开发者_JS百科This question already has answers here: How to join (merge) data frames (inner, outer, left, right)
Here is a sample: > tmp labelvalue1开发者_JS百科value2 1aa_x_xxxxx 2bc_x_xxxxx 3aa_x_xxxxx 4bc_x_xxxxx
I am working with some US govt data which has a lengthy list of cities and zip codes. After some work, the data is in the following format.
I see that when Hadley Wickam prints data frame here, the values which dont change row over row dont get printed.
I printed out the summary of a column variables as such: Please see below the summary table printed out from R:
Let\'s say I have the following data frame. dat <- data.frame(city=c(\"Chelsea\",\"Brent\",\"Bremen\",\"Olathe\",\"Lenexa\",\"Shawnee\"),
Define df<-read.table(textConnection(\'egg 1 20 a egg 2 30 a jap 3 50 b jap 1 60 b\')) s.t. > df V1 V2 V3 V4
I have a input dataframe like this (the real one is very large, so I want to do it faster): df1 <- data.frame(A=c(1:5), B=c(5:9), C=c(9:13))
I\'m fairly new to R and have been trying to get my head around the more elegant ways to use the many vector based functions available. Many of the other answers offer part of a solution but I can\'t
I have a data.frame with one id column (x below), and a number of variables (y1,y2 below). x y1 y2 11 43 55
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