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#0162
Count Factor Levels in R
EasyR15 min10 XP
Problem
Given a factor vector of segments, return counts per segment.
Why This Matters
Factors are central to R data analysis, especially for categories, models, and plots.
Examples
Example 1
Inputfree, pro, free, team
Outputfree = 2, pro = 1, team = 1
table counts how many times each factor level appears.
Constraints
- Return the exact requested value.
- Handle empty or small inputs when the prompt allows them.
- Keep the code readable and deterministic.
CodeR
Visible browser tests run here when available.
Testcases1 visible / 3 hidden categories
Core example
Inputfree, pro, free, team
Expectedfree = 2, pro = 1, team = 1
table counts how many times each factor level appears.
Hidden Test Categories
empty or smallest inputduplicates or repeated valueslarger realistic input