What is mapply in R?
This recipe explains what is mapply in R
Recipe Objective
What is mapply in R? mapply () function is a multivariate type of sapply () function i.e mapply () accepts multiple arguments at a time. Syntax — **mapply (function,list)** function — a function like sum, etc is passed list — list of numbers on which the function will be applied This recipe demonstrates an example on mapply function..
Step 1 - Create a vector
a <- mapply(sum,1:10,1:10) # mapply sums up all the first elements, then second elements, and so on till the tenth elements.
print(a)
"Output is ": 2 4 6 8 10 12 14 16 18 20
a <- mapply(rep,1:10,10:1) # mapply repeats the first element 10 times, second element 9 times till the last element one time.
print(a)
"Output is ": [[1]] [1] 1 1 1 1 1 1 1 1 1 1 [[2]] [1] 2 2 2 2 2 2 2 2 2 [[3]] [1] 3 3 3 3 3 3 3 3 [[4]] [1] 4 4 4 4 4 4 4 [[5]] [1] 5 5 5 5 5 5 [[6]] [1] 6 6 6 6 6 [[7]] [1] 7 7 7 7 [[8]] [1] 8 8 8 [[9]] [1] 9 9 [[10]] [1] 10
What Users are saying..
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ETL (Abintio) developer at IBM
I come from a background in Marketing and Analytics and when I developed an interest in Machine Learning algorithms, I did multiple in-class courses from reputed institutions though I got good... Read More
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