Bar charts in PDF file

Vertical Bar chart

from reportlab.graphics.charts.barcharts import VerticalBarChart

data = [
 (13, 15, 20, 22, 37, 42, 19, 4),
 (14, 16, 21, 23, 38, 41, 20, 5)
]

Category Axis and Value Axis

from reportlab.lib import colors
my_path='G:\\My drive\\testing\\pypdf2\\my_pdf.pdf' 
from reportlab.graphics.shapes import Drawing
from reportlab.graphics.charts.barcharts import VerticalBarChart
d = Drawing(600, 400) # width , height 
bc = VerticalBarChart()
data = [
 (13, 15, 20, 22, 37, 42, 19, 4),
 (14, 16, 21, 23, 38, 41, 20, 5)
]

bc.x = 50  # horizontal position
bc.y = 50  # vertical position 
bc.height = 340 # height of the chart area
bc.width = 530  # width of the chart area
bc.data = data
bc.strokeColor = colors.black # bar edges colour 

bc.bars[0].fillColor = colors.yellow  # first member of group bar 
bc.bars[1].fillColor = colors.lightgreen # second member of group 
bc.groupSpacing = 10  # gap between groups 
bc.barSpacing = 2.5   # gap within groups ( among members ) 
bc.valueAxis.valueMin = 0 # value Axis 
bc.valueAxis.valueMax = 50
bc.valueAxis.valueStep = 10
bc.categoryAxis.labels.boxAnchor = 'ne'
bc.categoryAxis.labels.dx = 5 
bc.categoryAxis.labels.dy = -2
bc.categoryAxis.labels.angle = 30
#bc.categoryAxis.style = 'stacked' # stacked bar graph, parallel 
bc.categoryAxis.categoryNames = ['Jan-22','Feb-22','Mar-22',
 'Apr-22','May-22','Jun-22','Jul-22','Aug-22']
d.add(bc, '')
from reportlab.graphics import renderPDF
renderPDF.drawToFile(d, my_path, '')

Background colour of the chart

bc.fillColor=colors.yellow # background colour

Colour of bars

bc.bars[0].fillColor=colors.yellow #first member of group bar 
bc.bars[1].fillColor=colors.lightgreen # second member of group bar 

Colour of individual bar

bc.bars[(0, 0)].fillColor = colors.blue # left bar of first group
bc.bars[(0, 1)].fillColor = colors.yellow # left bar of second group
bc.bars[(1,2)].fillColor=colors.red # right bar of 3rd group

Horizontal bar chart

from reportlab.lib import colors
my_path='G:\\My drive\\testing\\pypdf2\\my_pdf.pdf' 
from reportlab.graphics.shapes import Drawing
from reportlab.graphics.charts.barcharts import HorizontalBarChart
d=Drawing(620,400) # width , height
#bc=VerticalBarChart()
bc=HorizontalBarChart()
data = [
 (13, 15, 20, 22, 37, 42, 19, 4),
 (14, 16, 21, 23, 38, 41, 20, 5)
]
bc.x = 50  # horizontal position
bc.y = 50  # vertical position 
bc.height = 345 # height of the chart area
bc.width = 545  # width of the chart area
bc.data = data
bc.strokeColor = colors.black
#bc.fillColor=colors.yellow
bc.bars[0].fillColor=colors.yellow
bc.bars[1].fillColor=colors.lightgreen
bc.bars[(0,5)].fillColor=colors.red
bc.groupSpacing = 8
bc.barSpacing = 2
bc.valueAxis.valueMin = 0
bc.valueAxis.valueMax = 50
bc.valueAxis.valueStep = 5
bc.categoryAxis.labels.boxAnchor = 'ne'
bc.categoryAxis.labels.dx = -10
bc.categoryAxis.labels.dy = 5
bc.categoryAxis.labels.angle = 30
bc.categoryAxis.categoryNames = ['Jan-22','Feb-22','Mar-22',
 'Apr-22','May-22','Jun-22','Jul-22','Aug-22']
d.add(bc, '')

from reportlab.graphics import renderPDF
renderPDF.drawToFile(d, my_path, '')

Stacked chart

bc.categoryAxis.style='stacked'

Subhendu Mohapatra

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