Nothing
get_new_dimension <- function(dimension, grid_box_dimension, amount_grid_box, size_modulo) {
counter <- grid_box_dimension
counter_start <- 1
result_vector <- c()
for(i in 1:amount_grid_box) {
if(size_modulo != 0 & i == amount_grid_box){
if(size_modulo != 1){
counter <- counter - grid_box_dimension + size_modulo
lat_new <- dimension[counter_start] + (dimension[counter]-dimension[counter_start])/2
result_vector <- append(result_vector, lat_new)
}
else{
result_vector <- append(result_vector, dimension[counter_start])
}
}
else{
lat_new <- dimension[counter_start] + (dimension[counter]-dimension[counter_start])/2
result_vector <- append(result_vector, lat_new)
counter <- counter + grid_box_dimension
counter_start <- counter_start + grid_box_dimension
}
}
return(result_vector)
}
get_data_grid_operator <- function(op, data_operator, j, verbose) {
switch(op,
{
if (verbose) message(paste0("apply gridbox maximum ", j))
ifelse( !all(is.na(data_operator)), # only if all values are na, write na
{
result_value <- max(data_operator, na.rm = TRUE)
},
{
result_value <- max(data_operator, na.rm = FALSE)
})
},
{
if (verbose) message(paste0("apply gridbox minimum ", j))
ifelse( !all(is.na(data_operator)), # only if all values are na, write na
{
result_value <- min(data_operator, na.rm = TRUE)
},
{
result_value <- min(data_operator, na.rm = FALSE)
})
},
{
if (verbose) message(paste0("apply gridbox range ", j))
# max function
ifelse( !all(is.na(data_operator)), # only if all values are na, write na
{
data_max <- max(data_operator, na.rm = TRUE)
},
{
data_max <- max(data_operator, na.rm = FALSE)
})
# min function
ifelse( !all(is.na(data_operator)), # only if all values are na, write na
{
data_min <- min(data_operator, na.rm = TRUE)
},
{
data_min <- min(data_operator, na.rm = FALSE)
})
result_value <- data_max - data_min
},
{
if (verbose) message(paste0("apply gridbox sum ", j))
result_value <- sum(data_operator, na.rm = TRUE)
},
{
if (verbose) message(paste0("apply gridbox mean ", j))
result_value <- mean(data_operator, na.rm = TRUE)
},
{
if (verbose) message(paste0("apply gridbox standard deviation ", j))
result_value <- stats::sd(data_operator, na.rm = TRUE)
},
{
if (verbose) message(paste0("apply gridbox variance ", j))
result_value <- (stats::sd(data_operator, na.rm = TRUE))^2
}
)
return(result_value)
}
gridboxx_wrapper <- function(op, var, lonGrid, latGrid, infile, outfile, nc34, overwrite, verbose,
nc = NULL) {
calc_time_start <- Sys.time()
gc()
if((lonGrid %% 1 == 0) & (latGrid %% 1 == 0)) {
check_variable(var)
if (is.null(nc)) check_infile(infile)
check_outfile(outfile)
outfile <- correct_filename(outfile)
check_overwrite(outfile, overwrite)
check_nc_version(nc34)
##### extract data from file #####
file_data <- read_file(infile, var, nc = nc)
if (op > 2) {
file_data$variable$prec <- "float"
}
dateID <- unique(file_data$dimension_data$t)
lonSize <- length(file_data$dimension_data$x)
latSize <- length(file_data$dimension_data$y)
# error messages
if(lonSize < lonGrid && latSize < latGrid)
stop("The index for the longitude and for the latitude is greater than in the data. Please choose a smaller index. ")
else if(lonSize < lonGrid)
stop("The index for the longitude is greater than in the data. Please choose a smaller index for the longitude. ")
else if(latSize < latGrid)
stop("The index for the latitude is greater than in the data. Please choose a smaller index for the latitude. ")
else if(lonGrid <= 0 || latGrid <= 0)
stop("The index must be greater than zero. ")
else if(round(lonGrid) != lonGrid || round(latGrid) != latGrid)
stop("Please use integer values for the index. ")
lonSizeModulo <- lonSize %% lonGrid
latSizeModulo <- latSize %% latGrid
lonGridBoxes <- (lonSize - lonSizeModulo)/lonGrid
latGridBoxes <- (latSize - latSizeModulo)/latGrid
if(latSizeModulo != 0){
latGridBoxes <- latGridBoxes + 1
}
if(lonSizeModulo != 0){
lonGridBoxes <- lonGridBoxes + 1
}
result_vector_x <- get_new_dimension(file_data$dimension_data$x, lonGrid, lonGridBoxes, lonSizeModulo)
result_vector_y <- get_new_dimension(file_data$dimension_data$y, latGrid, latGridBoxes, latSizeModulo)
# Use placeholder for result so that it can be calculated later without the
# need to have all input data in memory concurrently.
data_placeholder <- array(
file_data$variable$attributes$missing_value,
dim = c(length(result_vector_x),
length(result_vector_y),
length(dateID))
)
vars_data <- list(result = data_placeholder, time_bounds = file_data$dimension_data$t)
nc_format <- get_nc_version(nc34)
cmsaf_info <- switch(
op,
paste0("cmsafops::gridboxmax for variable ", file_data$variable$name),
paste0("cmsafops::gridboxmin for variable ", file_data$variable$name),
paste0("cmsafops::gridboxrange for variable ", file_data$variable$name),
paste0("cmsafops::gridboxsum for variable ", file_data$variable$name),
paste0("cmsafops::gridboxmean for variable ", file_data$variable$name),
paste0("cmsafops::gridboxsd for variable ", file_data$variable$name),
paste0("cmsafops::gridboxvar for variable ", file_data$variable$name)
)
##### prepare output #####
global_att_list <- names(file_data$global_att)
global_att_list <- global_att_list[toupper(global_att_list) %in% toupper(GLOBAL_ATT_DEFAULT)]
global_attributes <- file_data$global_att[global_att_list]
dims <- define_dims(file_data$grid$is_regular,
result_vector_x,
result_vector_y,
file_data$dimension_data$t,
NB2,
file_data$time_info$units,
with_time_bnds = FALSE)
vars <- define_vars(file_data$variable, dims, nc_format$compression, with_time_bnds = FALSE)
write_output_file(
outfile,
nc_format$force_v4,
vars,
vars_data,
file_data$variable$name,
file_data$grid$vars, file_data$grid$vars_data,
cmsaf_info,
file_data$time_info$calendar,
file_data$variable$attributes,
global_attributes,
with_time_bnds = FALSE
)
##### calculate and write result #####
nc_out <- nc_open(outfile, write = TRUE)
if (!is.null(nc)) nc_in <- nc
else nc_in <- nc_open(infile)
for (j in seq_along(dateID)) {
dum_dat <- ncvar_get(nc_in, file_data$variable$name, start = c(1, 1, j), count = c(-1, -1, 1), collapse_degen = FALSE)
startGridBoxLon <- 1
endGridBoxLon <- lonGrid
startGridBoxLat <- 1
endGridBoxLat <- latGrid
data <- array(numeric(),c(lonGridBoxes, latGridBoxes, 1))
for(lat_index in 1:latGridBoxes){
for(lon_index in 1:lonGridBoxes) {
if(latSizeModulo == 0 && lonSizeModulo == 0){ # if the grid match
dataTemp <- dum_dat[startGridBoxLon:endGridBoxLon, startGridBoxLat:endGridBoxLat, 1]
data[lon_index, lat_index, 1] <- get_data_grid_operator(op, dataTemp, j, verbose)
}
else if(latSizeModulo != 0 && lonSizeModulo == 0) { # if lat not match with grid box
ifelse(lat_index != latGridBoxes,
{
dataTemp <- dum_dat[startGridBoxLon:endGridBoxLon, startGridBoxLat:endGridBoxLat, 1]
data[lon_index, lat_index, 1] <- get_data_grid_operator(op, dataTemp, j, verbose)
},
{
dataTemp <- dum_dat[startGridBoxLon:endGridBoxLon, startGridBoxLat:(endGridBoxLat - latGrid + latSizeModulo), 1]
data[lon_index, lat_index, 1] <- get_data_grid_operator(op, dataTemp, j, verbose)
})
}
else if(latSizeModulo == 0 && lonSizeModulo != 0) { # if lon not match with grid box
ifelse(lon_index != lonGridBoxes,
{
dataTemp <- dum_dat[startGridBoxLon:endGridBoxLon, startGridBoxLat:endGridBoxLat, 1]
data[lon_index, lat_index, 1] <- get_data_grid_operator(op, dataTemp, j, verbose)
},
{
endGridBoxLon <- endGridBoxLon - lonGrid + lonSizeModulo
dataTemp <- dum_dat[startGridBoxLon:endGridBoxLon, startGridBoxLat:endGridBoxLat, 1]
data[lon_index, lat_index, 1] <- get_data_grid_operator(op, dataTemp, j, verbose)
})
}
else if(lonSizeModulo != 0 && latSizeModulo != 0) { # if lon and lat not match with grid box
if (lon_index != lonGridBoxes && lat_index != latGridBoxes) {
dataTemp <- dum_dat[startGridBoxLon:endGridBoxLon, startGridBoxLat:endGridBoxLat, 1]
data[lon_index, lat_index, 1] <- get_data_grid_operator(op, dataTemp, j, verbose)
}
else if(lon_index == lonGridBoxes && lat_index != latGridBoxes) {
endGridBoxLon <- endGridBoxLon - lonGrid + lonSizeModulo
dataTemp <- dum_dat[startGridBoxLon:endGridBoxLon, startGridBoxLat:endGridBoxLat, 1]
data[lon_index, lat_index, 1] <- get_data_grid_operator(op, dataTemp, j, verbose)
}
else if(lon_index != lonGridBoxes && lat_index == latGridBoxes) {
dataTemp <- dum_dat[startGridBoxLon:endGridBoxLon, startGridBoxLat:(endGridBoxLat - latGrid + latSizeModulo), 1]
data[lon_index, lat_index, 1] <- get_data_grid_operator(op, dataTemp, j, verbose)
}
else if(lon_index == lonGridBoxes && lat_index == latGridBoxes) {
endGridBoxLon <- endGridBoxLon - lonGrid + lonSizeModulo
endGridBoxLat <- endGridBoxLat - latGrid + latSizeModulo
dataTemp <- dum_dat[startGridBoxLon:endGridBoxLon, startGridBoxLat:endGridBoxLat, 1]
data[lon_index, lat_index, 1] <- get_data_grid_operator(op, dataTemp, j, verbose)
}
}
startGridBoxLon <- startGridBoxLon + lonGrid
endGridBoxLon <- endGridBoxLon + lonGrid
}
startGridBoxLat <- startGridBoxLat + latGrid
endGridBoxLat <- endGridBoxLat + latGrid
startGridBoxLon <- 1
endGridBoxLon <- lonGrid
}
data[is.na(data)] <- file_data$variable$attributes$missing_value
ncvar_put(nc_out, vars[[1]], data, start = c(1, 1, j), count = c(-1, -1, 1))
}
if (is.null(nc)) nc_close(nc_in)
nc_close(nc_out)
}
else {
stop("The parameters lonGrid and latGrid must be integer values. ")
}
calc_time_end <- Sys.time()
if (verbose) message(get_processing_time_string(calc_time_start, calc_time_end))
}
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