×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

using excel solver in a loop for dynamic simulation

using excel solver in a loop for dynamic simulation

using excel solver in a loop for dynamic simulation

(OP)
Hi,

I'm kind of new to the use of VBA and the excel solver, but I'm having trouble writing a part of a dynamic simulation program. The loop looks OK but the seover won't fill the variable cells with values. I think I must have a problem with the use of the "i" variable...anyone can help on that??

Sub solver_ptE()

Dim i As Integer

For i = 32 To 50 Step 1

    SolverOk SetCell:="$I$i", MaxMinVal:=1, ValueOf:="0", ByChange:="$N$i:$O$i"
    SolverAdd CellRef:="$L$i", Relation:=2, FormulaText:="$C$27^2"
    SolverAdd CellRef:="$M$i", Relation:=2, FormulaText:="$K$i^2"
    SolverOk SetCell:="$I$i", MaxMinVal:=1, ValueOf:="0", ByChange:="$N$i:$O$i"
    SolverSolve (True)
    Solverreset

Next i


End Sub

RE: using excel solver in a loop for dynamic simulation

Quotes are for literals.  Since you are using a variable, it needs to be outside of the literal and should be concatenated to the literal with a + sign.  VB should recognize that as a concatenation.

TTFN

TTFN

RE: using excel solver in a loop for dynamic simulation

As an example what you should use (more or less):


Sub solver_ptE()

Dim i As Integer, s As String

For i = 32 To 50 Step 1
    s = Format(i, "0")
    SolverOk SetCell:="$I$" & s, MaxMinVal:=1, ValueOf:="0", ByChange:="$N$" & s & ":$O$" & s
    SolverAdd CellRef:="$L$" & s, Relation:=2, FormulaText:="$C$27^2"
    SolverAdd CellRef:="$M$" & s, Relation:=2, FormulaText:="$K$" & s & "^2"
    SolverOk SetCell:="$I$" & s, MaxMinVal:=1, ValueOf:="0", ByChange:="$N$" & s & ":$O$" & s
    SolverSolve (True)
    SolverReset

Next i


End Sub

Regards,

Joerd

RE: using excel solver in a loop for dynamic simulation

(OP)
Thanks you for your help Joerd and irstuff, your reply helped me a lot!!! Now my simulation program is complete and works loke a charm!!

Thanks a lot!!!!

Mountainman

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources