Error in re-building vignettes:
  ...
This is mgcv 1.8-23. For overview type 'help("mgcv-package")'.
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
a_0 not supplied. One iteration IWLS of static glm model is used
! Missing $ inserted.
<inserted text> 
                $
l.233 ...}argmaxu\}{[}1{]}\{\underset{#1}{\argmax}
                                                  :\} 
Here is how much of TeX's memory you used:
 13304 strings out of 493232
 194303 string characters out of 6147017
 300360 words of memory out of 5000000
 16954 multiletter control sequences out of 15000+600000
 41485 words of font info for 52 fonts, out of 8000000 for 9000
 805 hyphenation exceptions out of 8191
 32i,5n,38p,254b,270s stack positions out of 5000i,500n,10000p,200000b,80000s

Error: processing vignette 'ddhazard.Rmd' failed with diagnostics:
Failed to compile ddhazard.tex. See ddhazard.log for more info.
Execution halted