[R] R help - Adding a column in a data frame with multiple conditions

Hi, I am trying to add a column of numbers to a data frame in R with multiple conditions. Here is a simplified example df: [A] [B] [C] [D] [E] [1] 1 X 90 88 [2] 1 Y 72 70 [3] 1 Z 67 41 [4] 2 X 74 49 [5] 2 Y 42 50 [6] 2 Z 81 56 [7] 3 X 92 59 [8] 3 Y 94 80 [9] 3 Z 80 82 I would like column [E]

Re: [R] R help - Adding a column in a data frame with multiple conditions

Hi Libby, You had an accumulation of small errors, from an extra ) to an unclear understanding of how indexing works in R. Also, you shouldn't call your dataframe df, or use square brackets in column names. That said, what about: sampledata - structure(list(A = c(1L, 1L, 1L, 2L, 2L, 2L, 3L,

Re: [R] R help - Adding a column in a data frame with multiple conditions

Gertken libb...@utexas.edu Cc: r-help@r-project.org Sent: Thursday, October 4, 2012 4:03 PM Subject: Re: [R] R help - Adding a column in a data frame with multiple conditions Hi Libby, You had an accumulation of small errors, from an extra ) to an unclear understanding of how indexing works in R