[R] trends for georeferenced spatial global grid

[Antonio Rodriges]

Hello,

There is a task to derive a linear trend, for ex. 5 units/month for
values located at the georeferenced global latidute-longitude grid.
There are several grids corresponding to time steps, say for a month
with 6 hour interval.

Sure, one can create a loop and derive a trend value for each data point.
Is there a better practice for this task to express it in a line or
two or a dedicated package?

Thank you

-- 
Kind regards,
Antonio Rodriges