Process input stars to legacy data format

Convert stars object into a tibble with variable names recogniced by the fitters.

Usage

tj_stars_to_data(x, timevar = "z", attrvar = "values")

Arguments

x

stars object

timevar

which dimension is time

attrvar

which attribute to keep

Value

A tibble with variables `c_x`, `c_y` for spatial coordinates and `time` for temporal coordinates, `col,row` for the top-bottom - left-right indices in the data matrix, `cell` as described above, and `value` for the values of the chosen attribute.

The output also has an attribute grid=c(nrow, ncol).

Details

This is essentially a wrapper for the as_tibble-method of stars-objects. The difference is that only one attribute will be kept, chosen with `attrvar`. We assume that spatial dimensions have names 'x' and 'y', and time dimension is defined by `timevar`.

The function adds a cell number in the same way `terra::as.data.frame` does: Spatially top-to-bottom, then left to right. That means cell=1 is for the cell with coordinate (min(x), max(y)), and last cell is (max(x), min(y)).