from_var_to_var: Functions to get variables from other variables.

In forestgeo/fgeo.tool: Import and Manipulate 'ForestGEO' Data

Functions to get variables from other variables.

Description

These functions wrap their corresponding functions from the CTFS R Package, but these versions are stricter. The main differences are these:

• names use "_" not ".".

• argument gridsize defaults to missing to force the user to provide it.

• If the argument plotdim is missing from functions gxgy_fun(), its value will be guessed and notified.

Usage

rowcol_to_index(rowno, colno, gridsize, plotdim)

index_to_rowcol(index, gridsize, plotdim)

gxgy_to_index(gx, gy, gridsize, plotdim)

gxgy_to_lxly(gx, gy, gridsize, plotdim)

gxgy_to_qxqy(gx, gy, gridsize, plotdim)

gxgy_to_rowcol(gx, gy, gridsize, plotdim)

gxgy_to_hectindex(gx, gy, plotdim)

index_to_gxgy(index, gridsize, plotdim)

Arguments

rowno, colno	Row and column number – as defined in a census plot.
gridsize	The gridsize of the census plot (commonly 20 m).
plotdim	The global dimensions of the census plot (i.e. the maximum possible values of gx and gy).
index	Index number as defined for a census plot.
gx, gy	A number; global x and y position in a census plot.

Details

gxgy_to_qxqy() didn't exist in the original CTFS R Package. Added for consistency.

Value

A vector or dataframe (see examples).

Author(s)

Rick Condit, Suzanne Lao.

Examples

gxgy_to_index(c(0, 400, 990), c(0, 200, 490), gridsize = 20)

gridsize <- 20
plotdim <- c(1000, 500)

x <- gxgy_to_hectindex(1:3, 1:3, plotdim)
x
typeof(x)
is.data.frame(x)
is.vector(x)

x <- gxgy_to_index(1:3, 1:3, gridsize, plotdim)
x
typeof(x)
is.data.frame(x)
is.vector(x)

x <- gxgy_to_lxly(1:3, 1:3, gridsize, plotdim)
x
typeof(x)
is.data.frame(x)
is.vector(x)

x <- gxgy_to_rowcol(1:3, 1:3, gridsize, plotdim)
x
typeof(x)
is.data.frame(x)
is.vector(x)

x <- index_to_rowcol(1:3, gridsize, plotdim)
x
typeof(x)
is.data.frame(x)
is.vector(x)

x <- rowcol_to_index(1:3, 1:3, gridsize, plotdim)
x
typeof(x)
is.data.frame(x)
is.vector(x)

index_to_gxgy(1:3, gridsize, plotdim)

forestgeo/fgeo.tool documentation built on Sept. 11, 2022, 1:44 a.m.