Python - Plotting scatter charts in excel sheet using XlsxWriter module

PythonServer Side ProgrammingProgramming

A scatter plot is a type of plot or mathematical diagram using Cartesian coordinates to display values for typically two variables for a set of data. If the points are coded, one additional variable can be displayed.

Example

# import xlsxwriter module
import xlsxwriter
# Workbook() takes one, non-optional, argument which is the filename #that we want to create.
workbook = xlsxwriter.Workbook('chart_scatter.xlsx')
# The workbook object is then used to add new worksheet via the #add_worksheet() method.  
worksheet = workbook.add_worksheet()      
# Create a new Format object to formats cells in worksheets using #add_format() method .    
# here we create bold format object .
bold = workbook.add_format({'bold': 1})    
# create a data list .
headings = ['Number', 'Batch 1', 'Batch 2']    
data = [
   [2, 3, 4, 5, 6, 7],
   [80, 80, 100, 60, 50, 100],
   [60, 50, 60, 20, 10, 20],
]      
# Write a row of data starting from 'A1' with bold format .
worksheet.write_row('A1', headings, bold)    
# Write a column of data starting from 'A2', 'B2', 'C2' respectively
worksheet.write_column('A2', data[0])
worksheet.write_column('B2', data[1])
worksheet.write_column('C2', data[2])    
# Create a chart object that can be added to a worksheet using #add_chart() method.    
# here we create a scatter chart object .
chart1 = workbook.add_chart({'type': 'scatter'})    
# Add a data series to a chart using add_series method.    
# Configure the first series.
# = Sheet1 !$A$1 is equivalent to ['Sheet1', 0, 0].  
# note : spaces is not inserted in b / w
# = and Sheet1, Sheet1 and !
# if space is inserted it throws warning.
chart1.add_series({
   'name':       '= Sheet1 !$B$1',
   'categories': '= Sheet1 !$A$2:$A$7',
   'values':     '= Sheet1 !$B$2:$B$7',
})    
# Configure a second series.
# Note use of alternative syntax to define ranges.
# [sheetname, first_row, first_col, last_row, last_col].
chart1.add_series({
   'name':       ['Sheet1', 0, 2],
   'categories': ['Sheet1', 1, 0, 6, 0],
   'values':     ['Sheet1', 1, 2, 6, 2],
})      
# Add a chart title  
chart1.set_title ({'name': 'Results of data analysis'})
# Add x-axis label
chart1.set_x_axis({'name': 'Test number'})
# Add y-axis label
chart1.set_y_axis({'name': 'Data length (mm)'})
# Set an Excel chart style.
chart1.set_style(11)
# add chart to the worksheet the top-left corner of a chart  
# is anchored to cell E2 .  
worksheet.insert_chart('E2', chart1)
# Finally, close the Excel file via the close() method.  
workbook.close()
raja
Published on 06-Aug-2020 16:38:49
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