adding a column name in R-CodePudding

library(quantmod)
quote<-c("0883.HK","0386.HK","0857.HK")
df1<-data.frame(getQuote(quote)$Last)

Just download the last traded price for some stocks and put those quotes in a data frame, and then what I am trying to do here is to add column names for those quotes like below:

colnames(df1)<-c("883","386","857")

Error in names(x) <- value : 
  'names' attribute [3] must be the same length as the vector [1]

May I ask what have I done wrong here? Million thanks.

CodePudding user response：

The data you selected is one column with three observations. Therefore you cannot assign it three names as there is only one column

> df1
  getQuote.quote..Last
1                10.00
2                 3.74
3                 3.55

CodePudding user response：

When we apply as.data.frame or data.frame on a vector (after extracting the Last column), it will be a single column with that vector as values of the column. We may need to convert to list and then setting the column names will work

df1 <- as.data.frame.list(getQuote(quote)$Last)