使用 Openpyxl python 3.7 在散点图中自定义 X 轴刻度

Question

I am trying to add customized x-axis ticks from particular column values, similar to set_categories of a pie-chart. I have gone through the documentation and failed to find any solution. Below is my code:

from openpyxl.chart import ScatterChart, Reference, Series 
wb = openpyxl.Workbook() 
sheet = wb.active 
rows = [ 
    ("Number", "Sales", "Market")   , 
    ("Number of Products", "Sales in USD", "Market share"), 
    ('0x1', 12200, 15), 
    ('0x2', 60000, 33), 
    ('0x3', 24400, 10), 
    ('0x4', 32000, 42), 
] 
for row in rows: 
    sheet.append(row) 
  
chart = ScatterChart() 
  
xvalues = Reference(sheet, min_col = 1, min_row = 3, max_row = 6) 
yvalues = Reference(sheet, min_col = 2,   min_row = 3, max_row = 6) 
size = Reference(sheet, min_col = 3,  min_row = 3, max_row = 6) 
series = Series(values = yvalues, xvalues =xvalues , zvalues =size , title ="2013") 
chart.series.append(series) 
  
chart.title = " SCATTER-CHART "
chart.x_axis.title = " X_AXIS "
chart.y_axis.title = " Y_AXIS "
sheet.add_chart(chart, "E2") 
wb.save(" ScatterChart.xlsx")

Can any one tell me how to add xvalues to x-axis ticks. This is the expected graph I am looking for:

Answer 1

I believe your goal as follows:

• You want to add xvalues to x-axis ticks
• You want to do this by creating a simple line chart?

Observations:

• You are creating a ScatterChart and trying to set x-axis ticks using string labels, which is not supported by this chart type, only numeric values are supported.

Solution

1. Change chart type from ScatterChart to LineChart (or BarChart if still serves the same objective).
2. Modify the chart build parameters

Modified Solution Code:

• LINE CHART

from openpyxl import Workbook
from openpyxl.chart import LineChart

wb = Workbook() 
sheet = wb.active 

rows = [ 
    ("Number", "Sales", "Market")   , 
    ("Number of Products", "Sales in USD", "Market share"), 
    ('0x1', 12200, 15), 
    ('0x2', 60000, 33), 
    ('0x3', 24400, 10), 
    ('0x4', 32000, 42), 
] 
for row in rows: 
    sheet.append(row) 

# build chart
chart = LineChart() 
# label chart
chart.title = " SCATTER-CHART "
chart.x_axis.title = " X_AXIS "
chart.y_axis.title = " Y_AXIS "

# define data series and domain range
xvalues = Reference(sheet, min_col = 1, min_row = 3, max_row = 6) 
yvalues = Reference(sheet, min_col = 2, min_row = 3, max_row = 6) 
# add data to chart
chart.add_data(yvalues)
chart.set_categories(xvalues)
sheet.add_chart(chart, 'E2')
# save file
wb.save('LineChart.xlsx')

Output chart image