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- FRONTLINE SOLVER FOR EXCEL HOW TO
- FRONTLINE SOLVER FOR EXCEL CODE
- FRONTLINE SOLVER FOR EXCEL WINDOWS
Furthermore, the user does not need to know (1) how to form the condition equations (2) how to differentiate complex equations (3) how to solve the normal equations used in a conventional least squares approach. Since the solution of least squares problems requires minimization, Excel with its strong Graphic User Interface (GUI) provides a convenient and readily available tool, the Solver, to adjust small to medium size traverses encountered in day to day surveying practices. 1.1 About Microsoft Excel Solver The Excel Solver Engine, developed by Frontline Systems, Inc., is a standard feature of any Microsoft Office product. The models include a single traverse loop and interconnected traverse loops where observations are independently weighted. This paper describes various techniques for modeling survey traverse data to be adjusted by least squares. INTRODUCTION Solver is an Add-in tool in Microsoft Excel designed to perform optimization solutions for modeling systems. Traverse Adjustment Using Microsoft Excel Solver 1/20ģ Traverse Adjustment Using Microsoft Excel Solver by: Surveying Engineering Department Ferris State University, Big Rapids, MI USA 1. The paper also provides some useful Visual Basic functions used in traverse adjustment. The data transfer to and from Excel is very flexible.
FRONTLINE SOLVER FOR EXCEL WINDOWS
Excel is readily available in any Windows platform without any additional cost. The reasons the use of Excel for traverse adjustment can be considered a viable option are: a. This paper provides: a brief overview of Excel s Add-in Solver basic theory of least squares as implemented within the Solver advantages and disadvantages of the Excel Solver in least squares, and two numerical examples outlining the steps involved in carrying out a traverse adjustment.
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Although several least squares adjustment packages are available, Microsoft Excel provides another option for performing a rigorous least squares traverse adjustment. However, when a traverse becomes more complicated with multiple junction points yielding redundancies greater than three, Compass Rule or Transit Rule adjustments will not be able to do an effective job, particularly when observations (distances and angles) have different weights. For more help on using the Solver functions in VBA, search for "solver" using the VBA help system.1 Traverse Adjustment Using Microsoft Excel Solver by: Surveying Engineering Department Ferris State University, Big Rapids, MI USA Traverse Adjustment Using Microsoft Excel Solver 0/20Ģ Traverse Adjustment Using Microsoft Excel Solver by: Surveying Engineering Department Ferris State University, Big Rapids, MI USA Key words: Traverse Adjustment, Least Squares, Excel Solver Abstract Simple two-dimensional traverses can easily be adjusted using Compass Rule or Transit Rule. To keep the Solver Results dialog box from showing up, the userFinish:=True option has been added to the SolverSolve function.
FRONTLINE SOLVER FOR EXCEL CODE
The VBA code for the Solver macro that was recorded for Example 2 is shown You can also press Alt+ F11 to open up VBA.Īdd the Solver reference in visual basic (Tools > References., then make (Right-click on the button andīefore the macro will work, a reference to the Solver VBA add-in functionsĮdit the macro you just created (Tools > Macro > Macros. Toolbar is not displayed, right-click on any toolbar and click on "Forms".)Īssign the macro you created to the button. ).Īdd a button to the worksheet, using a button from the Forms toolbar. Stop the macro recorder (Tools > Macro > Stop Recording. ).Ĭlear any existing solver settings (Press the Reset All button).Ĭhoose the target cell, design variables, and constraints and press the Open the solver dialog box (Tools > Solver. Start the macro recorder (Tools > Macro > Record New Macro. Let's use the problem from Example 2 above. Is to first record all the steps used to set up and run the solver. Macro that can be run by pressing a single button. Routine a number of times using the same model, it is convenient to create a If you need to solve the same system of equations or run an optimization For optimization problems, this means that the solution may be only a local optimum. The solution may depend upon the starting values. This example has demonstrated a very important point having to do with the Excel solver and optimization in general. Figure 4: Mechanism showing two possible configurations.