Pascal triangle


#1

I have to write R code for creating pascal triangle. The code should such that if I enter, eg, i=400 , it should give me a pascal triangle for that.

Can anyone help me?


Pascal's Triangle
#2

This StackOverflow thread seems like it might be a useful fit! :slightly_smiling_face:


#3

thanks. can you also tell me, how to obtain row sum of each row in pascal triangle that is created. the sum should be 2^n.


#4

From the stackoverflow thred @mara linked to:

pascalTriangle <- function(h) {
  lapply(0:h, function(i) choose(i, 0:i))
}

The run:

p = pascalTriangle(4)
unlist(lapply(p, sum))
#[1]  1  2  4  8 16

and compare with

2**(0:4)
# [1]  1  2  4  8 16

#5

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