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Computers on the Farm 2014 User-Defined Functions in Excel.

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Presentation on theme: "Computers on the Farm 2014 User-Defined Functions in Excel."— Presentation transcript:

1 Computers on the Farm 2014 User-Defined Functions in Excel

2 Did you know it is not illegal to shoot over a fence? A bullet cannot trespass! Not only is it legal, the conservation agent will help the shooter try to recover the game. Any game ranchers with big deer in the audience? Missouri Law

3 User-Defined Functions for Excel Mike Monson Department of Agricultural and Applied Economics University of Missouri

4 User Defined Functions are installed into the same files as Macros. Macros begin with SUB, and User Defined Functions begin with FUNCTION. Another distinction is that you will not find UDF in the macro list (Alt+F8), but you will find them in the Function Wizard list from the address bar button, or from the insert menu (then function...). This source has many of my favorites but not necessarily the clearest explanation.

5 How to Create Custom User Defined Excel Functions Advanced Excel Techniques - (1/7/04) by Jon Wittwer Excel allows you to create custom functions, called "User Defined Functions" (UDFs) that can be used the same way you would use SUM() or some other built-in Excel function. This can be especially useful for advanced mathematics or special text manipulation. In fact, many Excel add-ins provide large collections of specialized functions. This article will help you get started creating user defined functions with a couple of useful examples.

6 Create a complex or custom math function. Simplify formulas that would otherwise be extremely long "mega formulas". Diagnostics such as checking cell formats. Custom text manipulation. Advanced array formulas and matrix functions Advantages of User-Defined Functions

7 Cannot "record" an Excel UDF like you can an Excel macro. More limited than regular VBA macros. UDF's cannot alter the structure or format of a worksheet or cell. If you call another function or macro from a UDF, the other macro is under the same limitations as the UDF. Cannot place a value in a cell other than the cell (or range) containing the formula. In other words, UDF's are meant to be used as "formulas", not necessarily "macros". Excel user defined functions in VBA are usually much slower than functions compiled in C++ or FORTRAN. Often difficult to track errors. If you create an add-in containing your UDF's, you may forget that you have used a custom function, making the file less sharable. Adding user defined functions to your workbook will trigger the "macro" flag (a security issue: Tools > Macros > Security...). Disadvantages of User-Defined Functions

8 1.Open up a new workbook 2.Get into VBA (Press Alt+F11) 3.Insert a new module (Insert > Module) 4.- Copy and Paste the Excel user defined function examples - 5.Get out of VBA (Press Alt+Q) 6.Use the functions (They will appear in the Paste Function dialog box, Shift+F3, under the "User Defined" category)

9 One of the new features in Excel 2010 is the ability to provide argument descriptions for user-defined functions. These descriptions appear in Function Arguments dialog box -- which is displayed after you choose a function using the Insert Function dialog box. VBA macro You need to run this macro only one time. After doing so, the descriptive information is stored in the workbook (or add-in) that defines the function. User-Defined Function Argument Descriptions In Excel 2010

10 Thank you! Dosbox?

11 Missouri Revised Statutes Chapter 571 Weapons Offenses Section August 28, 2013 Unlawful use of weapons--exceptions--penalties A person commits the crime of unlawful use of weapons if he or she knowingly: (1) Carries concealed upon or about his or her person a knife, a firearm, a blackjack or any other weapon readily capable of lethal use; or (2) Sets a spring gun; or (3) Discharges or shoots a firearm into a dwelling house, a railroad train, boat, aircraft, or motor vehicle as defined in section , or any building or structure used for the assembling of people; or (4) Exhibits, in the presence of one or more persons, any weapon readily capable of lethal use in an angry or threatening manner; or (5) Has a firearm or projectile weapon readily capable of lethal use on his or her person, while he or she is intoxicated, and handles or otherwise uses such firearm or projectile weapon in either a negligent or unlawful manner or discharges such firearm or projectile weapon unless acting in self-defense; or (6) Discharges a firearm within one hundred yards of any occupied schoolhouse, courthouse, or church building; or (7) Discharges or shoots a firearm at a mark, at any object, or at random, on, along or across a public highway or discharges or shoots a firearm into any outbuilding; or (8) Carries a firearm or any other weapon readily capable of lethal use into any church or place where people have assembled for worship, or into any election precinct on any election day, or into any building owned or occupied by any agency of the federal government, state government, or political subdivision thereof; or (9) Discharges or shoots a firearm at or from a motor vehicle, as defined in section , discharges or shoots a firearm at any person, or at any other motor vehicle, or at any building or habitable structure, unless the person was lawfully acting in self-defense; or (10) Carries a firearm, whether loaded or unloaded, or any other weapon readily capable of lethal use into any school, onto any school bus, or onto the premises of any function or activity sponsored or sanctioned by school officials or the district school board. 2. Subdivisions (1), (8), and (10) of subsection 1 of this section shall not apply to the persons described in this subsection, regardless of whether such uses are reasonably associated with or are necessary to the fulfillment of such person's official duties except as otherwise provided in this subsection. Subdivisions (3), (4), (6), (7), and (9) of subsection 1 of this section shall not ….. But there is nothing more that is relevant here.

12 Texas Parks and Wildlife Code - Section Discharge Of Firearm Across Property Line. § DISCHARGE OF FIREARM ACROSS PROPERTY LINE. (a) In this section, "firearm" has the meaning assigned by Section (a). (b) A person commits an offense if: (1) the person, while hunting or engaging in recreational shooting, knowingly discharges a firearm; and (2) the projectile from the firearm travels across a property line. (c) It is a defense to prosecution under this section that the person: (1) owns the property on both sides of each property line crossed by the projectile; or (2) has a written agreement with any person who owns property on either side of each property line crossed by the projectile that allows the person to discharge a firearm on, over, or across the property or property line. (d) The written agreement required under Subsection (c)(2) must: (1) contain the name of the person allowed to hunt or engage in recreational shooting in a manner described by Subsection (b); (2) identify the property on either side of the property line crossed by the projectile; and (3) be signed by any person who owns the property on either side of the line crossed by the projectile. (e) An offense under this section is a Class C Parks and Wildlife Code misdemeanor. (f) If conduct constituting an offense under this section constitutes an offense under a section of the Penal Code, the person may be prosecuted under either section or both sections. Added by Acts 2005, 79th Leg., ch. 270, § 1, eff. Sept. 1, Return


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