Hi, and welcome!
Please see the FAQ: What's a reproducible example (`reprex`) and how do I do one? Using a reprex, complete with representative data will attract quicker and more answers. This isn't yet a coding question so it doesn't apply.
Still, it's easy to assume when asking a question the possibility that those reading it might not actually understand the world of ArcGIS and what las files are and what R tools are being used to fetch the catalog object.
So, I can only offer a guess that these are LIDAR files and that what's needed might be
library(rLiDAR)
# Importing LAS file:
LASfile <- system.file("extdata", "LASexample1.las", package="rLiDAR")
# Reading LAS file
LAS<-readLAS(LASfile,short=TRUE)
head(LAS)
#> X Y Z Intensity ReturnNumber
#> [1,] 525924.4 3377909 0.05 144 1
#> [2,] 525924.0 3377910 0.00 120 1
#> [3,] 525923.6 3377910 0.07 121 1
#> [4,] 525923.2 3377911 0.01 147 1
#> [5,] 525922.8 3377911 0.03 136 1
#> [6,] 525922.4 3377912 0.00 137 1
Created on 2020-04-08 by the reprex package (v0.3.0)