Dear all,

I'm having a few problems trying to reshape a data frame. I tried with
reshape{stats} and melt{reshape} but I was missing something. Any help is
very welcome. Please find details below:

#################################
# data in its original shape:

indiv <- rep(c("A","B"),c(10,10))
level.1 <- rpois(20, lambda=3)
covar.1 <- rlnorm(20, 3, 1)
level.2 <- rpois(20, lambda=3)
covar.2 <- rlnorm(20, 3, 1)
my.dat <- data.frame(indiv,level.1,covar.1,level.2,covar.2)

# the values of level.1 and level.2 represent the number of cases for the
particular
# combination of indiv*level*covar value

# I would like to do two things:
# 1. reshape to long reducing my.dat[,2:5] into two colums "factor" (levels=
level.1 & level.2)
# and the covariate
# 2. create one new row for each case in level.1 and level.2

# the new reshaped data.frame would should look like this:

# indiv  factor    covar   case.id
#   A   level.1   4.614105    1
#   A   level.1   4.614105    2
#   A   level.2  31.064405    1
#   A   level.2  31.064405    2
#   A   level.2  31.064405    3
#   A   level.2  31.064405    4
#   A   level.1  19.185784    1
#   A   level.2  48.455929    1
#   A   level.2  48.455929    2
#   A   level.2  48.455929    3
# etc...

#############################

Thank you very much!!

Ahimsa


-- 
ahimsa campos-arceiz
www.camposarceiz.com

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