Error(s) in re-building vignettes:
  ...
--- re-building ‘FRK_intro.Rnw’ using knitr
** Processing: figure/unnamed-chunk-27-1.png
600x600 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 101098 bytes
Input file size = 102100 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 98796
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 97915
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 97915

Output IDAT size = 97915 bytes (3183 bytes decrease)
Output file size = 97993 bytes (4107 bytes = 4.02% decrease)

** Processing: figure/unnamed-chunk-27-2.png
600x600 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 60472 bytes
Input file size = 61414 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 56905
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 56590
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 56590

Output IDAT size = 56590 bytes (3882 bytes decrease)
Output file size = 56668 bytes (4746 bytes = 7.73% decrease)

** Processing: figure/unnamed-chunk-31-1.png
490x245 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 121106 bytes
Input file size = 121352 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 83406
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 83406

Output IDAT size = 83406 bytes (37700 bytes decrease)
Output file size = 83484 bytes (37868 bytes = 31.21% decrease)

** Processing: figure/unnamed-chunk-32-1.png
490x245 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 87588 bytes
Input file size = 87786 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 65940
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 65940

Output IDAT size = 65940 bytes (21648 bytes decrease)
Output file size = 66018 bytes (21768 bytes = 24.80% decrease)

** Processing: figure/unnamed-chunk-33-1.png
490x245 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 89322 bytes
Input file size = 89520 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 65554
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 65554

Output IDAT size = 65554 bytes (23768 bytes decrease)
Output file size = 65632 bytes (23888 bytes = 26.68% decrease)

** Processing: figure/unnamed-chunk-60-1.png
1120x210 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 187662 bytes
Input file size = 188004 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 136081
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 136081

Output IDAT size = 136081 bytes (51581 bytes decrease)
Output file size = 136159 bytes (51845 bytes = 27.58% decrease)

** Processing: figure/unnamed-chunk-61-1.png
1120x210 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 130966 bytes
Input file size = 131224 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 110474
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 110474

Output IDAT size = 110474 bytes (20492 bytes decrease)
Output file size = 110552 bytes (20672 bytes = 15.75% decrease)

** Processing: figure/unnamed-chunk-62-1.png
1120x210 pixels, 3x8 bits/pixel, RGB
Input IDAT size = 122766 bytes
Input file size = 123012 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 110723
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 110723

Output IDAT size = 110723 bytes (12043 bytes decrease)
Output file size = 110801 bytes (12211 bytes = 9.93% decrease)

Error: processing vignette 'FRK_intro.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'FRK_intro.tex' failed.
LaTeX errors:
! Undefined control sequence.
l.315 \hlkwd{library}\hldef
                           {(sp)}        \hlcom{# for defining points/polygons}

? 
! Emergency stop.
l.315 
      
End of file on the terminal!

!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘FRK_intro.Rnw’

--- re-building ‘FRK_non-Gaussian.Rnw’ using knitr
Error: processing vignette 'FRK_non-Gaussian.Rnw' failed with diagnostics:
Running 'texi2dvi' on 'FRK_non-Gaussian.tex' failed.
LaTeX errors:
! Undefined control sequence.
l.387 \hlkwd{library}\hldef
                           {(}\hlsng{"FRK"}\hldef{)}       \hlcom{# for carr...

? 
! Emergency stop.
l.387 
      
End of file on the terminal!

!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘FRK_non-Gaussian.Rnw’

SUMMARY: processing the following files failed:
  ‘FRK_intro.Rnw’ ‘FRK_non-Gaussian.Rnw’

Error: Vignette re-building failed.
Execution halted