Fix divide by zero in sinefit

Makefile

@@ -1,14 +1,14 @@
 #URL="http://bucket.mit.edu:8080/nilmdb"
 URL="http://localhost/nilmdb"
 
-all:
-ifeq ($(INSIDE_EMACS), t)
-	@make test
-else
-	@echo "Try 'make install'"
-endif
+all: test
 
-test: test_trainola3
+test:
+ifeq ($(INSIDE_EMACS), t)
+	@make test_sinefit
+else
+	@echo 'No test suite for nilmtools.  Try "make install"'
+endif
 
 test_pipewatch:
 	nilmtools/pipewatch.py -t 3 "seq 10 20" "seq 20 30"
@@ -58,6 +58,14 @@ test_prep: /tmp/raw.dat
 	nilmtools/prep.py -c 2 /test/raw /test/sinefit /test/prep
 	nilmtool extract -s min -e max /test/prep | head -20
 
+test_sinefit:
+	make install >/dev/null 2>&1
+	-nilmtool destroy -R /test/sinefit
+	nilmtool create /test/sinefit float32_3
+	nilmtools/sinefit.py -c 5 -s '2013/03/25 09:11:00' \
+	-e '2013/03/25 10:11:00' /sharon/raw /test/sinefit
+	nilmtool extract -s min -e max /test/sinefit | head -20
+
 test_decimate:
 	-@nilmtool destroy /lees-compressor/no-leak/raw/4 || true
 	-@nilmtool destroy /lees-compressor/no-leak/raw/16 || true

extras/sample-cron-scripts/cleanup.cfg

@@ -6,3 +6,4 @@ keep = 2w
 
 [/sharon/sinefit]
 keep = 1y
+decimated = false

extras/sample-cron-scripts/crontab

@@ -1,9 +1,15 @@
 # Install this by running "crontab crontab" (will replace existing crontab)
 
+SHELL=/bin/bash
+PATH=/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin
+
 # m h dom mon dow cmd
 
 # Run NilmDB processing every 5 minutes
 */5 * * * * chronic /home/nilm/data/process.sh
 
-# Check the capture process every minute
-*/1 * * * * chronic /home/nilm/data/capture.sh
+# Try frequently restarting the capture process in case it died
+*/5 * * * * chronic /home/nilm/data/capture.sh
+
+# Run fsck at startup
+@reboot chronic nilmdb-fsck --fix --no-data /home/nilm/data/db/

extras/sample-cron-scripts/process.sh

@@ -13,16 +13,20 @@ if ! flock -n -x 99 ; then
 fi
 trap 'rm -f "$LOCKFILE"' 0
 
-# sinefit on phase A voltage
+# redirect stdout/stderr to log, but keep it on the console too
+exec >  >(tee /home/nilm/data/process.log)
+exec 2> >(tee -a /home/nilm/data/process.log >&2)
+
+echo "sinefit on phase A voltage"
 nilm-sinefit -c 5 /sharon/raw /sharon/sinefit
 
-# prep on A, B, C with appropriate rotations
+echo "prep on A, B, C with appropriate rotations"
 nilm-prep -c 1 -r 0 /sharon/raw /sharon/sinefit /sharon/prep-a
 nilm-prep -c 2 -r 120 /sharon/raw /sharon/sinefit /sharon/prep-b
 nilm-prep -c 3 -r 240 /sharon/raw /sharon/sinefit /sharon/prep-c
 
-# decimate raw and prep data
+echo "decimate raw and prep data"
 nilm-decimate-auto /sharon/raw /sharon/prep*
 
-# run cleanup
+echo "run cleanup"
 nilm-cleanup --yes /home/nilm/data/cleanup.cfg

nilmtools/copy_one.py

@@ -12,6 +12,8 @@ import sys
 def main(argv = None):
     f = nilmtools.filter.Filter()
     parser = f.setup_parser("Copy a stream")
+    parser.add_argument('-n', '--nometa', action='store_true',
+                        help="Don't copy or check metadata")
 
     # Parse arguments
     try:
@@ -25,8 +27,9 @@ def main(argv = None):
         raise SystemExit(1)
 
     # Copy metadata
-    meta = f.client_src.stream_get_metadata(f.src.path)
-    f.check_dest_metadata(meta)
+    if not args.nometa:
+        meta = f.client_src.stream_get_metadata(f.src.path)
+        f.check_dest_metadata(meta)
 
     # Copy all rows of data using the faster Numpy interfaces
     extractor = NumpyClient(f.src.url).stream_extract_numpy

nilmtools/copy_wildcard.py

@@ -16,6 +16,8 @@ def main(argv = None):
 
     Example: %(prog)s -u http://host1/nilmdb -U http://host2/nilmdb /sharon/*
     """, skip_paths = True)
+    parser.add_argument('-n', '--nometa', action='store_true',
+                        help="Don't copy or check metadata")
     parser.add_argument("path", action="store", nargs="+",
                         help='Wildcard paths to copy')
     args = parser.parse_args(argv)
@@ -56,6 +58,8 @@ def main(argv = None):
             new_argv.extend(["--end", "@" + repr(args.end)])
         if args.dry_run:
             new_argv.extend(["--dry-run"])
+        if args.nometa:
+            new_argv.extend(["--nometa"])
         if args.force_metadata:
             new_argv.extend(["--force-metadata"])
         new_argv.extend([stream[0], stream[0]])

nilmtools/decimate_auto.py

@@ -21,9 +21,9 @@ def main(argv = None):
     parser.add_argument("-u", "--url", action="store",
                         default="http://localhost/nilmdb/",
                         help="NilmDB server URL (default: %(default)s)")
-    parser.add_argument('-f', '--factor', action='store', default=4, type=int,
+    parser.add_argument("-f", "--factor", action="store", default=4, type=int,
                         help='Decimation factor (default: %(default)s)')
-    parser.add_argument("--force-metadata", action="store_true",
+    parser.add_argument("-F", "--force-metadata", action="store_true",
                         default = False,
                         help="Force metadata changes if the dest "
                         "doesn't match")

nilmtools/filter.py

@@ -133,6 +133,34 @@ def process_numpy_interval(interval, extractor, inserter, warn_rows,
                 # we'll not miss any data when we run again later.
                 insert_ctx.update_end(old_array[processed][0])
 
+def example_callback_function(data, interval, args, insert_func, final):
+    """Example of the signature for the function that gets passed
+    to process_numpy_interval.
+
+    'data': array of data to process -- may be empty
+
+    'interval': overall interval we're processing (but not necessarily
+    the interval of this particular chunk of data)
+
+    'args': opaque arguments passed to process_numpy
+
+    'insert_func': function to call in order to insert array of data.
+    Should be passed a 2-dimensional array of data to insert.
+    Data timestamps must be within the provided interval.
+
+    'final': True if this is the last bit of data for this
+    contiguous interval, False otherwise.
+
+    Return value of 'function' is the number of data rows processed.
+    Unprocessed data will be provided again in a subsequent call
+    (unless 'final' is True).
+
+    If unprocessed data remains after 'final' is True, the interval
+    being inserted will be ended at the timestamp of the first
+    unprocessed data point.
+    """
+    raise NotImplementedError("example_callback_function does nothing")
+
 class Filter(object):
 
     def __init__(self, parser_description = None):
@@ -144,8 +172,8 @@ class Filter(object):
         self.dest = None
         self.start = None
         self.end = None
-        self.interhost = False
-        self.force_metadata = False
+        self._interhost = False
+        self._force_metadata = False
         if parser_description is not None:
             self.setup_parser(parser_description)
             self.parse_args()
@@ -178,7 +206,7 @@ class Filter(object):
                            default = False,
                            help="Just print intervals that would be "
                            "processed")
-        group.add_argument("--force-metadata", action="store_true",
+        group.add_argument("-F", "--force-metadata", action="store_true",
                            default = False,
                            help="Force metadata changes if the dest "
                            "doesn't match")
@@ -208,12 +236,12 @@ class Filter(object):
         if dest_url is None:
             dest_url = url
         if url != dest_url:
-            self.interhost = True
+            self._interhost = True
 
         self._client_src = Client(url)
         self._client_dest = Client(dest_url)
 
-        if (not self.interhost) and (srcpath == destpath):
+        if (not self._interhost) and (srcpath == destpath):
             raise ArgumentError("source and destination path must be different")
 
         # Open the streams
@@ -231,8 +259,8 @@ class Filter(object):
 
         # Print info
         if not quiet:
-            print "Source:", self.src.string(self.interhost)
-            print "  Dest:", self.dest.string(self.interhost)
+            print "Source:", self.src.string(self._interhost)
+            print "  Dest:", self.dest.string(self._interhost)
 
     def parse_args(self, argv = None):
         """Parse arguments from a command line"""
@@ -241,7 +269,7 @@ class Filter(object):
         self.set_args(args.url, args.dest_url, args.srcpath, args.destpath,
                       args.start, args.end, quiet = False, parsed_args = args)
 
-        self.force_metadata = args.force_metadata
+        self._force_metadata = args.force_metadata
         if args.dry_run:
             for interval in self.intervals():
                 print interval.human_string()
@@ -252,7 +280,7 @@ class Filter(object):
         """Generate all the intervals that this filter should process"""
         self._using_client = True
 
-        if self.interhost:
+        if self._interhost:
             # Do the difference ourselves
             s_intervals = ( Interval(start, end)
                             for (start, end) in
@@ -289,10 +317,11 @@ class Filter(object):
                                                      str(e), toparse))
 
     def check_dest_metadata(self, data):
-        """See if the metadata jives, and complain if it doesn't.  If
-        there's no conflict, update the metadata to match 'data'."""
+        """See if the metadata jives, and complain if it doesn't.  For
+        each key in data, if the stream contains the key, it must match
+        values.  If the stream does not contain the key, it is created."""
         metadata = self._client_dest.stream_get_metadata(self.dest.path)
-        if not self.force_metadata:
+        if not self._force_metadata:
             for key in data:
                 wanted = data[key]
                 if not isinstance(wanted, basestring):
@@ -329,30 +358,10 @@ class Filter(object):
         If 'intervals' is not None, process those intervals instead of
         the default list.
 
-        'function' should be defined as:
-        # def function(data, interval, args, insert_func, final)
-
-        'data': array of data to process -- may be empty
-
-        'interval': overall interval we're processing (but not necessarily
-        the interval of this particular chunk of data)
-
-        'args': opaque arguments passed to process_numpy
-
-        'insert_func': function to call in order to insert array of data.
-        Should be passed a 2-dimensional array of data to insert.
-        Data timestamps must be within the provided interval.
-
-        'final': True if this is the last bit of data for this
-        contiguous interval, False otherwise.
-
-        Return value of 'function' is the number of data rows processed.
-        Unprocessed data will be provided again in a subsequent call
-        (unless 'final' is True).
-
-        If unprocessed data remains after 'final' is True, the interval
-        being inserted will be ended at the timestamp of the first
-        unprocessed data point.
+        'function' should be defined with the same interface as
+        nilmtools.filter.example_callback_function.  See the
+        documentation of that for details.  'args' are passed to
+        'function'.
         """
         extractor = NumpyClient(self.src.url).stream_extract_numpy
         inserter = NumpyClient(self.dest.url).stream_insert_numpy_context

nilmtools/insert.py

@@ -53,7 +53,7 @@ def parse_args(argv = None):
       is stepped forward to match 'clock'.
 
     - If 'data' is running ahead, there is overlap in the data, and an
-      error is raised.  If '--ignore' is specified, the current file
+      error is raised.  If '--skip' is specified, the current file
       is skipped instead of raising an error.
     """))
     parser.add_argument("-u", "--url", action="store",

nilmtools/math.py

@@ -37,17 +37,21 @@ def sfit4(data, fs):
     i = argmax(F[0:int(N/2)] + F[1:int(N/2+1)])
 
     # Interpolate FFT to get a better result (from Markus [B37])
-    U1 = real(Fc[i])
-    U2 = real(Fc[i+1])
-    V1 = imag(Fc[i])
-    V2 = imag(Fc[i+1])
-    n = 2 * pi / N
-    ni1 = n * i
-    ni2 = n * (i+1)
-    K = ((V2-V1)*sin(ni1) + (U2-U1)*cos(ni1)) / (U2-U1)
-    Z1 = V1 * (K - cos(ni1)) / sin(ni1) + U1
-    Z2 = V2 * (K - cos(ni2)) / sin(ni2) + U2
-    i = arccos((Z2*cos(ni2) - Z1*cos(ni1)) / (Z2-Z1)) / n
+    try:
+        U1 = real(Fc[i])
+        U2 = real(Fc[i+1])
+        V1 = imag(Fc[i])
+        V2 = imag(Fc[i+1])
+        n = 2 * pi / N
+        ni1 = n * i
+        ni2 = n * (i+1)
+        K = ((V2-V1)*sin(ni1) + (U2-U1)*cos(ni1)) / (U2-U1)
+        Z1 = V1 * (K - cos(ni1)) / sin(ni1) + U1
+        Z2 = V2 * (K - cos(ni2)) / sin(ni2) + U2
+        i = arccos((Z2*cos(ni2) - Z1*cos(ni1)) / (Z2-Z1)) / n
+    except Exception:
+        # Just go with the biggest FFT peak
+        i = argmax(F[0:int(N/2)])
 
     # Convert to Hz
     f0 = i * float(fs) / N

nilmtools/pipewatch.py

@@ -84,13 +84,16 @@ def pipewatch(args):
                                      bufsize = -1, close_fds = True,
                                      stdin = devnull,
                                      stdout = subprocess.PIPE,
-                                     stderr = None)
+                                     stderr = None,
+                                     preexec_fn = os.setpgrp)
         consumer = subprocess.Popen(args.consumer, shell = True,
                                     bufsize = -11, close_fds = True,
                                     stdin = subprocess.PIPE,
-                                    stdout = None, stderr = None)
+                                    stdout = None,
+                                    stderr = None,
+                                    preexec_fn = os.setpgrp)
 
-        queue = Queue.Queue(maxsize = 32)
+        queue = Queue.Queue(maxsize = 4)
         reader = threading.Thread(target = reader_thread,
                                   args = (queue, generator.stdout.fileno()))
         reader.start()
@@ -125,16 +128,21 @@ def pipewatch(args):
                 return proc.poll()
             try:
                 if poll_timeout(proc, 0.5) is None:
-                    proc.terminate()
+                    os.killpg(proc.pid, signal.SIGTERM)
                     if poll_timeout(proc, 0.5) is None:
-                        proc.kill()
+                        os.killpg(proc.pid, signal.SIGKILL)
             except OSError:
                 pass
             return poll_timeout(proc, 0.5)
 
         # Wait for them to die, or kill them
-        gret = kill(generator)
         cret = kill(consumer)
+        gret = kill(generator)
+
+        # Consume all remaining data in the queue until the reader
+        # and watcher threads are done
+        while reader.is_alive() or watcher.is_alive():
+            queue.get(True, 0.1)
 
         fprintf(sys.stderr, "pipewatch: generator returned %d, " +
                 "consumer returned %d\n", gret, cret)

nilmtools/prep.py

@@ -81,7 +81,8 @@ def main(argv = None):
     f.check_dest_metadata({ "prep_raw_source": f.src.path,
                             "prep_sinefit_source": sinefit.path,
                             "prep_column": args.column,
-                            "prep_rotation": repr(rotation) })
+                            "prep_rotation": repr(rotation),
+                            "prep_nshift": args.nshift })
 
     # Find the intersection of the usual set of intervals we'd filter,
     # and the intervals actually present in sinefit data.  This is

nilmtools/sinefit.py

@@ -96,8 +96,11 @@ def process(data, interval, args, insert_function, final):
     rows = data.shape[0]
 
     # Estimate sampling frequency from timestamps
-    fs = (rows-1) / (timestamp_to_seconds(data[-1][0]) -
-                     timestamp_to_seconds(data[0][0]))
+    ts_min = timestamp_to_seconds(data[0][0])
+    ts_max = timestamp_to_seconds(data[-1][0])
+    if ts_min >= ts_max:
+        return 0
+    fs = (rows-1) / (ts_max - ts_min)
 
     # Pull out about 3.5 periods of data at once;
     # we'll expect to match 3 zero crossings in each window

nilmtools/trainola.py

@@ -287,8 +287,21 @@ def main(argv = None):
 
     if argv is None:
         argv = sys.argv[1:]
-    if len(argv) != 1:
-        raise DataError("need one argument, either a dictionary or JSON string")
+    if len(argv) != 1 or argv[0] == '-h' or argv[0] == '--help':
+        printf("usage: %s [-h] [-v] <json-config-dictionary>\n\n", sys.argv[0])
+        printf("  Where <json-config-dictionary> is a JSON-encoded " +
+               "dictionary string\n")
+        printf("  with exemplar and stream data.\n\n")
+        printf("  See extras/trainola-test-param*.js in the nilmtools " +
+               "repository\n")
+        printf("  for examples.\n")
+        if len(argv) != 1:
+            raise SystemExit(1)
+        raise SystemExit(0)
+
+    if argv[0] == '-v' or argv[0] == '--version':
+        printf("%s\n", nilmtools.__version__)
+        raise SystemExit(0)
 
     try:
         # Passed in a JSON string (e.g. on the command line)