Displaying 1 result from an estimated 1 matches for "sum_plan_a".
2010 Jun 26
1
All a column to a data frame with a specific condition
...apple','apple','pear','bread')
plan_b=c('bread','bread','orange','bread','bread','yogurt')
value=1:6
data=data.frame(plan_a,plan_b,value)
library(plyr)
library(reshape)
mm=melt(data, id=c('plan_a','plan_b'))
sum_plan_a=cast(mm,plan_a~variable,sum)
### I would like to add a new column to the data.frame named 'data', with
the same sum of value for the same type of plan_a
### The result should come up like this:
plan_a plan_b value sum_plan_a
1 apple bread 1 8
2 orange bread 2...