How to arrange values Between 0 and 1 in R?, The following techniques can be used in R to scale a variable’s values between 0 and 1:

Using the following data frame in R, the following examples demonstrate how to use each technique in practise:

Let’s create a data frame

df <- data.frame(store=c('A', 'B', 'C', 'D', 'E', 'F', 'G', 'H'),
                 sales=c(102, 124, 223, 359, 145, 134, 520, 177))

Now we can view the data frame

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df

   store sales
1     A   102
2     B   124
3     C   223
4     D   359
5     E   145
6     F   134
7     G   520
8     H   177

Example 1: Using Base R, Scale Values Between 0 and 1

The code that follows demonstrates how to create a new function in base R and then use it to scale the numbers in the data frame’s sales column to be between 0 and 1:

Scale values between 0 and 1 using the #define function.

scale_values <- function(x){(x-min(x))/(max(x)-min(x))}

Now we can use scale_values in ‘sales’ column to be between 0 and 1

df$sales <- scale_values(df$sales)

Now we can view the updated data frame

df

   store      sales
1     A 0.00000000
2     B 0.05263158
3     C 0.28947368
4     D 0.61483254
5     E 0.10287081
6     F 0.07655502
7     G 1.00000000
8     H 0.17942584

The sales column’s values are now scaled between 0 and 1.

This function scaled each of the values using the following formula:

Scaled value = (value – min value) / (max value – min value)

Example 2: Using the scales Package to Scale Values Between 0 and 1.

The numbers in the data frame’s sales column can be scaled to be between 0 and 1 by using the rescale() function from the scales package in R, as seen in the code below.

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library(scales)

Let’s scale values in ‘sales’ column to be between 0 and 1

df$sales <- rescale(df$sales)

Now we can view the updated data frame

df

    store      sales
1     A 0.00000000
2     B 0.05263158
3     C 0.28947368
4     D 0.61483254
5     E 0.10287081
6     F 0.07655502
7     G 1.00000000
8     H 0.17942584

The sales column’s values are now scaled between 0 and 1.

You’ll see that the scaled values correspond to those obtained using the standard R technique.

Recall that the to argument, which is accepted by the rescale() function, determines the scaled values’ range.

Instead, you could scale the values in the sales column to be between 0 and 100 using the syntax shown in the example below:

library(scales)

Now we can scale values in ‘sales’ column to be between 0 and 100

df$sales <- rescale(df$sales, to=c(0,100))
df

   store      sales
1     A   0.000000
2     B   5.263158
3     C  28.947368
4     D  61.483254
5     E  10.287081
6     F   7.655502
7     G 100.000000
8     H  17.942584

The sales column’s values are now all scaled between 0 and 100.

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