KXI-3689 fix aggAutoCorr (#94)

* KXI-3689 fix aggAutoCorr

* KXI-3689 fix conda build

* KXI-3689 update pip

Author: andrewmorrison1

docker/Dockerfile

@@ -43,7 +43,8 @@ USER kx
 
 RUN . /opt/conda/etc/profile.d/conda.sh \
         && conda activate kx \
-        && pip install pip==9.0.1 \
+	&& conda install python=3.8 \
+        && pip install pip==21.0.1 \
         && pip install -r /opt/kx/ml/requirements.txt \
         && conda clean -y --all 
 

fresh/feat.q

@@ -35,7 +35,7 @@ fresh.feat.aggAutoCorr:{[data]
   n:count data;
   autoCorrFunc:$[(abs[var data]<1e-10)|1=n;
     0;
-    1_fresh.i.acf[data;`unbiased pykw 1b;`fft pykw n>1250]`
+    1_fresh.i.acf[data;$[.ml.stats_break;`adjusted;`unbiased] pykw 1b;`fft pykw n>1250]`
     ];
   `mean`variance`median`dev!(avg;var;med;dev)@\:autoCorrFunc
   }

fresh/utils.q

@@ -11,6 +11,8 @@ numpy    :.p.import`numpy
 pyStats  :.p.import`scipy.stats
 signal   :.p.import`scipy.signal
 stattools:.p.import`statsmodels.tsa.stattools
+stats_ver:"F"$"." vs (.p.import`statsmodels)[`:__version__]`
+stats_break:$[((stats_ver[0]=0)&stats_ver[1]>=12)|stats_ver[0]>0;1b;0b]
 
 // @private
 // @kind function