我有一些数据的子集（如下所示）。现在由于某种原因，我不能以任何方式改变data.frame。
我收到错误消息：
错误：data_frames只能包含1d原子矢量和列表
这应该源于我没有返回一个list或data.frame本身的对象类，但我甚至无法做出明显返回numeric值的突变。
数据
> FValuation.head
conm firm.value isin fyear Industry Total.PMG Exchange Industry.Classification List Short.Name Feb.Price Current.Price
1 2E GROUP 15.2460627 SE0000680902 2015f Other service 0.62 STO Consumer Services First North Premier 2E 12.75 12.95
2 A-COM AB NA SE0000592677 2015f Other service 0.62 <NA> <NA> <NA> <NA> NA NA
3 AAK AB 423.2503370 SE0001493776 2015f Other production 0.31 STO Consumer Goods LARGE AAK 430.00 425.00
4 AB SAGAX NA SE0001629288 2015f Real estate 0.56 STO Financials MID SAGA PREF NA NA
5 ABELCO AB 0.3730399 SE0003617075 2015f Other production 0.31 STO <NA> AktieTorget ABE 1.69 2.00
6 ACADEMEDIA AB NA SE0007897079 2015f Other service 0.62 <NA> <NA> <NA> <NA> NA NA
> str(FValuation.head)
'data.frame': 6 obs. of 12 variables:
$ conm : chr "2E GROUP" "A-COM AB" "AAK AB" "AB SAGAX" ...
$ firm.value : num 15.246 NA 423.25 NA 0.373 ...
$ isin : chr "SE0000680902" "SE0000592677" "SE0001493776" "SE0001629288" ...
$ fyear : chr "2015f" "2015f" "2015f" "2015f" ...
$ Industry : Factor w/ 16 levels "Building and construction",..: 11 11 10 14 10 11
$ Total.PMG : num 0.62 0.62 0.31 0.56 0.31 0.62
$ Exchange : Factor w/ 5 levels "","CPH","HEL",..: 5 NA 5 5 5 NA
$ Industry.Classification: Factor w/ 11 levels "","Basic Materials",..: 4 NA 3 5 NA NA
$ List : Factor w/ 7 levels ""," ","AktieTorget",..: 4 NA 5 6 3 NA
$ Short.Name : Factor w/ 1058 levels "","203","2E",..: 3 NA 6 805 9 NA
$ Feb.Price : num [1:6, 1] 12.75 NA 430 NA 1.69 ...
$ Current.Price : num [1:6, 1] 12.9 NA 425 NA 2 ...
> FValuation.summary <- FValuation.head %>% mutate(Buy.Sell.Signal = derivedFactor(
+ "NA" = (is.na(firm.value) == TRUE | is.na(Feb.Price) == TRUE),
+ "sell" = (firm.value < Feb.Price),
+ "buy" = (firm.value > Feb.Price),
+ .method = 'first'))
Error: data_frames can only contain 1d atomic vectors and lists
> FValuation.head %>% mutate(test = firm.value * 2)
Error: data_frames can only contain 1d atomic vectors and lists
可能有什么不对？这怎么解决？
> dput(droplevels(FValuation.head))
structure(list(conm = c("2E GROUP", "A-COM AB", "AAK AB", "AB SAGAX",
"ABELCO AB", "ACADEMEDIA AB"), firm.value = c(15.2460627037116,
NA, 423.25033702408, NA, 0.373039901083465, NA), isin = c("SE0000680902",
"SE0000592677", "SE0001493776", "SE0001629288", "SE0003617075",
"SE0007897079"), fyear = c("2015f", "2015f", "2015f", "2015f",
"2015f", "2015f"), Industry = structure(c(2L, 2L, 1L, 3L, 1L,
2L), .Label = c("Other production", "Other service", "Real estate"
), class = "factor"), Total.PMG = c(0.62, 0.62, 0.31, 0.56, 0.31,
0.62), Exchange = structure(c(1L, NA, 1L, 1L, 1L, NA), .Label = "STO", class = "factor"),
Industry.Classification = structure(c(2L, NA, 1L, 3L, NA,
NA), .Label = c("Consumer Goods", "Consumer Services", "Financials"
), class = "factor"), List = structure(c(2L, NA, 3L, 4L,
1L, NA), .Label = c("AktieTorget", "First North Premier",
"LARGE", "MID"), class = "factor"), Short.Name = structure(c(1L,
NA, 2L, 4L, 3L, NA), .Label = c("2E", "AAK", "ABE", "SAGA PREF"
), class = "factor"), Feb.Price = structure(c(12.75, NA,
430, NA, 1.69, NA), .Dim = c(6L, 1L)), Current.Price = structure(c(12.95,
NA, 425, NA, 2, NA), .Dim = c(6L, 1L))), .Names = c("conm",
"firm.value", "isin", "fyear", "Industry", "Total.PMG", "Exchange",
"Industry.Classification", "List", "Short.Name", "Feb.Price",
"Current.Price"), row.names = c(NA, 6L), class = "data.frame")
答案 0 :(得分：3)
由于数据框的最后2列包含矩阵，即它有2个维度，请参阅：
class(FValuation.head$Feb.Price)
如果你删除（或转换为数字）最后2列，它应该工作：
FValuation.head[, 1:10] %>%
mutate(test = firm.value * 2)
str(FValuation.head$Feb.Price)将显示它有6行1列。
$ Feb.Price : num [1:6, 1]