round all columns in R dataframe to 3 digits
To round all columns in an R dataframe to 3 digits, you can use the round()
function along with the apply()
function. Here are the steps to achieve this:
Step 1: Load the necessary libraries (if they are not already loaded). In this case, we'll need the dplyr
library.
Step 2: Create a dataframe or load an existing dataframe into R.
Step 3: Use the apply()
function to apply the round()
function to each column of the dataframe. Set the MARGIN
argument to 2 to indicate that the function should be applied to each column. Specify the number of digits to round to using the digits
argument of the round()
function.
Step 4: Assign the result back to the original dataframe or a new dataframe, depending on your requirements.
Here is an example code snippet that demonstrates these steps:
# Step 1: Load the necessary libraries
library(dplyr)
# Step 2: Create or load a dataframe
df <- data.frame(
col1 = c(1.23456, 2.34567, 3.45678),
col2 = c(4.56789, 5.67890, 6.78901)
)
# Step 3: Round each column to 3 digits
df <- apply(df, 2, function(x) round(x, digits = 3))
# Step 4: Assign the result back to the dataframe
df
This code will round each column in the dataframe df
to 3 digits. The resulting dataframe will contain the rounded values.