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Select and filter LAGOSNE data

Source: R/select.R
lagosne_select.Rd

Select and filter LAGOSNE data with keyword helpers.

Usage

lagosne_select(
  table = NULL,
  vars = NULL,
  categories = NULL,
  dt = lagosne_load(lagosne_version())
)

Arguments

table

character name of a dt table

vars

character vector of specific column names to select from table

categories

what type of variables should be kept. Note not all scale-category options are available. Variable categories include:

  • "waterquality" - includes all in-situ chemistry, chlorophyll, and water clarity measurements from the epi_nutr table.

  • "deposition" - all atmospheric deposition variables from the .chag tables

  • "hydrology" - baseflow, groundwater, runoff, and overland flow variables from the .chag tables

  • "climate" - 30-year normal precipitation and temperature variables from the .chag tables

  • "geology" - all surficial geology variables from the .chag tables

  • "topography" - Terrain Roughness Index and slope variables from the .lulc tables

  • "lulc1992" - all 1992 land use/land cover variables from the .lulc tables

  • "lulc2001" - all 2001 land use/land cover variables from the .lulc tables

  • "lulc2006" - all 2006 land use/land cover variables from the .lulc tables

  • "lulc2011" - all 2011 land use/land cover variables from the .lulc tables

  • "lakes" - all lake connectivity metrics from the .conn tables

  • "wetlands" - all wetland connectivity metrics from the .conn tables

  • "streams" - all stream/river connectivity metrics from the .conn tables

dt

data.frame of local copy of LAGOSNE data. Can be loaded with lagosne_load and will use version as specified in lagosne_version.

Examples

if (FALSE) {
dt <- lagosne_load("1.087.3")

# specific variables
head(lagosne_select(table = "epi_nutr", vars = c("tp", "tn")))
head(lagosne_select(table = "iws.lulc", vars = c("iws_nlcd2011_pct_95")))

# categories
head(lagosne_select(table = "epi_nutr", categories = "waterquality"))
head(lagosne_select(table = "county.chag", categories = "hydrology"))
head(lagosne_select(table = "hu4.chag", categories = "deposition"))

# mix of specific variables and categories
head(lagosne_select(table = "epi_nutr", vars = "lagoslakeid", categories = c("waterquality")))

}