How to find the percentage of values that lie within a range in column of a data.table object in R?

To find the percentage of values that lie within a range in column of a data.table object in R, we can follow the below steps −

• First of all, create a data.table object.

• Then, use sum function along with extreme values for range and length function to find the percentage of values that lie within that range.

Example

Create the data.table object

Let’s create a data.table object as shown below −

library(data.table)
x<-rnorm(30)
DT<-data.table(x)
DT

Output

On executing, the above script generates the below output(this output will vary on your system due to randomization) −

         x
1:  -0.01820109
2:   0.09807795
3:   0.87645348
4:   0.22873684
5:   0.48448009
6:   0.13104149
7:  -0.58816453
8:  -0.06087622
9:   0.19032472
10: -0.39708670
11:  0.56044501
12: -1.42750377
13: -0.76757968
14: -0.85976410
15: -0.45661539
16: -0.12494892
17: -0.02593251
18:  0.64340403
19:  0.66718194
20: -0.93805129
21: -0.27078554
22:  0.91980427
23:  1.48243157
24: -0.52458819
25:  0.73368864
26:  0.11948186
27: -0.67115652
28: -0.70762527
29: -0.26249638
30: -0.22123573
        x

Find the percentage of values that lie within a range

Using sum function along with the range that is 0.5 and 0.9 and length function to find the percentage of values that lie within this range −

library(data.table)
x<-rnorm(30)
DT<-data.table(x)
sum(DT$x>0.5 & DT$x<0.9)/length(DT$x)

Output

[1] 0.1666667