Scripting Guide - SAS

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Contents Lists and Expressions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 Stored expressions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 Macros . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192 Manipulating lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192 Manipulating expressions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .194 Advanced Scoping and Namespaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198 Names Default To Here. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198 Scoped Names. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .201 Namespaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204 Referencing Namespaces and Scopes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209 Resolving Named Variable References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212 Best Practices for Advanced <strong>Scripting</strong> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214 Advanced Programming Concepts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214 Throwing and Catching Exceptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .216 Recursion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217 Includes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217 Loading and Saving Text Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218 <strong>Scripting</strong> BY Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218 Organize Files into Projects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219 Encrypt and Decrypt Scripts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221 Encrypting Scripts in Data Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .223 Additional Numeric Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .224 Derivatives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .224 Algebraic Manipulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .226 Maximize and Minimize . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .227 Scheduling Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .228 Functions that Communicate with Users. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .230 Writing to the Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .230 Send information to the User . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Chapter 8 Programming Methods 183 Lists and Expressions Lists and Expressions Stored expressions An expression is something that can be evaluated. The first section of the chapter, “Name Resolution,” p. 97 in the “JSL Building Blocks” chapter, discussed how JMP evaluates expressions. Now you must consider when JMP evaluates expressions. JMP tends to evaluate things as soon as it possibly can, and it returns a result. If an expression is on the right side of an assignment, the result is what is assigned. Usually, that is what you want and expect, but sometimes you need to be able to delay evaluation. Quoting and unquoting expressions The operators to control when expressions are evaluated are Expr and Eval, which you should think of as the procrastination and eager operators. Expr just copies its argument as an expression, rather than evaluating it. Eval does the opposite: it evaluates its argument, and then takes that result and evaluates it again. Expr and Eval can be thought of as quoting and unquoting operators, telling JMP when you mean the expression itself, and when you mean the result of evaluating the expression. The following examples all assume these two assignments: x=1; y=20; If you assign the expression x+y to a, quoting it as an expression with Expr, then whenever a is evaluated, it evaluates the expression using the current values of x and y and returns the result. (Exceptions are the utilities Show, Write, and Print, which do not evaluate expressions for pure name arguments.) a = expr(x+y); a; 21 If you want the expression that is stored in the name, rather than the result of evaluating the expression, use the NameExpr function. See “Retrieve a stored expression, not its result,” p. 185. show(nameExpr(a)); NameExpr(a) = x + y If you assign an extra level of expression-quoting, then when a is evaluated, it unpacks one layer and the result is the expression x+y. a = expr(expr(x+y)); show(a); a = Expr(x + y) If you want the value of the expression, then use Eval to unpack all layers: show(eval(a)); Eval(a) = 21
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6 Capturing a Script for a Data Tab
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8 Repeat . . . . . . . . . . . . .
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10 Getting a Data Table Object . .
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12 Build Your Own Displays from Scr
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14 Using the mouse . . . . . . . .
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16 B Discrete Probability Functions
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Chapter 1 Learn about JMP Documenta
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Chapter 1 Learn about JMP 21 Book C
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Chapter 1 Learn about JMP 25 Additi
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Chapter 2 Introduction Welcome to t
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Chapter 2 Introduction 31 What JSL
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Chapter 2 Introduction 33 Terminolo
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Chapter 2 Introduction 35 Terminolo
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Chapter 3 Getting Started Let JMP W
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Chapter 3 Getting Started 39 Captur
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Chapter 3 Getting Started 41 Captur
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Chapter 3 Getting Started 43 Gluing
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Chapter 3 Getting Started 45 Gluing
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Chapter 4 Scripting Tools Using the
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Chapter 4 Scripting Tools 49 Using
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Chapter 4 Scripting Tools 57 Debug
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Chapter 5 JSL Building Blocks Learn
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Chapter 6 Types of Data Working wit
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Chapter 9 Data Tables Create, Open,
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Chapter 9 Data Tables 243 Messages
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Chapter 9 Data Tables 275 Manipulat
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Chapter 9 Data Tables 303 Calculati
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Chapter 11 Display Trees 383 Syntax
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Index JSL Syntax Reference Symbols
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Index 547 D Data Table 697 Datafeed
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Index 549 Interest Payment 611 Inte
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Index 551 Number 683 Number Col Box
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Index 553 SAS Submit 677 SAS Submit
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Appendix A JSL Syntax Reference Sum
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Appendix A JSL Syntax Reference 557
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Appendix B Messages 741 Associative
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Appendix B Messages 743 Data Tables
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Appendix B Messages 763 Display Box
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Appendix D Glossary Terms, Concepts
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Appendix D Glossary 813 ODBC databa
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Index JMP Scripting Guide Symbols `
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Index 817 property parameters 284 c
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Index 819 Disable 465 Disk 448 Disp
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Index 821 HLine 405 HList 377, 380
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Index 823 objects 240 platform 310
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Index 825 Point Size 443 POINTS 440
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Index 827 Show Properties 243, 276,
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