如何从dataframe创建条形图

我无法使用以下数据帧创建条形图

                    Age     Male.Average   Female.Average
   ---------------------------------------------------------    
1:       0-19 Childhood     20.29543       18.14773
2:    20-39 Young Adult     22.35352       22.41548
3: 40-64 Mid Aged Adult     23.75663       23.64908
4:     65-84 Senior Age     21.45002       21.71446
5:   85+ Old Senior Age     21.72200       21.31565

我想在旁边创建分组条形图，如x=年龄，y=男性.average，女性.average。它给出了错误：

条形图中出现错误。默认值（d）：“高度”必须是向量或矩阵

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假设我们有一个

data.frame

barplot(`colnames<-`(t(df1[-1]), df1[,1]), beside=TRUE, 
    legend.text = TRUE, col = c("red", "green"), 
    args.legend = list(x = "topleft", bty = "n", inset=c(-0.05, 0)))

barplot（`colnames