README.md in ngt-0.2.2 vs README.md in ngt-0.2.3

@@ -27,11 +27,11 @@
 ```
 
 Create an index
 
 ```ruby
-index = Ngt::Index.create(path, dimensions)
+index = Ngt::Index.new(dimensions)
 ```
 
 Insert objects
 
 ```ruby
@@ -45,17 +45,17 @@
 ```
 
 Save the index
 
 ```ruby
-index.save
+index.save(path)
 ```
 
 Load an index
 
 ```ruby
-index = Ngt::Index.new(path)
+index = Ngt::Index.load(path)
 ```
 
 Get an object by id
 
 ```ruby
@@ -94,12 +94,11 @@
 objects = []
 100.times do |i|
   objects << dim.times.map { rand(100) }
 end
 
-index = Ngt::Index.create("tmp", dim)
+index = Ngt::Index.new(dim)
 index.batch_insert(objects)
-index.save
 
 query = objects[0]
 result = index.search(query, size: 3)
 
 result.each do |res|