solving equation written in the functions

I want to solve three equations with three unknowns.

Force_x(x,y,z) == 0, Force_y(x,y,z) == 0, Force_z(x,y,z) == 0

vpasolve is not working here because Force_x works only when x y z are numbers, while vpasolve is passing symbols.

Help me with any other method or any modification.

my code:

[XX, YY] = vpasolve([Force_x(x,y,z)==0, Force_y(x,y,z)==0, Force_z(x,y,z)==0], [x, y, z], [0, 0, 0]);

error: Invalid arguments specified in evaluating the interpolant.

this error is due to symbols passed by Force_x.

[KSSV]

There should be some relation involving x,y,z right? Simply F_x = 0 ...will not work.

[Vijay Shankar Dwivedi]

Force_x(x,y,z) is a function defined in anothe file which involves x, y, z.

Answer 1

[Aman Vyas]

Hi,

You can try following code:

syms x y z Force_x Force_y Force_z
[X Y Z] = vpasolve([Force_x==0,Force_y==0,Force_z ==0],[x y z],[0 0 0])

This would start produce generic output as shown :

X =
 
Empty sym: 0-by-1
 
 
Y =
 
Empty sym: 0-by-1
 
 
Z =
 
Empty sym: 0-by-1
 

See this if it matches the requirement in output. Once you start calling function Force_x and other two then it should start outputting correct value.

Hope it helps !