incorrect number of dimensions

Hi I'm getting this error, I was wondering if anyone could help. (error occurs when last line is run).

Error in xy[, 3] : incorrect number of dimensions

The was original a csv made into a sp object.

I’ve tried <- st_transform(, tempcrs) I get Error in UseMethod("st_transform") :

no applicable method for 'st_transform' applied to an object of class "data.frame"

Is there a way in figuring out what dimensions I should be using?

Any help is greatly appreciated. Thank you.

R script:

make a raster grid and set its resolution & widen its extent

r <- raster(

res(r) <- 0.01

r <- extend(r, extent(r)+1)


p.dat.s <- SpatialPointsDataFrame(p.dat[1:2], p.dat[3:7])

crs(p.dat.s) <- CRS('+proj=longlat +datum=WGS84')

p.dat.s <- spTransform(p.dat.s, newcrs)

take a sample of the points

pres.dat <- data.frame(gridSample(p.dat.s, r, 1))

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