diff --git a/docs/README.methods.md b/docs/README.methods.md
index 7b9caa2..0c2c977 100644
--- a/docs/README.methods.md
+++ b/docs/README.methods.md
@@ -69,7 +69,7 @@ from fsspark.fs.core import FSDataFrame
 from fsspark.fs.ml import cv_rf_classification, get_accuracy, get_predictions
 from fsspark.fs.multivariate import multivariate_filter
 from fsspark.fs.univariate import univariate_filter
-from fsspark.fs.utils import (filter_missingness_rate,
+from fsspark.fs.utils import (remove_features_by_missingness_rate,
                               impute_missing)
 from fsspark.utils.datasets import get_tnbc_data_path
 from fsspark.utils.io import import_table_as_psdf
@@ -86,8 +86,7 @@ fsdf = FSDataFrame(fsdf, sample_col='Sample', label_col='label')
 # Step 1. Data pre-processing.
 
 # a) Filter missingness rate
-fsdf = filter_missingness_rate(fsdf,
-                               threshold=0.1)
+fsdf = remove_features_by_missingness_rate(fsdf, threshold=0.1)
 
 # b) Impute data frame
 fsdf = impute_missing(fsdf)
diff --git a/images/FSDF_structure.png b/images/FSDF_structure.png
index 19d7ed2..715a448 100644
Binary files a/images/FSDF_structure.png and b/images/FSDF_structure.png differ