Error(s) in re-building vignettes:
--- re-building ‘economiccomplexity.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.
   [[ suppressing 785 column names '0011', '0012', '0013' ... ]]
   [[ suppressing 785 column names '0011', '0012', '0013' ... ]]

Attaching package: 'igraph'

The following objects are masked from 'package:stats':

    decompose, spectrum

The following object is masked from 'package:base':

    union

computing product projection...
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0 threshold...
0.05 threshold...
0.1 threshold...
0.15 threshold...
0.2 threshold...
0.25 threshold...
0.3 threshold...
0.35 threshold...
0.4 threshold...
0.45 threshold achieves the avg number of connections
computing product projection...
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0 threshold...
0.05 threshold...
0.1 threshold...
0.15 threshold...
0.2 threshold...
0.25 threshold...
0.3 threshold...
0.35 threshold...
0.4 threshold...
0.45 threshold...
0.5 threshold...
0.55 threshold achieves the avg number of connections
Loading required package: ggplot2
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
  no font could be found for family "Arial"
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
  no font could be found for family "Arial"
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
  no font could be found for family "Arial"
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
  no font could be found for family "Arial"
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
  no font could be found for family "Arial"
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
  no font could be found for family "Arial"
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
  no font could be found for family "Arial"
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
  no font could be found for family "Arial"
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
  no font could be found for family "Arial"
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
  no font could be found for family "Arial"
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
  no font could be found for family "Arial"
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
  no font could be found for family "Arial"
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
  no font could be found for family "Arial"
Warning in grid.Call(C_stringMetric, as.graphicsAnnot(x$label)) :
  no font could be found for family "Arial"
Warning in grid.Call(C_textBounds, as.graphicsAnnot(x$label), x$x, x$y,  :
  no font could be found for family "Arial"
Quitting from lines 122-144 (economiccomplexity.Rmd) 
Error: processing vignette 'economiccomplexity.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘economiccomplexity.Rmd’

SUMMARY: processing the following file failed:
  ‘economiccomplexity.Rmd’

Error: Vignette re-building failed.
Execution halted