Split table — split_table • hydrographr

Split the table along a set number of rows into multiple parts of equal length.

Note that duplicated rows will be removed.

Usage

split_table(data, split = NULL, split_tbl_path, read = FALSE, quiet = TRUE)

Arguments

data: a data.frame or data.table
split: numeric. number of rows selected to split the table
split_tbl_path: character. Full path to store the split tables
read: logical. If TRUE, then the split data tables get read into R as a data tables. If FALSE, the tables are only stored on disk. Default is FALSE.
quiet: logical. If FALSE, the standard output will be printed. Default is TRUE.

Author

Jaime Garcia Marquez, Thomas Tomiczek

Examples

# Create data table

df <- data.frame(matrix(ncol = 2, nrow = 10000))
colnames(df) <- c('var1', 'var2')
# or with real data
my_directory <- tempdir()
download_test_data(my_directory)
df <- fread(paste0(my_directory, '/projectionTB.csv'), fill=TRUE)

# Define full path to store split data tables
split_tbl_path <- paste0(my_directory,
                     "/hydrography90m_test_data/")
# Split data table
hydrography90m_ids <- split_table(df, split = 20000, split_tbl_path)

# Show the output table
hydrography90m_ids