Function Errors
No applicable method
Matches: no applicable method for '([^']+)'
WHAT THIS ERROR MEANS
You called a generic function on an object type it doesn't know how to handle. The function exists but has no implementation for your object's class.
HOW TO FIX IT
1. Check the object's class with class(your_object).
2. Convert to a supported type.
3. Check if the right package is loaded.
CODE EXAMPLES
BAD — THIS CAUSES THE ERROR
summary(Sys.time) # passing the function, not calling it
GOOD — CORRECT APPROACH
summary(Sys.time()) # call the function first
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