Summarise a raster by latitude

This function summarises the values of a raster across latitudinal bands using a user-supplied function, such as mean.

summarise_by_lat(x, stat = mean)

Arguments

x	A raster.
stat	A function that summarises the values of x across latitudinal bands.

Value

The function returns a dataframe with the latitudinal coordinates of each band (`y') and the summary (`stat'),

Details

This routine is implemented within add_profile_lat.

Author

Edward Lavender

Examples

d <- summarise_by_lat(dat_gebco)
utils::head(d)
#>          y      stat
#> 1 56.34375 174.67772
#> 2 56.34792 149.93881
#> 3 56.35208 117.49825
#> 4 56.35625  86.30392
#> 5 56.36042  56.80203
#> 6 56.36458  42.89903