Hi,
You could specify the equation as a formula string, such as
10.0-1.0*(exp(2.0+x*15.0)-1)+(2.0+x*15.0)/20.0-x
where x is the unknown variable which **MUST NOT** be in captial letter. And, I suppose that
Iph = 10.0, Io = 1.0, V = 2.0, Rs = 1.5, Rp = 20.0
are known coefficients. You have to explicitly code those values in the formula string.
Starting from LabVIEW 2009, the Newton Raphson Zero Finder VI has a new instance for VI reference input. That is to say, you could create a VI to implement your function and pass the reference of that VI to the zero finder VI. Moreover, you can pass arbitrary values to your function VI. By using this way, it is able to solve the problem where you want to find zeros in a loop and the known coefficients are varied in each iteration.
