[SPARK-14339][DOC] Add python examples for DCT,MinMaxScaler,MaxAbsScaler

## What changes were proposed in this pull request?
add three python examples

## How was this patch tested?
manual tests

Author: Zheng RuiFeng <ruifengz@foxmail.com>

Closes #12063 from zhengruifeng/dct_pe.

1 files changed, 24 insertions, 0 deletions

diff --git a/docs/ml-features.md b/docs/ml-features.md
index 4fe8eefc26..5cc27d3565 100644
--- a/docs/ml-features.md
+++ b/docs/ml-features.md
@@ -413,6 +413,14 @@ for more details on the API.
 
 {% include_example java/org/apache/spark/examples/ml/JavaDCTExample.java %}
 </div>
+
+<div data-lang="python" markdown="1">
+
+Refer to the [DCT Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.DCT)
+for more details on the API.
+
+{% include_example python/ml/dct_example.py %}
+</div>
 </div>
 
 ## StringIndexer
@@ -771,6 +779,14 @@ for more details on the API.
 
 {% include_example java/org/apache/spark/examples/ml/JavaMinMaxScalerExample.java %}
 </div>
+
+<div data-lang="python" markdown="1">
+
+Refer to the [MinMaxScaler Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.MinMaxScaler)
+for more details on the API.
+
+{% include_example python/ml/min_max_scaler_example.py %}
+</div>
 </div>
 
 
@@ -803,6 +819,14 @@ for more details on the API.
 
 {% include_example java/org/apache/spark/examples/ml/JavaMaxAbsScalerExample.java %}
 </div>
+
+<div data-lang="python" markdown="1">
+
+Refer to the [MaxAbsScaler Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.MaxAbsScaler)
+for more details on the API.
+
+{% include_example python/ml/max_abs_scaler_example.py %}
+</div>
 </div>
 
 ## Bucketizer