def error_calculation_test(self):
"""Test the calculation of the SymmetricMeanAbsolutePercentageError."""
dataPtsOrg = [
2.30, .373, .583, 1.88, 1.44, -0.0852, -.341, .619, .131, 1.27, 0
]
dataPtsCalc = [
-1.21, -.445, .466, .226, -.694, -.575, 2.73, -1.49, -1.45, -.193,
0
]
tsOrg = TimeSeries()
tsCalc = TimeSeries()
for idx in xrange(len(dataPtsOrg)):
tsOrg.add_entry(float(idx), dataPtsOrg[idx])
tsCalc.add_entry(float(idx), dataPtsCalc[idx])
smape = SymmetricMeanAbsolutePercentageError()
smape.initialize(tsOrg, tsCalc)
## compare the strings due to accuracy
assert "1.5706" == str(smape.get_error())[:6]
def local_error_test(self):
"""Test SymmetricMeanAbsolutePercentageError local error."""
dataPtsOrg = [
2.30, .373, .583, 1.88, 1.44, -0.0852, -.341, .619, .131, 1.27, 4.0
]
dataPtsCalc = [
-1.21, -.445, .466, .226, -.694, -.575, 2.73, -1.49, -1.45, -.193,
4.0
]
localErrors = [
2.0, 2.0, 0.223069590086, 1.57075023742, 2.0, 1.48379279006, 2.0,
2.0, 2.0, 2.0, 0.0
]
smape = SymmetricMeanAbsolutePercentageError()
for idx in xrange(len(dataPtsOrg)):
le = smape.local_error([dataPtsOrg[idx]], [dataPtsCalc[idx]])
ple = localErrors[idx]
## compare the strings due to accuracy
assert str(le) == str(ple)
