def test_radial_histogram():
""" Test circular histogram"""
# Testing vals
dir_vals = [0, 0, 0, 10, 85, 90, 95, 170, 285, 288]
spd_vals = dir_vals
# Make into fake data collections
a_per = AnalysisPeriod(6, 21, 12, 6, 21, 13)
dates = [DateTime(6, 21, i) for i in range(len(dir_vals))]
spd_header = Header(Speed(), 'm/s', a_per)
dir_header = Header(GenericType('Direction', 'deg'), 'deg', a_per)
spd_data = HourlyDiscontinuousCollection(spd_header, spd_vals, dates)
dir_data = HourlyDiscontinuousCollection(dir_header, dir_vals, dates)
# Init simple dir set divided by 4
w = WindRose(dir_data, spd_data, 4)
# Testing
bin_vecs = w.bin_vectors
vec_cpt = (0, 0)
radius_arr = (0., 1.)
ytick_num = 1
hist = w.histogram_data
histstack = w._histogram_data_stacked(hist, ytick_num)
show_stack = False
vecs = WindRose._histogram_array_radial(bin_vecs, vec_cpt, hist, histstack,
radius_arr, show_stack)
def test_radial_histogram_plot():
""" Test circular histogram"""
# Testing vals ensure all histogram heights are equal.
dir_vals = [3, 3, 10, # 315 - 45
85, 90, 95, # 45 - 135
170, 170, 170, # 135 - 225
230, 285, 288] # 225 - 315
spd_vals = dir_vals
# Make into fake data collections
a_per = AnalysisPeriod(6, 21, 12, 6, 21, 13)
dates = [DateTime(6, 21, i) for i in range(len(dir_vals))]
spd_header = Header(Speed(), 'm/s', a_per)
dir_header = Header(GenericType('Direction', 'deg'), 'deg', a_per)
spd_data = HourlyDiscontinuousCollection(spd_header, spd_vals, dates)
dir_data = HourlyDiscontinuousCollection(dir_header, dir_vals, dates)
# Init simple dir set divided by 4
w = WindRose(dir_data, spd_data, 4)
f = _deg2rad
cos, sin = math.cos, math.sin
# Testing
bin_vecs = w.bin_vectors
vec_cpt = (0, 0)
radius_arr = (0., 1.)
hist = w.histogram_data
speeds = [val for bin in w.histogram_data for val in bin]
min_speed, max_speed = min(speeds), max(speeds)
speed_interval = (max_speed - min_speed) / w.legend_parameters.segment_count
histstack, _ = w._histogram_data_nested(
hist, (min_speed, max_speed), speed_interval)
show_freq = False
vecs = WindRose._histogram_array_radial(bin_vecs, vec_cpt, hist, histstack,
radius_arr, show_freq)
# Make bins of equal height (unit circle)
chk_bin_vecs = [[(cos(f(225)), -sin(f(225))), # 0 west
(cos(f(-45)), -sin(f(-45)))],
[(cos(f(-45)), -sin(f(-45))), # 1 north
(cos(f(45)), -sin(f(45)))],
[(cos(f(45)), -sin(f(45))), # 2 east
(cos(f(135)), -sin(f(135)))],
[(cos(f(135)), -sin(f(135))), # 3 south
(cos(f(225)), -sin(f(225)))]]
for i in range(len(chk_bin_vecs)):
vec2, vec1 = chk_bin_vecs[i][0], chk_bin_vecs[i][1]
chk_pts = [vec1, vec2]
pts = vecs[i][1:] # Get rid of cpt (0, 0)
for p, cp in zip(pts, chk_pts):
assert abs(p[0] - cp[0]) < 1e-10, (p[0], cp[0])
assert abs(p[1] - cp[1]) < 1e-10, (p[1], cp[1])
