在 R 的 barplot() 中重新排序条形 [英] Re-ordering bars in R's barplot()
问题描述
我想要实现的与这里已经问过的完全相同(特别是使用 R 的基础图形,而不是像 ggplot
或 lattice
这样的包):
现在,我想根据 data$cat
重新排列条形图.按照我上面提到的链接,我尝试了接受的答案,但出现错误:
num2 <- factor(num, labels = as.character(cat))因子错误(num,labels = as.character(cat)):无效的标签";长度 10 应该是 1 或 9
然后我也在那里尝试了另一个答案:
num <- as.factor(num)条形图(表(数量))
但这是我得到的:
因此,在我的这个特殊情况下,与那个问题略有不同,我应该如何对条形图进行排序,以便条形图由 data$num
定义,但根据 data$num
进行排序代码>data$cat?
我得到以下内容,
num <- c(1, 8, 4, 3, 6, 7, 5, 2, 11, 3)cat <- c(字母[1:10])数据 <- data.frame(num, cat)条形图(数据[订单(数据[,1],递减=真),][,1],names.arg=数据[订单(数据[,1],递减=真),][,2])
上面的代码使用了 order() 函数两次(见下面的注释).为了避免这种情况,可以将有序 data.frame 的结果存储在新的 data.frame 中,这可用于生成条形图.
num <- c(1, 8, 4, 3, 6, 7, 5, 2, 11, 3)cat <- c(字母[1:10])数据 <- data.frame(num, cat)数据 2 <- 数据[顺序(数据[,1],递减=真),]barplot(data2[,1],names.arg=data2[,2])
What I want to achieve is exactly the same that was already asked here (and specifically using R's base graphics, not packages like ggplot
or lattice
): Ordering bars in barplot()
However, the solutions proposed there do not seem to work for me. What I need to is the following. Suppose I have this:
num <- c(1, 8, 4, 3, 6, 7, 5, 2, 11, 3)
cat <- c(letters[1:length(num)])
data <- data.frame(num, cat)
If I generate a barplot using barplot(data$num)
, here is what I get:
Now, I want to reorder the bars according to data$cat
. Following the link I mentioned above, I tried the accepted answer but got an error:
num2 <- factor(num, labels = as.character(cat))
Error in factor(num, labels = as.character(cat)) : invalid 'labels'; length 10 should be 1 or 9
Then I also tried the other answer there:
num <- as.factor(num)
barplot(table(num))
But here is what I got:
So, in this particular case of mine, which is slightly different from that question, how should I order the barplot so the bars are defined by data$num
but ordered according to data$cat
?
I get the following,
num <- c(1, 8, 4, 3, 6, 7, 5, 2, 11, 3)
cat <- c(letters[1:10])
data <- data.frame(num, cat)
barplot(data[order(data[,1],decreasing=TRUE),][,1],names.arg=data[order(data[,1],decreasing=TRUE),][,2])
The above code uses the order() function twice (see comments, below). To avoid doing this the results of the ordered data.frame can be stored in a new data.frame and this can be used to generate the barplot.
num <- c(1, 8, 4, 3, 6, 7, 5, 2, 11, 3)
cat <- c(letters[1:10])
data <- data.frame(num, cat)
data2 <- data[order(data[,1],decreasing=TRUE),]
barplot(data2[,1],names.arg=data2[,2])
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