why nested If statement doesn't return data frame r?

Question

the nested if statement in this code is working very fine

x <- 4
if(x == 4){
  t <- x + 1
  if(t == 5){
   t + 2
 }
}
[1] 7

but when i try the same code on data frame there is no results.

mydata_one <- data.frame(words = c("hello", "everyone"))
mydata_two <- data.frame(words = c("my", "name"))
if(length(mydata_one$word) == 2){
  big_data <- rbind(mydata_one, mydata_two)
  if(length(big_data) > 3){
    big_data[1:3, 1]
   }
}

The expected value i am looking for:

[1] hello    everyone my

a data frame is just a special list. you haven't changed the # of columns so your (devoid of useful whitespace) if (length(big_data) > 3) { is still 1. — hrbrmstr
– hrbrmstr, Commented Oct 7, 2017 at 11:27

Miha · Accepted Answer · 2017-10-07 11:42:58Z

1

Length will not work with data frame. Use nrow instead to get number of records.

mydata_one <- data.frame(words = c("hello", "everyone"))
mydata_two <- data.frame(words = c("my", "name"))
if(length(mydata_one$word) == 2){
  big_data <- rbind(mydata_one, mydata_two)
  if(nrow(big_data) > 3){
    big_data[1:3, 1]
   }
}

Output: [1] hello everyone my
Levels: everyone hello my name

edited Oct 7, 2017 at 11:42

Miha

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answered Oct 7, 2017 at 11:41

Bhavesh Ghodasara

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