dates, "Date")) {
stop("Parameter 'Dates' must be of 'POSIXct' or 'Dates' class.")
}
if (is.null(dim(Dates))) {
stop("Parameter 'Dates' must have dimension names.")
}
}
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# drop_dims
if (!is.null(drop_dims)) {
if (!is.character(drop_dims) | any(!drop_dims %in% names(dim(data)))) {
warning("Parameter 'drop_dims' must be character string containing ",
"the data dimension names to be dropped. It will not be used.")
} else if (!all(dim(data)[drop_dims] %in% 1)) {
warning("Parameter 'drop_dims' can only contain dimension names ",
"that are of length 1. It will not be used.")
} else if (any(drop_dims %in% c(ftime_dim, sdate_dim, dat_dim, memb_dim, var_dim))) {
warning("Parameter 'drop_dims' contains dimensions used in the computation. ",
"It will not be used.")
drop_dims <- NULL
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} else {
data <- Subset(x = data, along = drop_dims,
indices = lapply(1:length(drop_dims), function(x) 1),
drop = 'selected')
dimnames <- names(dim(data))
}
}
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# coords
if (!is.null(coords)) {
if (!all(names(coords) %in% dimnames)) {
coords <- coords[-which(!names(coords) %in% dimnames)]
}
for (i_coord in dimnames) {
if (i_coord %in% names(coords)) {
if (length(coords[[i_coord]]) != dim(data)[i_coord]) {
warning(paste0("Coordinate '", i_coord, "' has different lenght as ",
"its dimension and it will not be used."))
coords[[i_coord]] <- 1:dim(data)[i_coord]
}
} else {
coords[[i_coord]] <- 1:dim(data)[i_coord]
}
}
} else {
coords <- sapply(dimnames, function(x) 1:dim(data)[x])
}
# varname
if (is.null(varname)) {
varname <- 'X'
} else if (length(varname) > 1) {
multiple_vars <- TRUE
} else {
multiple_vars <- FALSE
}
if (!all(sapply(varname, is.character))) {
stop("Parameter 'varname' must be a character string with the ",
"variable names.")
}
# single_file
if (!inherits(single_file, 'logical')) {
warning("Parameter 'single_file' must be a logical value. It will be ",
"set as FALSE.")
single_file <- FALSE
if (!is.null(extra_string)) {
if (!is.character(extra_string)) {
stop("Parameter 'extra_string' must be a character string.")
}
}
# global_attrs
if (!is.null(global_attrs)) {
if (!inherits(global_attrs, 'list')) {
stop("Parameter 'global_attrs' must be a list.")
}
}
## Dimensions checks
# Spatial coordinates
if (!any(dimnames %in% .KnownLonNames()) |
!any(dimnames %in% .KnownLatNames())) {
lon_dim <- NULL
lat_dim <- NULL
} else {
lon_dim <- dimnames[which(dimnames %in% .KnownLonNames())]
lat_dim <- dimnames[which(dimnames %in% .KnownLatNames())]
}
# ftime_dim
if (!is.null(ftime_dim)) {
if (!is.character(ftime_dim)) {
stop("Parameter 'ftime_dim' must be a character string.")
}
if (!all(ftime_dim %in% dimnames)) {
stop("Parameter 'ftime_dim' is not found in 'data' dimension. Set it ",
"as NULL if there is no forecast time dimension.")
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}
}
# sdate_dim
if (!is.null(sdate_dim)) {
if (!is.character(sdate_dim)) {
stop("Parameter 'sdate_dim' must be a character string.")
}
if (!all(sdate_dim %in% dimnames)) {
stop("Parameter 'sdate_dim' is not found in 'data' dimension.")
}
}
# memb_dim
if (!is.null(memb_dim)) {
if (!is.character(memb_dim)) {
stop("Parameter 'memb_dim' must be a character string.")
}
if (!all(memb_dim %in% dimnames)) {
stop("Parameter 'memb_dim' is not found in 'data' dimension. Set it ",
"as NULL if there is no member dimension.")
}
}
# dat_dim
if (!is.null(dat_dim)) {
if (!is.character(dat_dim)) {
stop("Parameter 'dat_dim' must be a character string.")
}
if (!all(dat_dim %in% dimnames)) {
stop("Parameter 'dat_dim' is not found in 'data' dimension. Set it ",
"as NULL if there is no Datasets dimension.")
}
if (length(dat_dim) > 1) {
warning("Parameter 'dat_dim' has length greater than 1 and ",
"only the first element will be used.")
dat_dim <- dat_dim[1]
}
n_datasets <- dim(data)[dat_dim]
} else {
n_datasets <- 1
}
# var_dim
if (!is.null(var_dim)) {
if (!is.character(var_dim)) {
stop("Parameter 'var_dim' must be a character string.")
}
if (!all(var_dim %in% dimnames)) {
stop("Parameter 'var_dim' is not found in 'data' dimension. Set it ",
"as NULL if there is no variable dimension.")
}
n_vars <- dim(data)[var_dim]
} else {
n_vars <- 1
}
# minimum dimensions
if (all(dimnames %in% c(var_dim, dat_dim))) {
if (!single_file) {
warning("Parameter data has only ",
paste(c(var_dim, dat_dim), collapse = ' and '), " dimensions ",
"and it cannot be splitted in multiple files. All data will ",
"be saved in a single file.")
single_file <- TRUE
}
}
# Dates dimension check
if (!is.null(Dates)) {
if (is.null(ftime_dim)) {
stop("Parameter 'Dates' must have 'ftime_dim'.")
}
if (all(c(ftime_dim, sdate_dim) %in% names(dim(Dates)))) {
if (any(!names(dim(Dates)) %in% c(ftime_dim, sdate_dim))) {
if (all(dim(Dates)[!names(dim(Dates)) %in% c(ftime_dim, sdate_dim)] == 1)) {
dim(Dates) <- dim(Dates)[names(dim(Dates)) %in% c(ftime_dim, sdate_dim)]
} else {
stop("Parameter 'Dates' must have only 'sdate_dim' and 'ftime_dim' dimensions.")
}
}
if (is.null(startdates)) {
startdates <- Subset(Dates, along = ftime_dim, 1, drop = 'selected')
} else if (any(inherits(startdates, "POSIXct"), inherits(startdates, "Date"))) {
startdates <- format(startdates, "%Y%m%d")
} else if (any(nchar(startdates) > 10, nchar(startdates) < 1)) {
warning("Parameter 'startdates' should be a character string containing ",
"the start dates in the format 'yyyy-mm-dd', 'yyyymmdd', 'yyyymm', ",
"'POSIXct' or 'Dates' class. Files will be named with Dates instead.")
startdates <- Subset(Dates, along = ftime_dim, 1, drop = 'selected')
} else if (any(ftime_dim %in% names(dim(Dates)))) {
if (all(dim(Dates)[!names(dim(Dates)) %in% c(ftime_dim)] == 1)) {
dim(Dates) <- dim(Dates)[names(dim(Dates)) %in% c(ftime_dim, sdate_dim)]
}
} else if (!single_file) {
warning("Dates must be provided if 'data' must be saved in separated files. ",
"All data will be saved in a single file.")
single_file <- TRUE
}
# startdates
if (is.null(startdates)) {
if (is.null(sdate_dim)) {
startdates <- 'XXX'
} else {
startdates <- rep('XXX', dim(data)[sdate_dim])
}
}
# Datasets
if (is.null(Datasets)) {
Datasets <- rep('XXX', n_datasets )
if (inherits(Datasets, 'list')) {
Datasets <- names(Datasets)
if (n_datasets > length(Datasets)) {
warning("Dimension 'Datasets' in 'data' is greater than those listed in ",
"element 'Datasets' and the first element will be reused.")
Datasets <- c(Datasets, rep(Datasets[1], n_datasets - length(Datasets)))
} else if (n_datasets < length(Datasets)) {
warning("Dimension 'Datasets' in 'data' is smaller than those listed in ",
"element 'Datasets' and only the firsts elements will be used.")
Datasets <- Datasets[1:n_datasets]
## Unknown dimensions check
alldims <- c(dat_dim, var_dim, sdate_dim, lon_dim, lat_dim, memb_dim, ftime_dim)
if (!all(dimnames %in% alldims)) {
unknown_dims <- dimnames[which(!dimnames %in% alldims)]
memb_dim <- c(memb_dim, unknown_dims)
alldims <- c(dat_dim, var_dim, sdate_dim, lon_dim, lat_dim, memb_dim, ftime_dim)
}
# Reorder
if (any(dimnames != alldims)) {
data <- Reorder(data, alldims)
dimnames <- names(dim(data))
if (!is.null(attr(data, 'dimensions'))) {
attr(data, 'dimensions') <- dimnames
}
}
## NetCDF dimensions definition
defined_dims <- NULL
extra_info_dim <- NULL
if (is.null(Dates)) {
filedims <- dimnames[which(!dimnames %in% c(dat_dim, var_dim))]
} else {
filedims <- dimnames[which(!dimnames %in% c(dat_dim, var_dim, sdate_dim, ftime_dim))]
}
for (i_coord in filedims) {
# vals
if (i_coord %in% names(coords)) {
if (is.numeric(coords[[i_coord]])) {
coords[[i_coord]] <- as.vector(coords[[i_coord]])
coords[[i_coord]] <- 1:dim(data)[i_coord]
}
dim(coords[[i_coord]]) <- dim(data)[i_coord]
## metadata
if (i_coord %in% names(metadata)) {
if ('variables' %in% names(attributes(metadata[[i_coord]]))) {
# from Start: 'lon' or 'lat'
attrs <- attributes(metadata[[i_coord]])[['variables']]
attr(coords[[i_coord]], 'variables') <- attrs
} else if (inherits(metadata[[i_coord]], 'list')) {
# from Start and Load: main var
attr(coords[[i_coord]], 'variables') <- list(metadata[[i_coord]])
names(attributes(coords[[i_coord]])$variables) <- i_coord
} else if (!is.null(attributes(metadata[[i_coord]]))) {
# from Load
attr(coords[[i_coord]], 'variables') <- list(attributes(metadata[[i_coord]]))
names(attributes(coords[[i_coord]])$variables) <- i_coord
} else {
stop("Metadata is not correct.")
}
# Reorder coords
coords[c(names(coords)[!names(coords) %in% filedims])] <- NULL
coords <- coords[filedims]
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defined_vars <- list()
if (!single_file) {
for (i in 1:n_datasets) {
path <- file.path(destination, Datasets[i], varname)
for (j in 1:n_vars) {
dir.create(path[j], recursive = TRUE)
startdates <- gsub("-", "", startdates)
dim(startdates) <- c(length(startdates))
names(dim(startdates)) <- sdate_dim
if (is.null(dat_dim) & is.null(var_dim)) {
data_subset <- data
} else if (is.null(dat_dim)) {
data_subset <- Subset(data, c(var_dim), list(j), drop = 'selected')
} else if (is.null(var_dim)) {
data_subset <- Subset(data, along = c(dat_dim), list(i), drop = 'selected')
} else {
data_subset <- Subset(data, c(dat_dim, var_dim), list(i, j), drop = 'selected')
}
if (is.null(Dates)) {
input_data <- list(data_subset, startdates)
target_dims <- list(c(lon_dim, lat_dim, memb_dim, ftime_dim), NULL)
} else {
input_data <- list(data_subset, startdates, Dates)
target_dims = list(c(lon_dim, lat_dim, memb_dim, ftime_dim), NULL, ftime_dim)
}
Apply(data = input_data,
target_dims = target_dims,
ftime_dim = ftime_dim,
varname = varname[j],
metadata_var = metadata[[varname[j]]],
extra_string = extra_string,
global_attrs = global_attrs)
}
}
} else {
# Datasets definition
# From here
if (!is.null(dat_dim)) {
coords[[dat_dim]] <- array(1:dim(data)[dat_dim], dim = dim(data)[dat_dim])
attr(coords[[dat_dim]], 'variables') <- list(list(units = 'adim'))
# extra_info_dim[[dat_dim]] <- list(Datasets = paste(Datasets, collapse = ', '))
first_sdate <- last_sdate <- NULL
if (is.null(sdate_dim)) {
sdates <- Dates[1]
# ftime definition
leadtimes <- as.numeric(difftime(Dates, sdates, units = "hours"))
# sdate definition
sdates <- Subset(Dates, along = ftime_dim, 1, drop = 'selected')
differ <- as.numeric(difftime(sdates, sdates[1], units = "hours"))
# new
dim(differ) <- dim(data)[sdate_dim]
coords[[sdate_dim]] <- differ
attr(coords[[sdate_dim]], 'variables') <- list(list(units = paste('hours since', sdates[1]),
calendar = 'proleptic_gregorian',
longname = sdate_dim))
first_sdate <- sdates[1]
last_sdate <- sdates[length(sdates)]
# ftime definition
Dates <- Reorder(Dates, c(ftime_dim, sdate_dim))
differ_ftime <- array(dim = dim(Dates))
for (i in 1:length(sdates)) differ_ftime[, i] <- as.numeric(difftime(Dates[, i], Dates[1, i],
units = "hours"))
dim(differ_ftime) <- dim(Dates)
leadtimes <- Subset(differ_ftime, along = sdate_dim, 1, drop = 'selected')
if (!all(apply(differ_ftime, 1, function(x){length(unique(x)) == 1}))) {
warning("Time steps are not equal for all start dates. Only ",
"forecast time values for the first start date will be saved ",
"correctly.")
}
# Save in units 'hours since'
dim(leadtimes) <- dim(data)[ftime_dim]
coords[[ftime_dim]] <- leadtimes
attr(coords[[ftime_dim]], 'variables') <- list(list(units = paste('hours since',
paste(sdates, collapse = ', ')),
calendar = 'proleptic_gregorian',
longname = ftime_dim, unlim = TRUE))
}
# var definition
defined_vars <- list()
extra_info_var <- NULL
for (j in 1:n_vars) {
varname_j <- varname[j]
metadata_j <- metadata[[varname_j]]
if (is.null(var_dim)) {
coords[[varname_j]] <- data
coords[[varname_j]] <- Subset(data, var_dim, j, drop = 'selected')
if (!is.null(metadata_j)) {
attr(coords[[varname_j]], 'variables') <- list(metadata_j)
names(attributes(coords[[varname_j]])$variables) <- varname_j
# Add global attributes
if (!is.null(global_attrs)) {
attributes(coords[[varname_j]])$global_attrs <- global_attrs
gsub("-", "", first_sdate)
file_name <- paste0(paste(c(varname,
gsub("-", "", first_sdate),
gsub("-", "", last_sdate)),
collapse = '_'), ".nc")
nc <- substr(extra_string, nchar(extra_string)-2, nchar(extra_string))
if (nc == ".nc") {
file_name <- extra_string
} else {
file_name <- paste0(extra_string, ".nc")
full_filename <- file.path(destination, file_name)
ArrayToNc(coords, full_filename)
.saveexp <- function(data, coords, destination = "./",
startdates = NULL, dates = NULL,
ftime_dim = 'time', varname = 'var',
metadata_var = NULL, extra_string = NULL,
global_attrs = NULL) {
differ <- as.numeric(difftime(dates, dates[1], units = "hours"))
dim(differ) <- dim(data)[ftime_dim]
coords[[ftime_dim]] <- differ
attr(coords[[ftime_dim]], 'variables') <- list(list(units = paste('hours since', dates[1]),
calendar = 'proleptic_gregorian',
longname = ftime_dim, unlim = TRUE))
names(attributes(coords[[ftime_dim]])$variables) <- ftime_dim
}
# Add data
coords[[varname]] <- data
if (!is.null(metadata_var)) {
metadata_var$dim <- NULL
attr(coords[[varname]], 'variables') <- list(metadata_var)
names(attributes(coords[[varname]])$variables) <- varname
}
# Add global attributes
if (!is.null(global_attrs)) {
attributes(coords[[varname]])$global_attrs <- global_attrs
file_name <- paste0(varname, "_", startdates, ".nc")
file_name <- paste0(varname, "_", extra_string, "_", startdates, ".nc")
full_filename <- file.path(destination, file_name)