def test_format_small_numbers(self):
fmt = BasicFormatter()
numlabels = 8
# test with small numbers
scale = FixedScale(resolution=1e-4)
start, end = 5e-5, 8.5e-4
ticks = scale.ticks(start, end, numlabels)
labels = fmt.format(ticks, numlabels, None)
desired = [str(float(i)) + "e-4" for i in range(1, 9)]
self.check_labels(labels, desired)
def test_format_small_numbers(self):
fmt = BasicFormatter()
numlabels = 8
# test with small numbers
scale = FixedScale(resolution = 1e-4)
start, end = 5e-5, 8.5e-4
ticks = scale.ticks(start, end, numlabels)
labels = fmt.format(ticks, numlabels, None)
desired = [str(float(i))+"e-4" for i in range(1, 9)]
self.check_labels(labels, desired)
def test_format(self):
fmt = BasicFormatter()
# test with a fixed scale
scale = FixedScale(resolution=1.0)
start, end = 12.0, 18.0
numlabels = 8
ticks = scale.ticks(start, end, numlabels)
labels = fmt.format(ticks, numlabels, None)
# desired = [str(float(x)) for x in range(12, 19)]
## This test fails when desired is created with str(float(x)).
## The format function returns "12",...,"18", not "12.0",...,"18.0".
desired = ["12", "13", "14", "15", "16", "17", "18"]
self.check_labels(labels, desired)
def test_format(self):
fmt = BasicFormatter()
# test with a fixed scale
scale = FixedScale(resolution = 1.0)
start, end = 12.0, 18.0
numlabels = 8
ticks = scale.ticks(start, end, numlabels)
labels = fmt.format(ticks, numlabels, None)
# desired = [str(float(x)) for x in range(12, 19)]
## This test fails when desired is created with str(float(x)).
## The format function returns "12",...,"18", not "12.0",...,"18.0".
desired = ["12","13","14","15","16","17","18"]
self.check_labels(labels, desired)
def test2_nice_sci(self):
# The table of numerical values and their proper representation
# given a certain number of mantissa digits
vals = [ (3.14159e10, (2, "3e10"), (3, '3.1e10'), (5, '3.141e10')),
(123456789, (3, '1.2e8'), (5, '1.234e8')),
(-123456, (2, "-1e5"), (3, "-1e5"), (4, "-1.2e5")),
(123, (2, "1e2"), (3, "1.2e2"), (4, "1.23e2")),
(1.234, (2, "1"), (3, "1.2"), (4, "1.23")),
]
fmt = BasicFormatter()
for lst in vals:
val = lst[0]
for mdigits, desired in lst[1:]:
s = fmt._nice_sci(val, mdigits)
if s != desired:
print "Mismatch for", val, "; desired:", desired, "actual:", s
def test2_nice_sci(self):
# The table of numerical values and their proper representation
# given a certain number of mantissa digits
vals = [ (3.14159e10, (2, "3e10"), (3, '3.1e10'), (5, '3.141e10')),
(123456789, (3, '1.2e8'), (5, '1.234e8')),
(-123456, (2, "-1e5"), (3, "-1e5"), (4, "-1.2e5")),
(123, (2, "1e2"), (3, "1.2e2"), (4, "1.23e2")),
(1.234, (2, "1"), (3, "1.2"), (4, "1.23")),
]
fmt = BasicFormatter()
for lst in vals:
val = lst[0]
for mdigits, desired in lst[1:]:
s = fmt._nice_sci(val, mdigits)
if s != desired:
print "Mismatch for", val, "; desired:", desired, "actual:", s
def test_estimate_default_scale(self):
fmt = BasicFormatter()
scale = DefaultScale()
# Test using numlabels
test_intervals = ((12., 18., 8),
(-4., 16., 10),
(5e-5, 8.5e-4, 8),
(3e8, 6e8, 8),
)
for start, end, numlabels in test_intervals:
estimate = fmt.estimate_width(start, end, numlabels, ticker=scale)[1]
ticks = scale.ticks(start, end, numlabels)
labels = fmt.format(ticks, numlabels, None)
actual = sum(map(len, labels))
err = abs(estimate - actual) / actual
self.assertLess(err, 0.5)
return
def test_estimate_default_scale(self):
fmt = BasicFormatter()
scale = DefaultScale()
# Test using numlabels
test_intervals = ((12., 18., 8),
(-4., 16., 10),
(5e-5, 8.5e-4, 8),
(3e8, 6e8, 8),
)
for start, end, numlabels in test_intervals:
estimate = fmt.estimate_width(start, end, numlabels, ticker=scale)[1]
ticks = scale.ticks(start, end, numlabels)
labels = fmt.format(ticks, numlabels, None)
actual = sum(map(len, labels))
err = abs(estimate - actual) / actual
self.assertLess(err, 0.5)
return
def __init__(self, formatter=None):
if formatter is None:
formatter = BasicFormatter()
self.formatter = formatter
def __init__(self, resolution, zero=0.0, formatter=None):
self.resolution = resolution
self.zero = zero
if formatter is None:
formatter = BasicFormatter()
self.formatter = formatter