diff --git a/tex/gfx/perf.eps b/tex/gfx/perf.eps
index 81a28f3..b65465d 100644
--- a/tex/gfx/perf.eps
+++ b/tex/gfx/perf.eps
@@ -1,7 +1,7 @@
 %!PS-Adobe-2.0 EPSF-2.0
 %%Title: perf.tex
 %%Creator: gnuplot 5.2 patchlevel 2
-%%CreationDate: Mon Feb 26 10:56:19 2018
+%%CreationDate: Mon Feb 26 11:24:00 2018
 %%DocumentFonts: 
 %%BoundingBox: 50 50 302 230
 %%EndComments
@@ -441,7 +441,7 @@ SDict begin [
   /Creator (gnuplot 5.2 patchlevel 2)
 %  /Producer (gnuplot)
 %  /Keywords ()
-  /CreationDate (Mon Feb 26 10:56:19 2018)
+  /CreationDate (Mon Feb 26 11:24:00 2018)
   /DOCINFO pdfmark
 end
 } ifelse
@@ -1155,8 +1155,8 @@ LCb setrgbcolor
 78 0 V
 69 4 V
 82 -2 V
-72 314 V
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+72 152 V
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diff --git a/tex/gfx/perf/R.csv b/tex/gfx/perf/R.csv
index 060b52d..ca5069a 100644
--- a/tex/gfx/perf/R.csv
+++ b/tex/gfx/perf/R.csv
@@ -15,7 +15,7 @@
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