list.all: Examine if a condition is true for all elements of a list; list.any: Examine if a condition is true for at least one list element; list.append: Append elements to a list; list.apply: Apply a function to each list element ('lapply') list.cases: Get all unique cases of a list field by expression; list.cbind: Bind all list elements by column. Count the number of elements that satisfy given condition. Usage list.count(.data, cond) Arguments.data: A list or vector. cond: A logical lambda expression for each element of .data to evaluate. If cond is missing then the total number of elements in .data will be returned. Value.

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The length () function gives count of number of elements in list and lengths () function gives count of number of elements in each component of list. The following methods show how you can do it with syntax. Method 1: Use length () Function. Method 2: Use lengths () Function.. In conclusion, counting the number of elements in a list in R can be accomplished in a variety of ways, depending on your specific needs. The length() function provides a simple method to count the number of top-level elements, while the unlist() function allows you to count all elements, including nested ones.