Statistical programming, matrix languages, and more

Can I use proc IML to solve my problem? Please help...

Accepted Solution Solved
Reply
Occasional Contributor
Posts: 7
Accepted Solution

Can I use proc IML to solve my problem? Please help...

I am trying to solve the following...

W = pX

X is an i x 1 vector of known values (i is the number of observations in my sample)

p is a constant and is negative (it is unknown).

W is an i x1 vector of unknown values.

The sum of the values in W needs to equal zero. (w1 + w2 + w3 + ...+ wi = 0)

I am trying to solve for W.

I am not sure how to set up this problem so that I can solve for W.

Is this something that I can do using proc IML?

If so, can you please help show me how I can set it up.... I have been struggling with this all day and any help or advice is appreciated!


Accepted Solutions
Solution
‎03-30-2015 05:59 AM
SAS Super FREQ
Posts: 3,419

Re: Can I use proc IML to solve my problem? Please help...

If sum(X)=0, then you can choose any value for p.  If not, then there is no solution when p is nonzero.

View solution in original post


All Replies
Solution
‎03-30-2015 05:59 AM
SAS Super FREQ
Posts: 3,419

Re: Can I use proc IML to solve my problem? Please help...

If sum(X)=0, then you can choose any value for p.  If not, then there is no solution when p is nonzero.

Occasional Contributor
Posts: 7

Re: Can I use proc IML to solve my problem? Please help...

Thanks Rick,

You are correct.

I am a bit embarrassed!

I got so stuck on looking at how to code the conditions that I made it more complicated than it truly was.

The sum of X is such that it equals zero...

Thank you for help,

Jennifer

☑ This topic is SOLVED.

Need further help from the community? Please ask a new question.

Discussion stats
  • 2 replies
  • 324 views
  • 0 likes
  • 2 in conversation