replaced offset string utilization by real Offsets to circumvent...

replaced offset string utilization by real Offsets to circumvent freqstring-offsetstring uncoherence

saqc/funcs/harm_functions.py

@@ -522,7 +522,7 @@ def _reshapeFlags(
     ]
     shifts = ["fshift", "bshift", "nshift"]
 
-    freq = ref_index.freqstr
+    freq = ref_index.freq
 
     if method in shifts:
         # forward/backward projection of every intervals last/first flag - rest will be dropped

test/funcs/test_harm_funcs.py

@@ -342,3 +342,13 @@ def test_wrapper(data, flagger):
     shift2Grid(data, field, flagger, freq, method='nshift', drop_flags=None)
     interpolate2Grid(data, field, flagger, freq, method="spline")
 
+if __name__ == "__main__":
+    dat = pd.read_csv('/home/luenensc/PyPojects/testSpace/current_single_raw.csv')
+    dat.set_index('TIMESTAMP_MEASUREMENT', inplace=True)
+    dat.set_index(pd.DatetimeIndex(dat.index), inplace=True)
+    field = dat.columns[0]
+    flagger = TESTFLAGGER[0]
+    freq = '1min'
+    flagger = flagger.initFlags(dat)
+    data, flagger = aggregate2Grid(dat, field, flagger, freq, value_func="sum",
+                   flag_func="max")
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