How to find the Item with Minimum Number of Occurrences in a Vector in R - Step by Step Examples

How to find the Item with Minimum Number of Occurrences in a Vector in R ?

Answer

To find the item with the minimum number of occurrences in a Vector in R, you can use the table function to count the occurrences of each item and then find the item with the minimum count.


✐ Examples

1 Find Item with Minimum Occurrences in a Vector of Strings

In this example,

  1. We start by creating a vector named vec containing several string elements.
  2. We use the table function to count the occurrences of each string in the vector. This function creates a table of counts for each unique item in the vector.
  3. We convert the table to a data frame using the as.data.frame function for easier manipulation.
  4. We find the minimum count using the min function on the Freq column of the data frame.
  5. We subset the data frame to get the item(s) with the minimum count by comparing the Freq column to the minimum count found in the previous step.
  6. Finally, we print the item(s) with the minimum occurrences to standard output using the print function.

R Program

vec <- c('apple', 'banana', 'apple', 'orange', 'banana', 'apple', 'kiwi')

# Step 2: Create a table of counts
count_table <- table(vec)

# Step 3: Convert the table to a data frame
count_df <- as.data.frame(count_table)

# Step 4: Find the minimum count
min_count <- min(count_df$Freq)

# Step 5: Subset the data frame to get the item(s) with the minimum count
min_items <- count_df[count_df$Freq == min_count, ]

# Step 6: Print the item(s) with the minimum occurrences
print(min_items)

Output

    vec Freq
4  kiwi    1
3 orange    1

2 Find Item with Minimum Occurrences in a Vector of Integers

In this example,

  1. We start by creating a vector named vec containing several integer elements.
  2. We use the table function to count the occurrences of each integer in the vector. This function creates a table of counts for each unique item in the vector.
  3. We convert the table to a data frame using the as.data.frame function for easier manipulation.
  4. We find the minimum count using the min function on the Freq column of the data frame.
  5. We subset the data frame to get the item(s) with the minimum count by comparing the Freq column to the minimum count found in the previous step.
  6. Finally, we print the item(s) with the minimum occurrences to standard output using the print function.

R Program

vec <- c(1, 2, 3, 1, 2, 1, 4, 1, 5, 1)

# Step 2: Create a table of counts
count_table <- table(vec)

# Step 3: Convert the table to a data frame
count_df <- as.data.frame(count_table)

# Step 4: Find the minimum count
min_count <- min(count_df$Freq)

# Step 5: Subset the data frame to get the item(s) with the minimum count
min_items <- count_df[count_df$Freq == min_count, ]

# Step 6: Print the item(s) with the minimum occurrences
print(min_items)

Output

  vec Freq
3   3    1
4   4    1
5   5    1

Summary

In this tutorial, we learned How to find the Item with Minimum Number of Occurrences in a Vector in R language with well detailed examples.


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