Community Tip - You can Bookmark boards, posts or articles that you'd like to access again easily! X
It seems simple, but for some reason (probably the normal one, lack of math chops) I'm having trouble with this datafit problem...
...Larry
Solved! Go to Solution.
Larry Baxter wrote:
Thanks, Fred,
Help me follow what you've done. How does Ssk work? A symbolic solution must input only Sk, it can't use k
because the function that corrects the error gets only Sk as an input. Aren't you using k in your solve statement?
I think I may have a solution when I can graph a correction factor vs. Sk and match my error term K*Pk^2.
...Confused
Some of my terminology was confusing. See if the attached is any easier to understand.
Fred
If you know that the relationship between S and P is of the form S = P - K*P^2 you can treat this as a quadratic equation in P and solve for P. One of the two solutions will give you the function conatining S and K that you need.
Alan
Thanks, Alan,
This doesn't seem to work, I don't know exactly why. We're not exactly solving a quadratic (and when you" solve a quadratic", don't you have an equation with one variable?) we're correcting its effect. Fred's post looks like it may work, if I could only understand it, but Fred's post seems to use k in its solution and we can''t use k (we don't know it), just Sk.
I think I will have a solution when I can graph a correction factor vs. Sk and match my error term K*Pk^2...
...L
Thanks, Fred,
Help me follow what you've done. How does Ssk work? A symbolic solution must input only Sk, it can't use k
because the function that corrects the error gets only Sk as an input. Aren't you using k in your solve statement?
I think I may have a solution when I can graph a correction factor vs. Sk and match my error term K*Pk^2.
...Confused
Larry Baxter wrote:
Thanks, Fred,
Help me follow what you've done. How does Ssk work? A symbolic solution must input only Sk, it can't use k
because the function that corrects the error gets only Sk as an input. Aren't you using k in your solve statement?
I think I may have a solution when I can graph a correction factor vs. Sk and match my error term K*Pk^2.
...Confused
Some of my terminology was confusing. See if the attached is any easier to understand.
Fred
AHA!
I got it now. Thanks!
...L