Calculate the value of a polynomial in R

Question

I have a polynomial 'p' of degree 4.
How can I calculate the value of the polynomial 'p' forx = 1:10

require(polynom)  
p <- polynomial(coef = c(1:5))
p 
1 + 2x + 3x^2 + 4x^3 + 5x^4

+3

r

Si22 30 jul. '15 at 6:17

2 answers

jenesaisquoi · Answer 1 · 2015-07-30T06:24:06+0000

try it

as.function(p)(1:10)
# [1]    15   129   547  1593  3711  7465 13539 22737 35983 54321

whenever you want something to be something else in R, there might be a function as.

.

BonStats · Answer 2 · 2016-10-11T01:25:51+0000

The polyom package suggests using the function predict

:

predict(p, newdata = 1:10)
# [1]    15   129   547  1593  3711  7465 13539 22737 35983 54321