diff --git a/files/data_REGRESS.csv b/files/data_REGRESS.csv
new file mode 100644
index 0000000..e72e0a8
--- /dev/null
+++ b/files/data_REGRESS.csv
@@ -0,0 +1,10 @@
+t,r,s
+0.241,0.39,0.98
+.615,0.72,1.01
+1.00,1.00,1.00
+1.88,1.52,1.01
+11.8,5.20,0.99
+29.5,9.54,1.00
+84.0,19.18,1.00
+165,30.06,1.00
+248,39.44,1.00
diff --git a/files/functions_REGRESS.csv b/files/functions_REGRESS.csv
new file mode 100644
index 0000000..33f6af0
--- /dev/null
+++ b/files/functions_REGRESS.csv
@@ -0,0 +1,5 @@
+operator, arity
++,2
+-,2
+*,2
+/,2