how to separate the variables of an equation?

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

OMAR MAAROOF

Answer 1

[Walter Roberson]

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.

[omar]

thanks for your answer

of course I have particular function, I tried the solve function and it done with two solutions.

[Walter Roberson]

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.

Answer 2

[Basil Abdelrahim]

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

[Walter Roberson]

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?