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)).