R raster predict using lm() time series

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I try to make a prediction in raster using linear regression based on past rasters.

I get: Error in UseMethod("predict"): no applicable method for 'predict' applied to an object of class "data.frame"

How could I capture the lm() model to feed it to predict()?

## calculate regression in a raster stack (time series)# and predict.#require(raster)require(rgdal)# make the list of rastersrasters