Switch from explicit variables to number of variables

test_set/feynman/skeleton_pool/expression_space.yaml

@@ -281,7 +281,4 @@ operators:
     symmetry: 0
     positive: false
     monotonicity: 1
-variables:
-- x1
-- x2
-- x3
+variables: 3

test_set/feynman/skeleton_pool/skeleton_pool.yaml

@@ -2,6 +2,7 @@ expression_space: ./expression_space.yaml
 holdout_pools: []
 sample_strategy:
   max_tries: 100
+  independent_dimensions: true
 allow_nan: false
 simplify: true
 literal_prior: uniform

test_set/hard_set/skeleton_pool/expression_space.yaml

@@ -281,7 +281,4 @@ operators:
     symmetry: 0
     positive: false
     monotonicity: 1
-variables:
-- x1
-- x2
-- x3
+variables: 3

test_set/nguyen/skeleton_pool/expression_space.yaml

@@ -281,7 +281,4 @@ operators:
     symmetry: 0
     positive: false
     monotonicity: 1
-variables:
-- x1
-- x2
-- x3
+variables: 3

test_set/nguyen/skeleton_pool/skeleton_pool.yaml

@@ -2,6 +2,7 @@ expression_space: ./expression_space.yaml
 holdout_pools: []
 sample_strategy:
   max_tries: 100
+  independent_dimensions: true
 allow_nan: false
 simplify: true
 literal_prior: uniform

test_set/soose_nc/skeleton_pool/expression_space.yaml

@@ -281,7 +281,4 @@ operators:
     symmetry: 0
     positive: false
     monotonicity: 1
-variables:
-- x1
-- x2
-- x3
+variables: 3

test_set/soose_nc/skeleton_pool/skeleton_pool.yaml

@@ -2,6 +2,7 @@ expression_space: ./expression_space.yaml
 holdout_pools: []
 sample_strategy:
   max_tries: 100
+  independent_dimensions: true
 allow_nan: false
 simplify: true
 literal_prior: uniform