Solve one variable equation in Interval

Hello,

I have an equation like :

error = Tem - 1/x * Tshaft

Here the Tem is input experimental data and Tshaft is computed data. The x represents a efficiency. I would like to find a efficiency to minimize my error. Because the effciency varies in the interval [0 1] fsolve is not applicable ( right ? ). I tried to use fzero and solve but didn´t get statisfying solutions. Are there any other solve commands I could possibly use ?

Thanks already

Answer 1

[Torsten]

x = (Tem.'*Tem)/(Tem.'*Tshaft)

where Tem, Tshaft are column vectors of the same length.