Add SigAnaRecord in to workflow_by_code.py (microsoft#707)

* Update workflow_by_code.py

* Update workflow_by_code.py

examples/workflow_by_code.py

@@ -5,7 +5,7 @@
 from qlib.config import REG_CN
 from qlib.utils import init_instance_by_config, flatten_dict
 from qlib.workflow import R
-from qlib.workflow.record_temp import SignalRecord, PortAnaRecord
+from qlib.workflow.record_temp import SignalRecord, PortAnaRecord, SigAnaRecord
 from qlib.tests.data import GetData
 from qlib.tests.config import CSI300_BENCH, CSI300_GBDT_TASK
 
@@ -70,6 +70,10 @@
         sr = SignalRecord(model, dataset, recorder)
         sr.generate()
 
+        # Signal Analysis
+        sar = SigAnaRecord(recorder)
+        sar.generate()
+
         # backtest. If users want to use backtest based on their own prediction,
         # please refer to https://qlib.readthedocs.io/en/latest/component/recorder.html#record-template.
         par = PortAnaRecord(recorder, port_analysis_config, "day")