我在R中有一个数据框,我想使用reshape2库进行融合。有两个原因。
我想使用ggplot为条形图中的每个问题绘制每个用户的分数。
我想把这些数据放到Excel中,这样我就可以看到,每个用户,他们的情绪,得分,以及混合动机,态度,等等。我的意图是使用融化,然后施放数据到宽格式,便于Excel导入。
当我尝试运行熔化时,我收到一个警告,最终在我生成的熔融数据框中找到了NA。
Warning messages:
1: In `[<-.factor`(`*tmp*`, ri, value = c(0.148024, 0.244452, -0.00421, :
invalid factor level, NAs generated
2: In `[<-.factor`(`*tmp*`, ri, value = c(0L, 0L, 0L, 0L, 0L, 0L, 0L, :
invalid factor level, NAs generated
我最终在我的融合数据框中输入了大量的NA。我认为这是因为我在同一列中同时使用了字符和数字。
结果我有两个问题。
问题1:R中是否有解决方法?
问题2:我是否有更好的方法来构建数据以避免此问题?
这是我创建数据框的代码。
words <- data.frame(read.delim("sentiments-test-subset-no-text.txt", header=FALSE))
names(words) <- c("level", "question", "user", "sentiment", "score", "mixed")
words$user <- as.factor(words$user)
words.m <- melt(words, id.vars=c("user", "level"), measure.vars=c("sentiment", "score", "mixed"))
我很难重塑和融化,但我认为这就是我想要的最后一行。
人类可读格式的数据如下所示。
experimental motivated 1 positive 0.148024 0
experimental motivated 2 positive 0.244452 0
experimental motivated 3 negative -0.004210 0
experimental motivated 4 unknown 0.000000 0
experimental attitudeBefore 1 negative -0.241500 0
experimental attitudeBefore 2 neutral 0.000000 0
experimental attitudeBefore 3 neutral 0.000000 0
experimental attitudeBefore 4 unknown 0.000000 0
以下输入。
structure(list(level = structure(c(1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L), .Label = "experimental", class = "factor"), question = structure(c(2L,
2L, 2L, 2L, 1L, 1L, 1L, 1L), .Label = c("attitudeBefore", "motivated"
), class = "factor"), user = structure(c(1L, 2L, 3L, 4L, 1L,
2L, 3L, 4L), .Label = c("1", "2", "3", "4"), class = "factor"),
sentiment = structure(c(3L, 3L, 1L, 4L, 1L, 2L, 2L, 4L), .Label = c("negative",
"neutral", "positive", "unknown"), class = "factor"), score = c(0.148024,
0.244452, -0.00421, 0, -0.2415, 0, 0, 0), mixed = c(0L, 0L,
0L, 0L, 0L, 0L, 0L, 0L)), .Names = c("level", "question",
"user", "sentiment", "score", "mixed"), row.names = c(NA, -8L
), class = "data.frame")
答案 0 :(得分:4)
看起来您可能只是使用了错误的库。
reshape
和reshape2
不是一回事。
library(reshape2)
words.m <- melt(words, id.vars=c("user", "level"), measure.vars=c("sentiment", "score", "mixed"))
# no problem
detach(package:reshape2)
# using reshape instead of reshape2
library(reshape)
words.m <- melt(words, id.vars=c("user", "level"), measure.vars=c("sentiment", "score", "mixed"))
# Warning messages:
# 1: In `[<-.factor`(`*tmp*`, ri, value = c(3L, 3L, 1L, 4L, 1L, 2L, 2L, :
# invalid factor level, NAs generated
# 2: In `[<-.factor`(`*tmp*`, ri, value = c(3L, 3L, 1L, 4L, 1L, 2L, 2L, :
# invalid factor level, NAs generated
如果您的系统上没有reshape2
,则可以从CRAN安装
install.packages("reshape2")