Addition of stats library to packaged release (#95)

* Addition of stats folder for .tgz releases

* length update for FRESH functionality

Author: cmccarthy1

.travis.yml

@@ -37,7 +37,7 @@ beforescript:
 script:
 - (cd clust && make && make install && make clean)
 - echo "Preparing version $TRAVIS_BRANCH-$TRAVIS_COMMIT"
-- tar czf ml_$TRAVIS_OS_NAME-$TRAVIS_BRANCH.tgz *.q fresh/ xval/ util/ clust/ graph/ timeseries/ optimize/ requirements.txt  LICENSE README.md
+- tar czf ml_$TRAVIS_OS_NAME-$TRAVIS_BRANCH.tgz *.q fresh/ xval/ util/ clust/ graph/ timeseries/ optimize/ stats/ requirements.txt  LICENSE README.md
 - echo "Packaged as ml_$TRAVIS_OS_NAME-$TRAVIS_BRANCH.zip"
 -  if [[ "x$QLIC_KC" != "x" ]]; then
     curl -fsSL -o test.q https://github.com/KxSystems/embedpy/raw/master/test.q;

fresh/feat.q

@@ -33,9 +33,10 @@ fresh.feat.absSumChange:{[data]
 //   and standard deviation) of an auto-correlation
 fresh.feat.aggAutoCorr:{[data]
   n:count data;
+  statsACF:$[.ml.stats_break;`adjusted;`unbiased];
   autoCorrFunc:$[(abs[var data]<1e-10)|1=n;
     0;
-    1_fresh.i.acf[data;$[.ml.stats_break;`adjusted;`unbiased] pykw 1b;`fft pykw n>1250]`
+    1_fresh.i.acf[data;statsACF pykw 1b;`fft pykw n>1250]`
     ];
   `mean`variance`median`dev!(avg;var;med;dev)@\:autoCorrFunc
   }