diff --git a/plot.sh b/plot.sh
index 603a2dc..948cf23 100644
--- a/plot.sh
+++ b/plot.sh
@@ -1,11 +1,11 @@
-tail -50 wer.txt" > wer.txt
-tail -50 srr.txt" > srr.txt
+tail -50 wer.txt > wer.txt
+tail -50 srr.txt > srr.txt
     
 for file in wer srr
 do
 	gnuplot <<- EOF  
         set term png
-        set output "$file.png"
-        plot "$file.txt" with lines notitle
+        set output "${file}.png"
+        plot "${file}.txt" with lines notitle
 EOF
 done
\ No newline at end of file