def get_chart_url(data):
chart = GroupedVerticalBarChart(800, 200, y_range=(0, max(data)))
chart.set_bar_width(3) #should be calculated
chart.set_bar_spacing(0)
chart.set_colours(['4D89F9'])
chart.add_data(data)
return chart.get_url()
def grouped_vertical():
chart = GroupedVerticalBarChart(settings.width, settings.height,
y_range=(0, 35))
chart.set_bar_width(5)
chart.set_colours(['00ff00', 'ff0000'])
chart.add_data([1,2,3,4,5])
chart.add_data([1,4,9,16,25])
chart.download('bar-vertical-grouped.png')
def bargraph(self, days, bars, output, title=""):
data = []
min_count = 0
max_count = 0
date = lambda i: datetime.date.today() + datetime.timedelta(-days + i)
for i in range(0, days + 1):
count = bars[date(i)]
max_count = max(count, max_count)
min_count = min(count, min_count)
data.append(count)
# TOFIX: google chart API for negative numbers is too screwy, for now only >0
min_count = max(min_count, 0)
chart = GroupedVerticalBarChart(800,
300,
y_range=[min_count, max_count])
chart.add_data(data)
chart.set_bar_width(500 / days)
# Set the line colour to blue
chart.set_colours(['0000FF'])
# Set the horizontal dotted lines
chart.set_grid(0, 25, 5, 5)
if days >= 30:
fmt = "%d"
else:
fmt = "%d/%m"
chart.set_axis_labels(Axis.BOTTOM, \
[date(i).strftime(fmt) for i in range(0,days)])
# The Y axis labels contains 0 to 100 skipping every 25, but remove the
# first number because it's obvious and gets in the way of the first X
# label.
delta = float(max_count - min_count) / 100
skip = max(int(delta) / 5 * 100, 100)
left_axis = range(0, max_count + 1, skip)
left_axis[0] = ''
chart.set_axis_labels(Axis.LEFT, left_axis)
if len(title) > 0:
chart.set_title(title % days)
chart.download(output)
def _bar_graph(data,
legends,
axis_labels,
size,
steps,
type=StackedVerticalBarChart,
multiline=False):
if multiline:
max_values = []
min_values = []
for row in data:
max_values.append(max(row))
min_values.append(min(row))
max_value = max(max_values)
min_value = min(min_values)
else:
max_value = max(data)
min_value = min(data)
#validando si hay datos para hacer grafico
if max_value == 0:
return None
step = ((max_value * 1.05) - (min_value * 0.95)) / steps
#validando en caso de el paso sea menor que uno y de cero en la conversion
if step < 1:
step = 1
tope = int(round(max_value * 1.05))
if tope < max_value:
tope += 2
else:
tope += 1
left_axis = range(int(round(min_value * 0.95)), tope, int(step))
left_axis[0] = ''
if type == StackedHorizontalBarChart:
graph = StackedHorizontalBarChart(size[0],
size[1],
x_range=(0, max_value * 1.05))
graph.set_axis_labels(Axis.BOTTOM, left_axis)
if axis_labels:
graph.set_axis_labels(Axis.LEFT, axis_labels)
elif type == StackedVerticalBarChart:
graph = StackedVerticalBarChart(size[0],
size[1],
y_range=(0, max_value * 1.05))
graph.set_axis_labels(Axis.LEFT, left_axis)
if axis_labels:
graph.set_axis_labels(Axis.BOTTOM, axis_labels)
elif type == GroupedHorizontalBarChart:
graph = GroupedHorizontalBarChart(size[0],
size[1],
x_range=(0, max_value * 1.05))
graph.set_axis_labels(Axis.BOTTOM, left_axis)
if axis_labels:
graph.set_axis_labels(Axis.LEFT, axis_labels)
graph.set_bar_spacing(5)
elif type == GroupedVerticalBarChart:
graph = GroupedVerticalBarChart(size[0],
size[1],
y_range=(0, max_value * 1.05))
graph.set_axis_labels(Axis.LEFT, left_axis)
if axis_labels:
graph.set_axis_labels(Axis.BOTTOM, axis_labels)
graph.set_bar_spacing(5)
else:
pass #raise exception
if multiline:
for fila in data:
graph.add_data(fila)
else:
graph.add_data(data)
graph.set_colours(
['FFBC13', '22A410', 'E6EC23', '2B2133', 'BD0915', '3D43BD'])
graph.set_bar_width(44)
graph.set_legend(legends)
graph.set_legend_position('b')
return graph
def PrintAverageCharts(dataviews):
# another chart that shows the deviation from the average over the week, as a bar chart
print '<table frame="border">'
ncols = 3
print '<tr><td colspan="%d" align="center" style="font-family:Arial;">Averaged Pollutants per day of week</td></tr>' % ncols
icharts = 0
for title, view in dataviews:
weekchart = dict(
[d, dict([k, []] for k in view.keys())] for d in range(7)
) # for each day of the week, and for each data type an empty list
# for each dataset in this view, put datapoint into the list of the week day
for k in view:
data = view[k]
for iday in range(len(data)):
weekchart[(iday + firstweekday) % 7][k].append(data[iday])
# bar chart of averages per day
datasets = []
max_y = None
for k in view:
data = [0. for i in range(7)]
for d in weekchart:
data[d] = sum(weekchart[d][k]) / len(weekchart[d][k])
datasets.append(data)
max_y = max(max_y, max(data))
# bar chart
c = GroupedVerticalBarChart(400, 250, y_range=[0, max_y])
c.set_bar_width(20 / len(datasets))
c.set_bar_spacing(0)
if len(datasets) > 1:
c.set_legend([k[0] for k in view.keys()])
# Set the line colours
c.set_colours(['0000FF', 'FF0000'])
for data in datasets:
c.add_data(data)
# y axis labels
if max_y > 30:
left_axis = range(0, int(max_y) + 1, 5)
elif max_y > 10:
left_axis = range(0, int(max_y) + 1, 1)
elif max_y > 5:
left_axis = []
v = 0.
while v < max_y + 0.5:
left_axis.append(v)
v += 0.5
else:
left_axis = []
v = 0.
while v < max_y + 0.1:
left_axis.append(v)
v += 0.1
left_axis[0] = '' # no label at 0
c.set_axis_labels(Axis.LEFT, left_axis)
c.set_axis_labels(Axis.BOTTOM, [weekdays[d] for d in weekchart.keys()])
if icharts % ncols == 0:
print '%s<tr>' % (icharts > 0 and '</tr>' or '')
print '<td><img src="%s&chtt=%s"></td>' % (c.get_url(), title)
icharts += 1
print '</tr></table>'
def __bar_graphic__(data,
legends,
axis_labels,
size,
steps,
type=StackedVerticalBarChart,
multiline=False):
if multiline:
max_values = []
min_values = []
for row in data:
max_values.append(max(row))
min_values.append(min(row))
max_value = max(max_values)
min_value = min(min_values)
else:
max_value = max(data)
min_value = min(data)
step = ((max_value * 1.05) - (min_value * 0.95)) / steps
left_axis = range(int(min_value * 0.95), int(max_value * 1.05), int(step))
left_axis[0] = ''
if type == StackedHorizontalBarChart:
graph = StackedHorizontalBarChart(size[0],
size[1],
x_range=(0, max_value * 1.05))
graph.set_axis_labels(Axis.BOTTOM, left_axis)
graph.set_axis_labels(Axis.LEFT, axis_labels)
elif type == StackedVerticalBarChart:
graph = StackedVerticalBarChart(size[0],
size[1],
y_range=(0, max_value * 1.05))
graph.set_axis_labels(Axis.LEFT, left_axis)
graph.set_axis_labels(Axis.BOTTOM, axis_labels)
elif type == GroupedHorizontalBarChart:
graph = GroupedHorizontalBarChart(size[0],
size[1],
x_range=(0, max_value * 1.05))
graph.set_axis_labels(Axis.BOTTOM, left_axis)
graph.set_axis_labels(Axis.LEFT, axis_labels)
graph.set_bar_spacing(5)
elif type == GroupedVerticalBarChart:
graph = GroupedVerticalBarChart(size[0],
size[1],
y_range=(0, max_value * 1.05))
graph.set_axis_labels(Axis.LEFT, left_axis)
graph.set_axis_labels(Axis.BOTTOM, axis_labels)
graph.set_bar_spacing(5)
else:
pass #raise exception
if multiline:
for fila in data:
graph.add_data(fila)
else:
graph.add_data(data)
graph.set_colours(
['FFBC13', '22A410', 'E6EC23', '2B2133', 'BD0915', '3D43BD'])
graph.set_bar_width(40)
graph.set_legend(legends)
graph.set_legend_position('b')
return graph
