Count number of vector values in range with R

In this article, we will see how to count the number of vector values present in the given range in R. To achieve this functionality we can follow the following approach.

Approach

• Create vector
• Set range
• Iterate through the vector
• Check for elements that are within the range
• Add them
• Display sum

Implementation using this approach is given below.

Example 1:

R

# declaring a integer point vector
vec <- c(1,12,3,14,-1,-3)

# specifying the range to check the element in
min_range = -2
max_range = 8

# computing the size of the vector
size = length(vec)

# declaring sum =0 as the count of elements in range
sum = 0

# looping over the vector elements
for(i in 1:size)
 {

  # check if elements lies in the range provided
  if(vec[i]>=min_range && vec[i]<=max_range)

  # incrementing count of sum if condition satisfied
  sum =sum+1

 }

print ("Sum of elements in range : ")
print (sum)

Output

[1] “Sum of elements in range : “

[1] 3

Example 2:

R

# declaring a integer point vector
vec <- c(1,12,3,14,-1,-3,0.1)

# specifying the range to check the element in
min_range = -2
max_range = 8
print ("Sum of elements in specified range : ")

# and operator check if the element is less than
# max range and greater than min range
sum(vec>min_range & vec<max_range)

Output

[1] “Sum of elements in specified range : “

[1] 4

However, if any of the elements of the vector is NA, then sum() method returns NA as the output. It can be ignored by specifying na.rm=TRUE.

Example 3:

R

# declaring a integer point vector
vec <- c(1,12,3,14,NA,-3,0.1)

# specifying the range to check the element in
min_range = -2
max_range = 8
print ("Sum of elements in specified range without ignoring NA: ")

# and operator check if the element is less than
# max range and greater than min range
sum(vec>min_range & vec<max_range)

print ("Sum of elements in specified range ignoring NA: ")
sum(vec>min_range & vec<max_range,na.rm=TRUE)

Output

[1] “Sum of elements in specified range without ignoring NA: “

[1] NA

[1] “Sum of elements in specified range ignoring NA: “

[1] 3