Writing the results of the for loop

Question

We were trying to write the results from a for loop. We tried to use write.table, as.data.frame and other solutions, but with no success. We expect to have a data frame.

Currently we have only the loop, that shows year and values from a matrix which are bigger than 50. Looks like that:

for (i in 1:nrow(dobowe1)) {
  if(dobowe1[i,4]>50) {
    cat(dobowe1[i,"rok"],dobowe1[i,4], "\n")
  }
}

Note: We don't do programming a lot, so it's hard to use other solutions from the questions that already beed asked.

[How to make a great R reproducible example?](http://stackoverflow.com/questions/5963269) — zx8754, Dec 21 '15 at 12:52

score 2 · Answer 1 · answered Dec 21 '15 at 12:50

2

Try to save each element to the vector, like here:

tabela <- numeric(nrow(dobowe1))
for (i in 1:nrow(dobowe1)) {
  if(dobowe1[i,4]>50) {
    tabela[i] <- paste(dobowe1[i,"rok"],dobowe1[i,4])
  }
}
as.data.frame(tabela)

answered Dec 21 '15 at 12:50

Marta

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score 0 · Answer 2 · answered Dec 21 '15 at 13:38

If you just want to visually inspect a subset of your matrix, you can just print out a filtered subset:

# create the filter:

> f <- dobowe1[,4] > 50

# use the filter to subset (index) your data.frame:

> dobowe1[f,c("rok", whatever-4th-var-is-called)]

This will automatically print it out. Or you can write it to a file with ?write.table

Writing the results of the for loop

2 Answers2