CODEWITHSUNDEEP
rvector
ujjwal tyagi
ujjwal tyagi

Reputation: 493

Convert any decimals in each column to integers

I have a dataset where each column might have some decimals which i wish to convert to integers.

structure(list(var1 = c(0.25, 1, 2), var2 = c(1, 2, 0.5)), row.names = c(NA, 
3L), class = "data.frame")

  var1 var2
1 0.25  1.0
2 1.00  2.0
3 2.00  0.5

I can multiply each column by a number to make them integers. Such as multiply first column by 4 and second by 2

structure(list(var1 = c(1, 4, 8), var2 = c(2, 4, 1)), row.names = c(NA, 
3L), class = "data.frame")
  var1 var2
1    1    2
2    4    4
3    8    1

I want to do this multiplication using code.

Upvotes: 1

Views: 78

Answers (1)

Kra.P
Kra.P

Reputation: 15123

For generalization, suppose that your numbers are can be expressed as pretty fractions, and using @MrFlick's lcm function for vector

library(pracma)
library(MASS)
library(stringr)
lcm_vector <- function(x) Reduce(Lcm, x)

for(i in 1:ncol(df)){
  x <- df[,i]
  x <- fractions(x[!(x %in% x[!x%%1])])
  y <- str_split(attr(x,"fracs"),"/", simplify = T)[,2]
  z <- lcm_vector(as.numeric(y))
  df[,i] <- z * df[,i]
}
df

  var1 var2
1    1    2
2    4    4
3    8    1

For another df,

df <- rbind(df, c(1/3, .75))
df
       var1 var2
1 0.2500000 1.00
2 1.0000000 2.00
3 2.0000000 0.50
4 0.3333333 0.75

applying code above will gives

  var1 var2
1    3    4
2   12    8
3   24    2
4    4    3

Upvotes: 2

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