diff --git a/demo/mushroom/README b/demo/binary_classification/README
similarity index 100%
rename from demo/mushroom/README
rename to demo/binary_classification/README
diff --git a/demo/mushroom/agaricus-lepiota.data b/demo/binary_classification/agaricus-lepiota.data
similarity index 100%
rename from demo/mushroom/agaricus-lepiota.data
rename to demo/binary_classification/agaricus-lepiota.data
diff --git a/demo/mushroom/agaricus-lepiota.fmap b/demo/binary_classification/agaricus-lepiota.fmap
similarity index 100%
rename from demo/mushroom/agaricus-lepiota.fmap
rename to demo/binary_classification/agaricus-lepiota.fmap
diff --git a/demo/mushroom/agaricus-lepiota.names b/demo/binary_classification/agaricus-lepiota.names
similarity index 100%
rename from demo/mushroom/agaricus-lepiota.names
rename to demo/binary_classification/agaricus-lepiota.names
diff --git a/demo/mushroom/dump2json.py b/demo/binary_classification/dump2json.py
similarity index 100%
rename from demo/mushroom/dump2json.py
rename to demo/binary_classification/dump2json.py
diff --git a/demo/mushroom/mapfeat.py b/demo/binary_classification/mapfeat.py
similarity index 100%
rename from demo/mushroom/mapfeat.py
rename to demo/binary_classification/mapfeat.py
diff --git a/demo/mushroom/mknfold.py b/demo/binary_classification/mknfold.py
similarity index 100%
rename from demo/mushroom/mknfold.py
rename to demo/binary_classification/mknfold.py
diff --git a/demo/mushroom/mushroom.conf b/demo/binary_classification/mushroom.conf
similarity index 100%
rename from demo/mushroom/mushroom.conf
rename to demo/binary_classification/mushroom.conf
diff --git a/demo/mushroom/runexp.sh b/demo/binary_classification/runexp.sh
similarity index 100%
rename from demo/mushroom/runexp.sh
rename to demo/binary_classification/runexp.sh
diff --git a/demo/regression/reg.conf b/demo/regression/reg.conf
deleted file mode 100644
index 627a1de05..000000000
--- a/demo/regression/reg.conf
+++ /dev/null
@@ -1,22 +0,0 @@
-num_round=10
-
-save_period=0
-
-data = "train.txt"
-test:data = "test.txt"
-eval[valid] = "validation.txt"
-
-booster_type=1
-
-bst:num_feature=3
-
-bst:learning_rate=0.01
-                
-bst:min_child_weight=1
-                
-bst:min_split_loss=0.1
-                
-bst:max_depth=3           
-                
-bst:reg_lambda=0.1
-
diff --git a/demo/regression/validation.txt b/demo/regression/validation.txt
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index 74dd9b66a..000000000
--- a/demo/regression/validation.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-1 0:1 1:2 2:1
-1 0:2 1:1 2:1
-0 0:5 1:0 2:0
-