Hyperbolic Tan Fit












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I am trying to fit some data to a hyperbolic tan function of the following form:



$y=frac{1}{2}Big[(a+b)+(b-a)tanh{frac{x-t_0}{omega}}Big]$



where:



a = upper limit of range



b = lower limit of range



$t_0$ = inflection point



$omega$ = width? (not too sure)



I want the upper range to be $alpha$, so $a = alpha$, and also to reach this upper range when $x=0$, so $y=alpha, x = 0$.



I have found this is an impossible condition to meet, I am guessing because the function asymptotically approaches $alpha$, so it can't quite equal it.



Are there any tricks I can implement to get the result/conditions I want?










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    0












    $begingroup$


    I am trying to fit some data to a hyperbolic tan function of the following form:



    $y=frac{1}{2}Big[(a+b)+(b-a)tanh{frac{x-t_0}{omega}}Big]$



    where:



    a = upper limit of range



    b = lower limit of range



    $t_0$ = inflection point



    $omega$ = width? (not too sure)



    I want the upper range to be $alpha$, so $a = alpha$, and also to reach this upper range when $x=0$, so $y=alpha, x = 0$.



    I have found this is an impossible condition to meet, I am guessing because the function asymptotically approaches $alpha$, so it can't quite equal it.



    Are there any tricks I can implement to get the result/conditions I want?










    share|cite|improve this question











    $endgroup$















      0












      0








      0





      $begingroup$


      I am trying to fit some data to a hyperbolic tan function of the following form:



      $y=frac{1}{2}Big[(a+b)+(b-a)tanh{frac{x-t_0}{omega}}Big]$



      where:



      a = upper limit of range



      b = lower limit of range



      $t_0$ = inflection point



      $omega$ = width? (not too sure)



      I want the upper range to be $alpha$, so $a = alpha$, and also to reach this upper range when $x=0$, so $y=alpha, x = 0$.



      I have found this is an impossible condition to meet, I am guessing because the function asymptotically approaches $alpha$, so it can't quite equal it.



      Are there any tricks I can implement to get the result/conditions I want?










      share|cite|improve this question











      $endgroup$




      I am trying to fit some data to a hyperbolic tan function of the following form:



      $y=frac{1}{2}Big[(a+b)+(b-a)tanh{frac{x-t_0}{omega}}Big]$



      where:



      a = upper limit of range



      b = lower limit of range



      $t_0$ = inflection point



      $omega$ = width? (not too sure)



      I want the upper range to be $alpha$, so $a = alpha$, and also to reach this upper range when $x=0$, so $y=alpha, x = 0$.



      I have found this is an impossible condition to meet, I am guessing because the function asymptotically approaches $alpha$, so it can't quite equal it.



      Are there any tricks I can implement to get the result/conditions I want?







      algebra-precalculus functions






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      share|cite|improve this question













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      share|cite|improve this question








      edited Jan 25 at 20:26









      KReiser

      9,87121435




      9,87121435










      asked Jan 25 at 19:55









      ScientizedScientized

      20118




      20118






















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