[R] Function inside Sweave

[Silvano Cesar da Costa]

Hi,

I have a data set involving 25 Questions (Q1, Q2, ... , Q25), 100
Disciplina and 5 series. The variables are:

ALUNO DISCIPLINA SERIE TURMA Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 ... Q25


I want to create tables associating each of the 25 questions to the
Disciplina.
Something like:

tab1 = table(DISCIPLINA, Q1)
tab1.prop = round(100*prop.table(tab1, 1),  2)
tab1.txt = xtable(tab1.prop, align="l|rrrrr", label='Q1',
caption=c("Apresentação da proposta de programa a ser desenvolvida na
disciplina", "Q1"))
print(tab1.txt, format.args=list(big.mark = ".", decimal.mark = ","),
caption.placement='top', table.placement='H')



With the help of a friend, was created the following function:

require(xtable)

DISCIPLINA <- rep(c("A", "B", "C", "D", "E"), 5)
for (i in 1:25){
  aux <- paste("Q", i, sep="")
  assign(aux, sample(rep(seq(1:5),5)))
}

cria.tabela <- function(Questao){
  Questao1 <- get(Questao)
  tab1 <- table(DISCIPLINA, Questao1)
  tab1.prop = round(100*prop.table(tab1, 1),  2)
  tab1.txt = xtable(tab1.prop, align="l|rrrrr", label=Questao,
  caption=paste(Questao))
  print(tab1.txt, format.args=list(big.mark = ".", decimal.mark = ","),
  caption.placement='top', table.placement='H')
}

geral <- function(){
  for (i in 1:25){
    x<-paste("Q", i, sep="")
    cria.tabela(x)
    }
}

geral()


I need to change the variable DISCIPLINA created in the function by the
variable DISCIPLINA in my dataset, but not working.


Reading data was taken with:

require(foreign)
require(xtable)
dados = read.epiinfo('C:/Colegiado de Veterinária/Dados/A2013/A2013.rec')
head(dados)
tail(dados)
str(dados)
attach(dados)

serie_1 = subset(dados, SERIE=='1')
head(serie_1)
tail(serie_1)
attach(serie_1)


How can I do this?

Thanks a lot,


---------------------------------------------
Silvano Cesar da Costa

Universidade Estadual de Londrina
Centro de Ciências Exatas
Departamento de Estatística

Fone: (43) 3371-4346