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Using interpolating functions in Mathematica

  1. Feb 5, 2010 #1
    I have an interpolating function in mathematica and just want to find when it takes a certain value, seems simple, but I can't do it.

    i.e. I solved an equation numerically for z(rho) and got interpolating function x for z.

    Now I want to know for which value of rho, z(rho)=1 for example.

    Anyone know how?
  2. jcsd
  3. Feb 5, 2010 #2


    Staff: Mentor

    Use FindRoot
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