- **General Math**
(*http://www.physicsforums.com/forumdisplay.php?f=73*)

- - **Finding X and Y with respect to third variable if having two sets of X and Y**
(*http://www.physicsforums.com/showthread.php?t=578464*)

Finding X and Y with respect to third variable if having two sets of X and YMy problem
At temperature 5 degrees the Y=1.00228594 for X=435 and Y=1.000986038 for X=449 and Y=0.999760292 for X=463 At temperature 7 degrees the Y=1.002094781 for X=435 and Y=1.00079709 for X=449 and Y=0.999573015 for X =463 For a new temperature of 9.6 degrees how to find the Y values for different X values I find a polynomial eqn for the first set of X and Y values , then I find a polynomial eqn for the second set of X and Y values in excel. How can i find a polynomial for a different temp in excel help me out Thanks |

Re: Finding X and Y with respect to third variable if having two sets of X and YI am not sure I follow when you say you find a polynomial for the first set...
What's Y? What's X? Are they independent from each other? Is temperature the only independent variable? I think all you need to do is find a curve fit for Y alone based on T, and then you find a curve fit for X based on T; then, you will have two curves, functions Y(T) and X(T). So, just because you name Y Y and X X does not mean they should be your X,Y coordinates. So, maybe you need to think of your Y as Y1 and your X as Y2 and your T as X and so you will have Y1(X) and Y2(X) does this help? |

All times are GMT -5. The time now is 11:20 PM. |

Powered by vBulletin Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.

© 2014 Physics Forums