How to use sapply

You can use sapply() similar to how you used lapply(). The first argument of sapply() is the list or vector X over which you want to apply a function, FUN. Potential additional arguments to this function are specified afterwards (...):

sapply(X, FUN, ...)

In the next couple of exercises, you'll be working with the variable temp, that contains temperature measurements for 7 days. temp is a list of length 7, where each element is a vector of length 5, representing 5 measurements on a given day. This variable has already been defined in the workspace: type str(temp) to see its structure.

This exercise is part of the course

Intermediate R

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Exercise instructions

Use lapply() to calculate the minimum (built-in function min()) of the temperature measurements for every day.
Do the same thing but this time with sapply(). See how the output differs.
Use lapply() to compute the the maximum (max()) temperature for each day.
Again, use sapply() to solve the same question and see how lapply() and sapply() differ.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# temp has already been defined in the workspace

# Use lapply() to find each day's minimum temperature


# Use sapply() to find each day's minimum temperature


# Use lapply() to find each day's maximum temperature


# Use sapply() to find each day's maximum temperature

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