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## Description
Bar chart example
## Code
```ruby
require 'axlsx'
p = Axlsx::Package.new
wb = p.workbook
wb.add_worksheet(name: 'Bar Chart') do |sheet|
sheet.add_row ['A Simple Bar Chart']
sheet.add_row ['A', 3]
sheet.add_row ['B', 10]
sheet.add_row ['C', 7]
sheet.add_chart(Axlsx::Bar3DChart, start_at: 'A6', end_at: 'F20') do |chart|
chart.add_series data: sheet['B2:B4'], labels: sheet['A2:A4'], title: sheet['A1']
chart.valAxis.gridlines = false
chart.catAxis.gridlines = false
end
end
p.serialize 'hide_gridlines_in_chart_example.xlsx'
```
## Output

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