library(sf)
## Linking to GEOS 3.5.1, GDAL 2.1.2, proj.4 4.9.3, lwgeom 2.3.1 r15264
library(rgdal)
## Loading required package: sp
## rgdal: version: 1.2-8, (SVN revision 663)
##  Geospatial Data Abstraction Library extensions to R successfully loaded
##  Loaded GDAL runtime: GDAL 2.1.2, released 2016/10/24
##  Path to GDAL shared files: /usr/share/gdal/2.1
##  Loaded PROJ.4 runtime: Rel. 4.9.3, 15 August 2016, [PJ_VERSION: 493]
##  Path to PROJ.4 shared files: (autodetected)
##  Linking to sp version: 1.2-5
library(mapview)
## Loading required package: leaflet
pnts<-read.csv("/home/chris/Behav_clean_reproj.csv")
pnts<-pnts[!is.na(pnts$x_UTM),]

coordinates(pnts) = ~x_UTM+y_UTM  # Set coordinates
pnts<-st_as_sf(pnts)  # Make sf object
st_crs(pnts) <- 32647## Set CRS
pnts_4326<-st_transform(pnts,4326)
mapview(pnts_4326)