how to separate the variables of an equation?

9 views (last 30 days)
Hi there
Please do anyone know how to separate the variables of an equation. for example we have f(x,y)=g(x,y) and we want it as y=h(x) .
Many thanks

Accepted Answer

Walter Roberson
Walter Roberson on 5 Jan 2012
That cannot be done in the equation form you specify.
For example, let f(x,y) = x^2 + y^3 . Then for any one x there are an infinite number of corresponding y that are valid.
If you are given a particular f(x,y) value, say P, you could try
syms x y
solve( P - g(x,y), y)
However, this will not always be able to find a solution, and when it is able to analyze, there may be multiple solutions.
Walter Roberson
Walter Roberson on 5 Jan 2012
Then both those solutions are valid.
For example, y^2 = x has two solutions, y = sqrt(x) and y = -sqrt(x) . Nothing you can do about it: y simply cannot always be isolated uniquely.

Sign in to comment.

More Answers (1)

Basil Abdelrahim
Basil Abdelrahim on 18 Oct 2016
Hi everyone
does any one have idea how can I spreat the male from the female in-order to transfer it from excel to matlab because its mix like that ??
male female female male
  1 Comment
Walter Roberson
Walter Roberson on 18 Oct 2016
Is the order always the same? That in every group of 4 it goes male, female, female, male? Or is there a variable that has the information about which entry is which?

Sign in to comment.


Find more on Mathematics in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by