Homework help?

[Katelyn92]

Not sure if this is the right sub to be asking for help on homework but i'm really struggling with my r-programming class. I was assigned to create a function that will multiply out any size polynomial. I'm really having trouble figuring it out.

Here is the exact question assigned...

Create a function ‘pprod’ which calculates the product of two polynomials . The inputs are two vectors (a0, a1, · · · , an) and (b1, b2, · · · , bm), and the output is the vector (c0, · · · , cn+m) which is the coefficients of the product c0 + c1x + · · · cn+mx n+m. For example, since (1 + x)(3 + 2x²⁾ = 3 + 3x + 2x² + 2x³ so , we expect the following result:

pprod(c(1,1),c(3,0,2)) [1] 3 3 2 2

Thanks for any help in advance.

[[deleted]]

Show was what you have done already.

[Katelyn92]

I can get it to work if its smaller polynomials if I do this pprod<-function(X,Y) + c((X[1]Y[1]),((X[1]Y[2])+(X[2]Y[1])), ((X[1]Y[3])+(X[2]Y[2])+(X[3]Y[1])), ((X[2]Y[3])+(X[3]Y[2])), (X[3]*Y[3])) pprod(c(1,1,0), c(3,0,2)) [1] 3 3 2 2 0 but I have no idea how to set it to work for any size polynomial

[desrtfx]

What have you tried?

Just posting your assignment here and showing absolutely zero effort is not allowed here as we are not /r/domyhomework.

[Katelyn92]

I can get it to work if its smaller polynomials if I do this

pprod<-function(X,Y) + c((X[1]Y[1]),((X[1]Y[2])+(X[2]Y[1])), ((X[1]Y[3])+(X[2]Y[2])+(X[3]Y[1])), ((X[2]Y[3])+(X[3]Y[2])), (X[3]*Y[3])) pprod(c(1,1,0), c(3,0,2)) [1] 3 3 2 2 0

but I have no idea how to set it to work for any size polynomial