Use of 'fzero' or 'fsolve' for function files which have two input variable?

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Shishir Jaiswal
Shishir Jaiswal on 3 May 2013
Hi,
I have two function files: funpvsol(t,x) and funhsol(t,x) which gives the value of pressure and enthalpy respectively. These function files are based on nonlinear equations.
Now i have situation where I already know the pressure and enthalpy and have to calculate value of 't' and 'x', which are input to both the function files. So basically it is a problem of two nonlinear equations with two unknowns. In mathematical form:
P=f(t,x)........Eq.1 and h=f(t,x)........Eq.2 I know the value of 'P' and 'h'.
Can i use any of the matlab inbuilt functions such as 'fsolve' or 'fzero' to handle this situation?
P.S. i can not differentiate the equations as they have large no. of constants and have a series solution.
Thanks.

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