def __init__(self, *args, **kwargs):
"""Create a Vega Bar Chart"""
super(Bar, self).__init__(*args, **kwargs)
#Scales
self.scales['x'] = Scale(name='x', type='ordinal', range='width',
domain=DataRef(data='table', field="data.idx"))
self.scales['y'] = Scale(name='y', range='height', nice=True,
domain=DataRef(data='table', field="data.val"))
self.axes.extend([Axis(type='x', scale='x'),
Axis(type='y', scale='y')])
#Marks
enter_props = PropertySet(x=ValueRef(scale='x', field="data.idx"),
y=ValueRef(scale='y', field="data.val"),
width=ValueRef(scale='x', band=True,
offset=-1),
y2=ValueRef(scale='y', value=0))
update_props = PropertySet(fill=ValueRef(value='steelblue'))
mark = Mark(type='rect', from_=MarkRef(data='table'),
properties=MarkProperties(enter=enter_props,
update=update_props))
self.marks.append(mark)
def test_scale_from_data(self):
data = [[1, 2, 3], [2, -1, -4]]
expected_scale = np.array([1.0 / 2.0, 1.0 / 2.0, 1.0 / 4.0])
calculated_scale = Scale.scale_from_data(data)
testing.assert_array_equal(expected_scale, calculated_scale.factors)
def __init__(self, *args, **kwargs):
"""Create a Vega Line Chart"""
super(Line, self).__init__(*args, **kwargs)
#Line Updates
self.scales['x'].type = 'linear'
self.scales['y'].type = 'linear'
if self._is_datetime:
self.scales['x'].type = 'time'
self.scales['color'] = Scale(name='color', type='ordinal',
domain=DataRef(data='table', field='data.col'),
range='category20')
del self.marks[0]
transform = MarkRef(data='table',
transform=[Transform(type='facet', keys=['data.col'])])
enter_props = PropertySet(x=ValueRef(scale='x', field="data.idx"),
y=ValueRef(scale='y', field="data.val"),
stroke=ValueRef(scale="color", field='data.col'),
stroke_width=ValueRef(value=2))
new_mark = Mark(type='group', from_=transform,
marks=[Mark(type='line',
properties=MarkProperties(enter=enter_props))])
self.marks.append(new_mark)
def __init__(self, *args, **kwargs):
"""Create a Vega Grouped Bar Chart"""
if 'grouped' not in kwargs:
kwargs['grouped'] = True
super(GroupedBar, self).__init__(*args, **kwargs)
del self.data['stats']
del self.scales['y'].type
self.scales['y'].domain.field = 'data.val'
self.scales['y'].domain.data = 'table'
self.scales['x'].padding = 0.2
del self.marks[0].from_.transform[1]
self.marks[0].from_.transform[0].keys[0] = 'data.idx'
enter_props = PropertySet(x=ValueRef(scale='x', field="key"),
width=ValueRef(scale='x', band=True))
self.marks[0].properties = MarkProperties(enter=enter_props)
self.marks[0].scales = KeyedList()
self.marks[0].scales['pos'] = Scale(name='pos', type='ordinal',
range='width',
domain=DataRef(field='data.group'))
self.marks[0].marks[0].properties.enter.width.scale = 'pos'
self.marks[0].marks[0].properties.enter.y.field = 'data.val'
self.marks[0].marks[0].properties.enter.x.field = 'data.group'
self.marks[0].marks[0].properties.enter.x.scale = 'pos'
del self.marks[0].marks[0].properties.enter.y2.field
self.marks[0].marks[0].properties.enter.y2.value = 0
def test_gradient_descent(self):
scale = Scale.scale_from_data(self.test_dataset)
# self.logreg = LogisticRegressor(self.train_dataset, self.train_labels, scale=scale)
self.logreg = LogisticRegressor(self.train_dataset, self.train_labels)
gr = GradientDescentRunner(self.logreg.get_gradient(), len(self.samples[0]) + 1,
self.logreg.get_error_function(), alpha=1e-8, max_iter=300)
weights = gr.run()
self.logreg.weights = weights
mismatches = 0
predictions = [self.logreg.predict(test_data) for test_data in self.test_dataset]
print "All predictions: ", predictions
for test_data, label in zip(self.test_dataset, self.test_labels):
prediction = self.logreg.predict(test_data)
if prediction != label:
mismatches +=1
# print "Mismatch! Predicted ", prediction, ", True ", label
total = len(self.test_dataset)
print "total data: ", total
print "total mismatch: ", mismatches
print "percentage success: ", (100 - float(mismatches) / float(total) * 100), "%"
def test_gradient_descent(self):
scale = Scale.scale_from_data(self.test_dataset)
# self.logreg = LogisticRegressor(self.train_dataset, self.train_labels, scale=scale)
self.logreg = LogisticRegressor(self.train_dataset, self.train_labels)
gr = GradientDescentRunner(self.logreg.get_gradient(),
len(self.samples[0]) + 1,
self.logreg.get_error_function(),
alpha=1e-8,
max_iter=300)
weights = gr.run()
self.logreg.weights = weights
mismatches = 0
predictions = [
self.logreg.predict(test_data) for test_data in self.test_dataset
]
print "All predictions: ", predictions
for test_data, label in zip(self.test_dataset, self.test_labels):
prediction = self.logreg.predict(test_data)
if prediction != label:
mismatches += 1
# print "Mismatch! Predicted ", prediction, ", True ", label
total = len(self.test_dataset)
print "total data: ", total
print "total mismatch: ", mismatches
print "percentage success: ", (
100 - float(mismatches) / float(total) * 100), "%"
def __init__(self,
x_scale=None,
y_scale=None,
mark=None,
width=None,
height=None):
if x_scale:
self.x_scale = x_scale
else:
self.x_scale = Scale(name='x',
range='width',
type='ordinal',
domain=DataRef(data='table', field='data.x'))
if y_scale:
self.y_scale = y_scale
else:
self.y_scale = Scale(name='y',
range='height',
type='linear',
nice=True,
domain=DataRef(data='table', field='data.y'))
if mark:
self.mark = mark
else:
self.mark = Mark(
type='rect',
from_=MarkRef(data='table'),
properties=MarkProperties(
enter=PropertySet(x=ValueRef(scale='x', field='data.x'),
y=ValueRef(scale='y', field='data.y'),
width=ValueRef(scale='x',
band=True,
offset=-1),
y2=ValueRef(scale='y', value=0)),
update=PropertySet(fill=ValueRef(value='steelblue'))))
self.width = width or 400
self.height = height or 200
self.padding = {'top': 10, 'left': 30, 'bottom': 20, 'right': 10}
self.x_axis = Axis(type='x', scale='x')
self.y_axis = Axis(type='y', scale='y')
def __init__(self, samples, labels, weights=None, scale=None):
# list_X = [r + [1] for r in samples]
list_X = [r for r in samples]
self.X = array(list_X)
self.Y = array(labels)
self.weights = weights
if scale is None:
self.scale = Scale.unit_scale(len(list_X[0]))
else:
# self.scale = scale.add_unit_elements(1)
self.scale = scale
def __init__(self, train_data, train_labels, weights=None, scale=None):
# Adding 1 at the end for the constant term
list_X = [r + [1] for r in train_data]
if scale is None:
self.scale = Scale.unit_scale(len(list_X[0]))
else:
self.scale = scale.add_unit_elements(1)
self.weights = weights
self.X = self.scale(np.array(list_X))
self.Y = np.array(train_labels)
def __init__(self, train_data, train_labels, weights=None, scale=None):
# Adding 1 at the end for the constant term
list_X = [r + [1] for r in train_data]
if scale is None:
self.scale = Scale.unit_scale(len(list_X[0]))
else:
self.scale = scale.add_unit_elements(1)
self.weights = weights
self.X = self.scale(np.array(list_X))
self.Y = np.array(train_labels)
# SPDX-FileCopyrightText: 2021 Jose David M
#
# SPDX-License-Identifier: MIT
#############################
"""
This is a basic demonstration of a Scale Class.
"""
import time
import board
from scales import Scale
display = board.DISPLAY
my_scale = Scale(
x=50,
y=180,
direction="vertical",
divisions=3,
limits=(0, 80),
)
display.show(my_scale)
values = [56, 58, 60, 65, 63, 60, 56, 54, 53, 42, 43, 44, 45, 52, 54]
for val in values:
my_scale.animate_pointer(val)
time.sleep(2)
def test_mul(self):
scale = Scale.unit_scale(3)
two_scale = scale * 2
a = np.array([1, 2, 3])
scaled_a = two_scale.scale(a)
testing.assert_array_equal(a * 2, scaled_a)
def test_basic(self):
factors = [2, 3, 4]
scale = Scale(np.array(factors))
ones = np.ones(3)
scaled_a = scale.scale(ones)
testing.assert_array_equal(factors, scaled_a)
def test_less_that_one(self):
factors = [0.1, 0.2, 0.3]
scale = Scale(np.array(factors))
ones = np.ones(3)
scaled_a = scale.scale(ones)
testing.assert_array_equal(factors, scaled_a)
def test_scale_on_2D_arrays(self):
a = np.array([[1, 2, 3], [2, 3, 4]])
scale = Scale(np.array([0.5, 2, 0]))
scaled_a = scale(a)
testing.assert_array_equal(scale(a[0]), scaled_a[0])
testing.assert_array_equal(scale(a[1]), scaled_a[1])
def build_chart():
# LAYOUT
layout = Layout()
layout.configure(plot_width=1200)
# TIME WINDOW
today = date.toordinal(date.today())
duration = 21
end = today + duration
# PLOT
plot = Plot()
plot.x = layout.plot.x
plot.y = layout.plot.y
plot.width = layout.plot.width
plot.height = layout.plot.height
plot.start = today
plot.finish = end
plot.clean_dates()
plot.calculate_resolution()
# SCALES
scale = Scale()
scale.x = layout.scales_top.x
scale.y = layout.scales_top.y
scale.width = layout.scales_top.width
scale.height = layout.scales_top.height / 4
scale.start = plot.start
scale.finish = plot.finish
scale.resolution = plot.resolution
scale.interval_type = 'days'
scale.week_start = 0
scale.min_label_width = 20
scale.box_fill = 'pink'
scale.ends = 'yellow'
scale.label_type = 'd'
scale.date_format = 'a w'
scale.separator = '-'
scale.font_size = 10
scale.text_x = 10
scale.text_y = scale.height * 0.65
# GRID
grid = Grid()
grid.interval_type = 'WEEKS'
grid.week_start = 0
grid.x = layout.plot.x
grid.y = layout.plot.y
grid.height = plot.height
grid.start = plot.start
grid.finish = plot.finish
grid.resolution = plot.resolution
grid.line_width = 0.5
# VIEWPORT
viewport = ViewPort()
viewport.width = layout.chart.width
viewport.height = layout.chart.height
viewport.child_elements = [layout, scale, grid]
viewport.order_child_elements()
viewport.render_child_elements()
return viewport.svg
def test_unit_scale(self):
scale = Scale.unit_scale(3)
a = np.array([1, 2, 3])
scaled_a = scale.scale(a)
testing.assert_array_equal(a, scaled_a)
