如何在Julia中绘制条形图？

using Pkg
Pkg.add("Plots")
using Plots

# 定义数据
categories = ["A", "B", "C", "D"]
values = [10, 20, 30, 40]

# 绘制条形图
bar(categories, values, title="Bar Chart Example", xlabel="Categories", ylabel="Values")

bar(categories, values, title="Bar Chart Example", xlabel="Categories", ylabel="Values", color=:blue, bar_width=0.5)

# 定义堆叠条形图的数据
categories = ["A", "B", "C", "D"]
values1 = [10, 20, 30, 40]
values2 = [5, 15, 25, 35]

# 绘制堆叠条形图
bar(categories, values1, label="Group 1", color=:blue)
bar!(categories, values2, label="Group 2", color=:red)

# 定义分组条形图的数据
categories = ["A", "B", "C", "D"]
values1 = [10, 20, 30, 40]
values2 = [5, 15, 25, 35]

# 绘制分组条形图
groupedbar(categories, [values1, values2], label=["Group 1", "Group 2"], color=[:blue, :red])