Error(s) in re-building vignettes:
  ...
--- re-building ‘Landsat8.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Loading required package: raster
Loading required package: sp
Loading required package: rgdal
rgdal: version: 1.5-15, (SVN revision 1045)
Geospatial Data Abstraction Library extensions to R successfully loaded
Loaded GDAL runtime: GDAL 2.2.4, released 2018/03/19
Path to GDAL shared files: /usr/local/share/gdal
GDAL binary built with GEOS: TRUE 
Loaded PROJ runtime: Rel. 5.2.0, September 15th, 2018, [PJ_VERSION: 520]
Path to PROJ shared files: (autodetected)
Linking to sp version:1.4-2
Warning in `[<-`(`*tmp*`, i, value = raster(list.files(path = path, pattern = paste0(image_pattern,  :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = raster(list.files(path = path, pattern = paste0(image_pattern,  :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = raster(list.files(path = path, pattern = paste0(image_pattern,  :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = raster(list.files(path = path, pattern = paste0(image_pattern,  :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = raster(list.files(path = path, pattern = paste0(image_pattern,  :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = raster(list.files(path = path, pattern = paste0(image_pattern,  :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = raster(list.files(path = path, pattern = paste0(image_pattern,  :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = raster(list.files(path = path, pattern = paste0(image_pattern,  :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = raster(files[i])) :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = raster(files[i])) :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = raster(files[i])) :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = raster(files[i])) :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = raster(files[i])) :
  implicit list embedding of S4 objects is deprecated
Warning in `[<-`(`*tmp*`, i, value = raster(files[i])) :
  implicit list embedding of S4 objects is deprecated
Warning in read.WSdata(WSdata = csvfile, datetime.format = "%Y/%m/%d %H:%M",  :
  As tz = "", assuming the weather station time zone is GB
Warning in check_tzones(e1, e2) : 'tzone' attributes are inconsistent
Warning in check_tzones(e1, e2) : 'tzone' attributes are inconsistent
Warning in wkt(obj) : CRS object has no comment
Warning in calcAnchors(image = image.TOAr, Ts = Ts, LAI = LAI, plots = T,  :
  anchor method names has changed. Old names (CITRA-MCBx) are 
            deprecated. Options now include 'best', 'random' and 'flexible'
--- finished re-building ‘Landsat8.Rmd’

--- re-building ‘METRIC_advanced.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Loading required package: raster
Loading required package: sp
Loading required package: rgdal
rgdal: version: 1.5-15, (SVN revision 1045)
Geospatial Data Abstraction Library extensions to R successfully loaded
Loaded GDAL runtime: GDAL 2.2.4, released 2018/03/19
Path to GDAL shared files: /usr/local/share/gdal
GDAL binary built with GEOS: TRUE 
Loaded PROJ runtime: Rel. 5.2.0, September 15th, 2018, [PJ_VERSION: 520]
Path to PROJ shared files: (autodetected)
Linking to sp version:1.4-2
Quitting from lines 93-94 (METRIC_advanced.Rmd) 
Error: processing vignette 'METRIC_advanced.Rmd' failed with diagnostics:
error in evaluating the argument 'x' in selecting a method for function 'extent': is.character(proj) is not TRUE
--- failed re-building ‘METRIC_advanced.Rmd’

--- re-building ‘METRIC_simple.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Loading required package: raster
Loading required package: sp
Loading required package: rgdal
rgdal: version: 1.5-15, (SVN revision 1045)
Geospatial Data Abstraction Library extensions to R successfully loaded
Loaded GDAL runtime: GDAL 2.2.4, released 2018/03/19
Path to GDAL shared files: /usr/local/share/gdal
GDAL binary built with GEOS: TRUE 
Loaded PROJ runtime: Rel. 5.2.0, September 15th, 2018, [PJ_VERSION: 520]
Path to PROJ shared files: (autodetected)
Linking to sp version:1.4-2
Warning in wkt(obj) : CRS object has no comment
Warning in wkt(CRS(tg)) : CRS object has no comment
Quitting from lines 104-108 (METRIC_simple.Rmd) 
Error: processing vignette 'METRIC_simple.Rmd' failed with diagnostics:
error in evaluating the argument 'obj' in selecting a method for function 'coordinates': is.character(proj) is not TRUE
--- failed re-building ‘METRIC_simple.Rmd’

SUMMARY: processing the following files failed:
  ‘METRIC_advanced.Rmd’ ‘METRIC_simple.Rmd’

Error: Vignette re-building failed.
Execution halted