Services & ResourcesWolfram ForumsMathGroup Archive

[Date Index] [Thread Index] [Author Index]

Exit a loop

• To: mathgroup at smc.vnet.net
• Subject: [mg122594] Exit a loop
• From: Mary R <mathematica023 at gmail.com>
• Date: Thu, 3 Nov 2011 03:43:00 -0500 (EST)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com

Hi to everyone,
i try to exit a loop when this criterion is satisfied:
If[( (matriceP[[i - 1, 1]] - matriceP[[i - 1, -1]])/matriceP[[i - 1, 1]])^2
< ( (matriceP[[i, 1]] - matriceP[[i, -1]])/matriceP[[i, 1]])^2
i try with Goto[thispoint]-Label[thispoint], and it works, but have this
error:
Goto::nolabel: Label thispoint not found.
I try again with Catch and Throw (as you can see in comment), but the
calculations goes on without stopping.
Have any idea?
The part of algoritm interesting is signed by (*THIS PART*) near the end of
the notebook.
Thanks in advance
M.
----------------------------------------------
Timing[indicek = 1;
 matriceP = {};
 valorek = {};
 differencep = {};
 mfugv1 = {{}};
 mfugl1 = {{}};
 mfugv2 = {{}};
 mfugl2 = {{}};
 my1 = {{}};
 my2 = {{}};
 vettore = {};
 Do[\[Omega] = {0.1521, 0.32684};
   x = {0.0991, 1 - 0.0991};
   Tc = {369.89, 374.21};
   Subscript[P, c] = {42.512, 40.593};
   R = 83.14;
   T = 273.15;
   tollerancep = 10^-8;
   tollerancey = 10^-8;
   incrP = 0.8;
   decremento = 0;
   incremento = 0;
   ris = {};
   passo = 1;
   label = {"step", "P", "\!\(\*SubscriptBox[\(y\), \(1  n\)]\)",
     "\!\(\*SubscriptBox[\(y\), \(2  n\)]\)",
     "\!\(\*SubscriptBox[\(f\), \(1  l\)]\)",
     "\!\(\*SubscriptBox[\(f\), \(2  l\)]\)",
     "\!\(\*SubscriptBox[\(f\), \(1  v\)]\)",
     "\!\(\*SubscriptBox[\(f\), \(2  v\)]\)", "\[CapitalDelta]"};
   Subscript[T, r] = Table[T/Tc[[i]], {i, 2}];
   alfa =
    Table[(1 + (0.37464 + 1.54226 \[Omega][[i]] -
          0.26993 (\[Omega][[i]])^2 ) (1 - Sqrt[
          Subscript[T, r][[i]]]))^2, {i, 2}];
   a = Table[(0.45723553 alfa[[i]]  R^2 (Tc^2)[[i]])/
      Subscript[P, c][[i]] , {i, 2}];
   b = Table[(0.07779607 R Tc[[i]] )/Subscript[P, c][[i]], {i, 2}];
   P = {2.8};
   Subscript[y, 1] = {0.3596};
   Subscript[y, 1 n] = {0.3596};
   Subscript[y, 2] = {1 - 0.3596};
   Subscript[y, 2 n] = {1 - 0.3596};
   numy = 1;
   nump = 1;
   Subscript[f, 1 l] = {};
   Subscript[f, 2 l] = {};
   Subscript[f, 1 v] = {};
   Subscript[f, 2 v] = {};
   A = Table[(a[[i]] P[[nump]])/(R^2 T^2), {i, 2}];
   B = Table[(b[[i]] P[[nump]])/(R T), {i, 2}];
   Subscript[A, 12] = Sqrt[A[[1]]*A[[2]]]*(1 - k);

   Subscript[A, liq] =
    x[[1]]^2 A[[1]] + 2*(x[[1]]*x[[2]])* Subscript[A, 12] +
     x[[2]]^2 A[[2]];
   Subscript[B, liq] = x[[1]]*B[[1]] + x[[2]]*B[[2]];
   solzl =
    NSolve[Z - 1/(1 - Subscript[B, liq]/Z) +
       Subscript[A, liq]/Subscript[B, liq]*Subscript[B, liq]/Z/(
        1 + 2 *Subscript[B, liq]/Z - (Subscript[B, liq]/Z)^2) == 0, Z];
   soll = Z /. {solzl[[1]], solzl[[3]]};
   Subscript[ln\[Phi], 1 l] =
    B[[1]]/Subscript[B, liq] (soll[[2]] - 1) -
     Log[soll[[2]] - Subscript[B, liq]] -
     Subscript[A, liq]/(Subscript[B, liq] Sqrt[8])
       Log[(soll[[2]] + (1 + Sqrt[2]) Subscript[B, liq])/(
       soll[[2]] + (1 - Sqrt[2]) Subscript[B, liq])] (1/Subscript[A,
         liq] 2 (x[[1]] A[[1]] + x[[2]] Subscript[A, 12]) - B[[1]]/
        Subscript[B, liq]);
   Subscript[ln\[Phi], 2 l] =
    B[[2]]/Subscript[B, liq] (soll[[2]] - 1) -
     Log[soll[[2]] - Subscript[B, liq]] -
     Subscript[A, liq]/(Subscript[B, liq] Sqrt[8])
       Log[(soll[[2]] + (1 + Sqrt[2]) Subscript[B, liq])/(
       soll[[2]] + (1 - Sqrt[2]) Subscript[B, liq])] (1/Subscript[A,
         liq] 2 (x[[1]] Subscript[A, 12] + x[[2]] A[[2]]) - B[[2]]/
        Subscript[B, liq]);
   Subscript[\[Phi], 1 l] = Exp[Subscript[ln\[Phi], 1 l]];
   Subscript[\[Phi], 2 l] = Exp[Subscript[ln\[Phi], 2 l]];
   Subscript[f, 1 l] =
    Append[Subscript[f, 1 l], Subscript[\[Phi], 1 l]*x[[1]]];
   Subscript[f, 2 l] =
    Append[Subscript[f, 2 l], Subscript[\[Phi], 2 l]*x[[2]]];
   Subscript[B, vap] =
    Subscript[y, 1][[numy]]*B[[1]] + Subscript[y, 2][[numy]]*B[[2]];
   Subscript[A, vap] =
    Subscript[y, 1][[numy]]^2 A[[1]] +
     2 Subscript[y, 1][[numy]] Subscript[y, 2][[numy]] Subscript[A,
      12] + Subscript[y, 2][[numy]]^2 A[[2]];
   solzv =
    NSolve[Z - 1/(1 - Subscript[B, vap]/Z) +
       Subscript[A, vap]/Subscript[B, vap]*Subscript[B, vap]/Z/(
        1 + 2 *Subscript[B, vap]/Z - (Subscript[B, vap]/Z)^2) == 0, Z];
   solv = Z /. {solzv[[1]], solzv[[3]]};
   Subscript[ln\[Phi], 1 v] =
    B[[1]]/Subscript[B, vap] (solv[[1]] - 1) -
     Log[solv[[1]] - Subscript[B, vap]] -
     Subscript[A, vap]/(Subscript[B, vap] Sqrt[8])
       Log[(solv[[1]] + (1 + Sqrt[2]) Subscript[B, vap])/(
       solv[[1]] + (1 - Sqrt[2]) Subscript[B, vap])] (1/Subscript[A,
         vap] 2 (Subscript[y, 1][[numy]] A[[1]] +
           Subscript[y, 2][[numy]] Subscript[A, 12]) - B[[1]]/
        Subscript[B, vap]);
   Subscript[ln\[Phi], 2 v] =
    B[[2]]/Subscript[B, vap] (solv[[1]] - 1) -
     Log[solv[[1]] - Subscript[B, vap]] -
     Subscript[A, vap]/(Subscript[B, vap] Sqrt[8])
       Log[(solv[[1]] + (1 + Sqrt[2]) Subscript[B, vap])/(
       solv[[1]] + (1 - Sqrt[2]) Subscript[B, vap])] (1/Subscript[A,
         vap] 2 (Subscript[y, 1][[numy]] Subscript[A, 12] +
           Subscript[y, 2][[numy]] A[[2]]) - B[[2]]/Subscript[B, vap]);
   Subscript[\[Phi], 1 v] = Exp[Subscript[ln\[Phi], 1 v]];
   Subscript[\[Phi], 2 v] = Exp[Subscript[ln\[Phi], 2 v]];
   Subscript[f, 1 v] =
    Append[Subscript[f, 1 v],
     Subscript[\[Phi], 1 v]*Subscript[y, 1][[numy]]];
   Subscript[f, 2 v] =
    Append[Subscript[f, 2 v],
     Subscript[\[Phi], 2 v]*Subscript[y, 2][[numy]]];

   While[Abs[Subscript[f, 1 l][[nump]] - Subscript[f, 1 v][[numy]]] +
      Abs[Subscript[f, 2 l][[nump]] - Subscript[f, 2 v][[numy]]] >
     tollerancep,
    numy = numy + 1;
    Subscript[k, 1] = Subscript[\[Phi], 1 l]/Subscript[\[Phi], 1 v];
    Subscript[k, 2] = Subscript[\[Phi], 2 l]/Subscript[\[Phi], 2 v];
    Subscript[y, 1] =
     Append[Subscript[y, 1], (x[[1]]*Subscript[k, 1])];
    Subscript[y, 2] =
     Append[Subscript[y, 2], (x[[2]]*Subscript[k, 2])];
    Subscript[y, 1 n] =
     Append[Subscript[y,
      1 n], (x[[1]]*Subscript[k, 1])/(x[[1]]*Subscript[k, 1] +
         x[[2]]*Subscript[k, 2])];
    Subscript[y, 2 n] =
     Append[Subscript[y,
      2 n], (x[[2]]*Subscript[k, 2])/(x[[1]]*Subscript[k, 1] +
         x[[2]]*Subscript[k, 2])];
    Subscript[B, vap] =
     Subscript[y, 1 n][[numy]]*B[[1]] +
      Subscript[y, 2 n][[numy]]*B[[2]];
    Subscript[A, vap] =
     Subscript[y, 1 n][[numy]]^2 A[[1]] +
      2 Subscript[y, 1 n][[numy]] Subscript[y, 2 n][[numy]] Subscript[
       A, 12] + Subscript[y, 2 n][[numy]]^2 A[[2]];
    solzv =
     NSolve[Z - 1/(1 - Subscript[B, vap]/Z) +
        Subscript[A, vap]/Subscript[B, vap]*Subscript[B, vap]/Z/(
         1 + 2 *Subscript[B, vap]/Z - (Subscript[B, vap]/Z)^2) == 0,
      Z];
    solv = Z /. {solzv[[1]], solzv[[3]]};
    Subscript[ln\[Phi], 1 v] =
     B[[1]]/Subscript[B, vap] (solv[[1]] - 1) -
      Log[solv[[1]] - Subscript[B, vap]] -
      Subscript[A, vap]/(Subscript[B, vap] Sqrt[8])
        Log[(solv[[1]] + (1 + Sqrt[2]) Subscript[B, vap])/(
        solv[[1]] + (1 - Sqrt[2]) Subscript[B, vap])] (1/Subscript[A,
          vap] 2 (Subscript[y, 1 n][[numy]] A[[1]] +
            Subscript[y, 2 n][[numy]] Subscript[A, 12]) - B[[1]]/
         Subscript[B, vap]);
    Subscript[ln\[Phi], 2 v] =
     B[[2]]/Subscript[B, vap] (solv[[1]] - 1) -
      Log[solv[[1]] - Subscript[B, vap]] -
      Subscript[A, vap]/(Subscript[B, vap] Sqrt[8])
        Log[(solv[[1]] + (1 + Sqrt[2]) Subscript[B, vap])/(
        solv[[1]] + (1 - Sqrt[2]) Subscript[B, vap])] (1/Subscript[A,
          vap] 2 (Subscript[y, 1 n][[numy]] Subscript[A, 12] +
            Subscript[y, 2 n][[numy]] A[[2]]) - B[[2]]/Subscript[B,
         vap]);
    Subscript[\[Phi], 1 v] = Exp[Subscript[ln\[Phi], 1 v]];
    Subscript[\[Phi], 2 v] = Exp[Subscript[ln\[Phi], 2 v]];
    Subscript[f, 1 v] =
     Append[Subscript[f, 1 v],
      Subscript[\[Phi], 1 v]*Subscript[y, 1 n][[numy]]];
    Subscript[f, 2 v] =
     Append[Subscript[f, 2 v],
      Subscript[\[Phi], 2 v]*Subscript[y, 2 n][[numy]]];
    Abs[Subscript[f, 1 v][[numy]] - Subscript[f, 1 v][[numy - 1]]] +
     Abs[Subscript[f, 2 v][[numy]] - Subscript[f, 2 v][[numy - 1]]];
    Abs[Subscript[f, 1 l][[nump]] - Subscript[f, 1 v][[numy]]] +
     Abs[Subscript[f, 2 l][[nump]] - Subscript[f, 2 v][[numy]]];
    While[
      Abs[Subscript[f, 1 v][[numy]] - Subscript[f, 1 v][[numy - 1]]] +
         Abs[Subscript[f, 2 v][[numy]] -
          Subscript[f, 2 v][[numy - 1]]] >
       tollerancey,(*inizio while su y*)
      numy = numy + 1;
      Subscript[k, 1] = Subscript[\[Phi], 1 l]/Subscript[\[Phi], 1 v];
      Subscript[k, 2] = Subscript[\[Phi], 2 l]/Subscript[\[Phi], 2 v];
      Subscript[y, 1] =
       Append[Subscript[y, 1], (x[[1]]*Subscript[k, 1])];
      Subscript[y, 2] =
       Append[Subscript[y, 2], (x[[2]]*Subscript[k, 2])];
      Subscript[y, 1 n] =
       Append[Subscript[y,
        1 n], (x[[1]]*Subscript[k, 1])/(x[[1]]*Subscript[k, 1] +
           x[[2]]*Subscript[k, 2])];
      Subscript[y, 2 n] =
       Append[Subscript[y,
        2 n], (x[[2]]*Subscript[k, 2])/(x[[1]]*Subscript[k, 1] +
           x[[2]]*Subscript[k, 2])];
      Subscript[B, vap] =
       Subscript[y, 1 n][[numy]]*B[[1]] +
        Subscript[y, 2 n][[numy]]*B[[2]];
      Subscript[A, vap] =
       Subscript[y, 1 n][[numy]]^2 A[[1]] +
        2 Subscript[y, 1 n][[numy]] Subscript[y, 2 n][[
          numy]] Subscript[A, 12] + Subscript[y, 2 n][[numy]]^2 A[[2]];
      solzv =
       NSolve[Z - 1/(1 - Subscript[B, vap]/Z) +
          Subscript[A, vap]/Subscript[B, vap]*Subscript[B, vap]/Z/(
           1 + 2 *Subscript[B, vap]/Z - (Subscript[B, vap]/Z)^2) == 0,
         Z];
      solv = Z /. {solzv[[1]], solzv[[3]]};
      Subscript[ln\[Phi], 1 v] =
       B[[1]]/Subscript[B, vap] (solv[[1]] - 1) -
        Log[solv[[1]] - Subscript[B, vap]] -
        Subscript[A, vap]/(Subscript[B, vap] Sqrt[8])
          Log[(solv[[1]] + (1 + Sqrt[2]) Subscript[B, vap])/(solv[[
              1]] + (1 - Sqrt[2]) Subscript[B, vap])] (1/Subscript[A,
            vap] 2 (Subscript[y, 1][[numy]] A[[1]] +
              Subscript[y, 2][[numy]] Subscript[A, 12]) - B[[1]]/
           Subscript[B, vap]);
      Subscript[ln\[Phi], 2 v] =
       B[[2]]/Subscript[B, vap] (solv[[1]] - 1) -
        Log[solv[[1]] - Subscript[B, vap]] -
        Subscript[A, vap]/(Subscript[B, vap] Sqrt[8])
          Log[(solv[[1]] + (1 + Sqrt[2]) Subscript[B, vap])/(solv[[
              1]] + (1 - Sqrt[2]) Subscript[B, vap])] (1/Subscript[A,
            vap] 2 (Subscript[y, 1][[numy]] Subscript[A, 12] +
              Subscript[y, 2][[numy]] A[[2]]) - B[[2]]/Subscript[B,
           vap]);
      Subscript[\[Phi], 1 v] = Exp[Subscript[ln\[Phi], 1 v]];
      Subscript[\[Phi], 2 v] = Exp[Subscript[ln\[Phi], 2 v]];
      Subscript[f, 1 v] =
       Append[Subscript[f, 1 v],
        Subscript[\[Phi], 1 v]*Subscript[y, 1 n][[numy]]];
      Subscript[f, 2 v] =
       Append[Subscript[f, 2 v],
        Subscript[\[Phi], 2 v]*Subscript[y, 2 n][[numy]]];]
     If
      [Abs[Subscript[f, 1 l][[nump]] - Subscript[f, 1 v][[numy]]] +
        Abs[Subscript[f, 2 l][[nump]] - Subscript[f, 2 v][[numy]]] >
       tollerancep,

      ris =
       Append[{ris},
         Join[{P[[nump]]}, {Subscript[y, 1 n]}, {Subscript[y,
           2 n]}, {Subscript[f, 1 l][[nump]]}, {Subscript[f, 2 l][[
            nump]]}, {Subscript[f, 1 v]}, {Subscript[f,
           2 v]}, {Abs[
             Subscript[f, 1 l][[nump]] - Subscript[f, 1 v][[numy]]] +
            Abs[Subscript[f, 2 l][[nump]] -
              Subscript[f, 2 v][[numy]]]}]] // MatrixForm;
      If
       [
       Abs[P[[nump - 2]] - P[[nump - 1]]] ==
        Abs[P[[nump - 1]] - P[[nump]]],
       incrP = incrP/2;

       incrP
       ];

      nump = nump + 1;
      P =
       Append[P,
        If[Subscript[y, 1][[numy]] + Subscript[y, 2][[numy]] > 1,
         P[[nump - 1]] + incrP, P[[nump - 1]] - incrP]];
      A = Table[(a[[i]] P[[nump]])/(R^2 T^2), {i, 2}];
      B = Table[(b[[i]] P[[nump]])/(R T), {i, 2}];
      Subscript[A, 12] = Sqrt[A[[1]]*A[[2]]]*(1 - k);
      Subscript[A, liq] =
       x[[1]]^2 A[[1]] + 2*(x[[1]]*x[[2]])* Subscript[A, 12] +
        x[[2]]^2 A[[2]];
      Subscript[B, liq] = x[[1]]*B[[1]] + x[[2]]*B[[2]];
      solzl =
       NSolve[Z - 1/(1 - Subscript[B, liq]/Z) +
          Subscript[A, liq]/Subscript[B, liq]*Subscript[B, liq]/Z/(
           1 + 2 *Subscript[B, liq]/Z - (Subscript[B, liq]/Z)^2) == 0,
         Z];
      soll = Z /. {solzl[[1]], solzl[[3]]};
      Subscript[ln\[Phi], 1 l] =
       B[[1]]/Subscript[B, liq] (soll[[2]] - 1) -
        Log[soll[[2]] - Subscript[B, liq]] -
        Subscript[A, liq]/(Subscript[B, liq] Sqrt[8])
          Log[(soll[[2]] + (1 + Sqrt[2]) Subscript[B, liq])/(soll[[
              2]] + (1 - Sqrt[2]) Subscript[B, liq])] (1/Subscript[A,
            liq] 2 (x[[1]] A[[1]] + x[[2]] Subscript[A, 12]) - B[[1]]/
           Subscript[B, liq]);
      Subscript[ln\[Phi], 2 l] =
       B[[2]]/Subscript[B, liq] (soll[[2]] - 1) -
        Log[soll[[2]] - Subscript[B, liq]] -
        Subscript[A, liq]/(Subscript[B, liq] Sqrt[8])
          Log[(soll[[2]] + (1 + Sqrt[2]) Subscript[B, liq])/(soll[[
              2]] + (1 - Sqrt[2]) Subscript[B, liq])] (1/Subscript[A,
            liq] 2 (x[[1]] Subscript[A, 12] + x[[2]] A[[2]]) - B[[2]]/
           Subscript[B, liq]);
      Subscript[\[Phi], 1 l] = Exp[Subscript[ln\[Phi], 1 l]];
      Subscript[\[Phi], 2 l] = Exp[Subscript[ln\[Phi], 2 l]];
      Subscript[f, 1 l] =
       Append[Subscript[f, 1 l], Subscript[\[Phi], 1 l]*x[[1]]];
      Subscript[f, 2 l] =
       Append[Subscript[f, 2 l], Subscript[\[Phi], 2 l]*x[[2]]];
      Subscript[y, 1 n] = {Subscript[y, 1 n][[numy]]};
      Subscript[y, 2 n] = {Subscript[y, 2 n][[numy]]};
      Subscript[y, 1] = {Subscript[y, 1][[numy]]};
      Subscript[y, 2] = {Subscript[y, 2][[numy]]};
      Subscript[f, 1 v] = {Subscript[f, 1 v][[numy]]};
      Subscript[f, 2 v] = {Subscript[f, 2 v][[numy]]};
      numy = 1;
      passo = passo + 1;
      ]
    ];
   matriceP = Append[matriceP, P];
   mfugv1 = {{}};
   mfugl1 = {{}};
   mfugv2 = {{}};
   mfugl2 = {{}};
   my1 = {{}};
   my2 = {{}};
   indicek = indicek + 1;
   valorek = Append[valorek, k];

 (*--------------------------------------------------------THIS
PART------------------------------------------------------------------*)
\

   (**Catch*[Do[If[( (matriceP[[i-1,1]]-matriceP[[i-1,-1]])/
   matriceP[[i-1,1]])^2>( (matriceP[[i,1]]-matriceP[[i,-1]])/
   matriceP[[i,1]])^2,Throw[i+1]],{i,2,Length[valorek]}]]*)
   Do[If[( (matriceP[[i - 1, 1]] - matriceP[[i - 1, -1]])/
        matriceP[[i - 1, 1]])^2 < ( (
        matriceP[[i, 1]] - matriceP[[i, -1]])/matriceP[[i, 1]])^2,
     * Goto[thispoint]*], {i, 2, Length[valorek]}];
   , {k, -0.2, 0.2, 0.1}
   ]
 * Label[thispoint]*;
 ris = Append[{ris},
    Join[{P[[nump]]}, {Subscript[y, 1 n]}, {Subscript[y,
      2 n]}, {Subscript[f, 1 l][[nump]]}, {Subscript[f, 2 l][[
       nump]]}, {Subscript[f, 1 v]}, {Subscript[f,
      2 v]}, {Abs[
        Subscript[f, 1 l][[nump]] - Subscript[f, 1 v][[numy]]] +
       Abs[Subscript[f, 2 l][[nump]] - Subscript[f, 2 v][[numy]]]}]] //
    MatrixForm;
 DiscretePlot[P[[i]], {i, 1, Length[P]}];

 Do[Print["k12: ", valorek[[i]], " Arrive pressure: ",
   matriceP[[i, -1]],
   " Deviation: ", ( (matriceP[[i, 1]] - matriceP[[i, -1]])/
    matriceP[[i, 1]])^2], {i, Length[valorek]}] ]
matriceAAD =
 Table[( (matriceP[[i, 1]] - matriceP[[i, -1]])/
   matriceP[[i, 1]])^2, {i,
   Length[valorek]}](*Tabella di tutte le deviazioni *)
Print["k12 -> ",
 valorek[[Flatten[
   Position[matriceAAD, Min[matriceAAD]]]]], " AAD -> ",
 Min[matriceAAD]]

• Follow-Ups:
  • Re: Exit a loop
    • From: DrMajorBob <btreat1@austin.rr.com>