MATLAB POLYSPACE 7 Przewodnik Instalacji Strona 473
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Oceniono. / 5. Na podstawie oceny klientów
M-Lint Code Check Report
Messages and Resulting Changes for the lengthofline Example. The
following table describes each message and demonstrates a way to change the
file, based on the message.
Message — Code (Original Line Numbers)
Explanation and Updated Code (New
Line Numbers)
22: The value assigned here to
variable 'nothandle' might never be
used.
—————————————————
22 nothandle = ~ishandle(hline);
23 for nh = 1:prod(size(hline))
24 notline(nh) = ~ishandle(hline(nh))
...
In line 22, nothandle is assigned a valu e, bu t
nothandle is probably not used anywhere after
thatinthefile. Thelinemightbeextraneous
and you could delete it. But it might be that
you actually intended to u se the variable, which
isthecaseforthe
lengthofline example.
Update line 24 to use
nothandle,whichis
faster th a n computing
~ishandle for ea ch
iteration of the loop, as s h own he re.
22 nothandle = ~ishandle(hline);
23 for nh = 1:numel(hline)
24 notline(nh) = nothandle(nh) ...
23: NUMEL(x) is usually faster than
PROD(SIZE(x)).
—————————————————
23 for nh = 1:prod(size(hline))
While prod(size(x)) returns the number
of elements in a m atrix, the
numel function
wasdesignedtodojustthat,andthereforeis
usually more efficient. Type
doc numel to see
the
numel reference page. Change the line to
23 for nh = 1:numel(hline)
7-21
- 508-647-7000 (Phone) 2
- 508-647-7001 (Fax) 2
- The MathWorks, Inc 2
- 3 Apple Hill Drive 2
- Natick, MA 01760-2098 2
- Revision History 3
- Contents 5
- Help for Using MATLAB 10
- Editing and Debugging M-Files 13
- Tuning and Managing M-Files 16
- Source Control Interface 18
- Startup and Shutdown 21
- 1 Startup and Shutdown 22
- .mat extension 23
- .fig, .m, .mat,and.mdl 27
- Star tup Directory for MATLAB 28
- For Windows Platforms Only 29
- For All P latforms 31
- Star tup Options 32
- $user/mytools 32
- Startup Options 33
- About Toolbox Path Caching 37
- UsingtheCacheFileUponStartup 37
- Other Startup Topics 41
- Quitting MATLAB 43
- -r option or run in deploye d 45
- Over view of th e Desktop 49
- Summary of Desktop Tools 51
- Arranging the Desktop 52
- Saving Desktop Layouts 59
- Default desktop layout 64
- The document bar is hidden 75
- Creating Shortcuts 79
- Running Shortcuts 81
- Shortcuts Toolbar 81
- Shortcut Labels on Toolbar 83
- Click Close 85
- Keyboard Shor tcuts 86
- Keyboard Shortcuts 87
- Toolbars 93
- Status Bar 95
- Sizing, Arra 95
- Cut, Copy, Paste 97
- ,andMove 97
- Specifying Page Setup Options 99
- 2 Desktop 100
- Web Browser 101
- Other Desktop Features 103
- Preferences 105
- Preferences File — matlab.prf 107
- DefaultFontSettings 111
- Custom Fonts Preferences 113
- See Also 115
- Syntax Highlighting Colors 119
- Other Colors 121
- MAT-Files Preferences 125
- Accessibility 131
- Assistive Technologies 133
- Setting Up JAWS 135
- Troubleshooting 137
- - Previous history: Ctrl+p 138
- - Next history: Ctrl+n 138
- Running Functions — 139
- Command Window and 139
- The Command Window 141
- Command W 142
- Getting Started 143
- Message Bar in the Command 143
- Running M -Files 146
- Running External Programs 147
- 2 Start M ATLAB 149
- 3 In M ATLAB, type 149
- Function Alternative 150
- Displaying Hype 151
- Controlling Input 153
- Syntax Highlighting 154
- Recalling Previous Lines 157
- Multiple Possible Completions 159
- Tab Completion for Structures 162
- Tab Completion for Properties 163
- Controlling Output 168
- Examples of Formats 169
- Clearing the Command Window 170
- Printing Comman 171
- Keeping a Sessi 171
- Introduction 172
- Find Dialog Box 172
- Incremental Search 173
- 5 To find 175
- 1,000 to 25,000.Thisisthe 180
- Keyboard Preferences 181
- Command Window Key Bindings 182
- Editor/Debugger Key Bindings 183
- Tab Completion 183
- Tabs and Indents 184
- Delimiter Matching 184
- Beep — MATLAB beeps 186
- None —Thereisnoalert 186
- Command History Window 187
- Searching in the 190
- To highli 193
- Finding Text 194
- Settings 197
- 4 Help for Using MAT LAB 200
- Help Browser Overview 201
- Resizing the Hel 203
- Types of Documentation 205
- Adding Help Files 207
- DocumentationinOtherLanguages 207
- Product Roadmap 209
- Index for the Help B rowser 211
- Tips for Using the Index 213
- Exact Phrases in Search 219
- Boolean Operators in Search 219
- Get More Results 221
- Go to Favorites 223
- Organize Favorites 223
- Browse to Other Pages 225
- Copy Information 227
- Evaluate a Selection 227
- Open a Selection 227
- Help on Sele ction 227
- View the Page Source (HTML) 227
- Demos in the Help Browser 229
- Searching for Demos 233
- Product Filter 235
- Comic Sans 239
- Printed Documentation 240
- Help Functions 242
- Other Forms of Help 249
- Workspace, Search Path 253
- MATLAB Workspace 254
- Opening the Work 255
- Saving the Current Workspace 257
- Saving Selected Variables 258
- Importing Data 259
- Deleting Workspace Variables 260
- NaN, although 263
- About the Ar 264
- Opening t 264
- Multidimensional Arrays 266
- R = rand(1,2,3) 267
- Elements in the Array Editor 269
- International Number Handling 274
- Search Path 275
- Viewing and Sett 278
- Viewing the Search Path 279
- Saving Settings to the Path 282
- File Management Operations 287
- Current D irectory Browser 288
- Viewing and Maki 290
- Changing the Display 293
- Directories and Files 295
- Creating New F iles 296
- Creating New Director ies 296
- Opening and Running Files 299
- Opening Files from Find Files 304
- Comparing Files 306
- Auto-Refresh 308
- Editing and Debugging 309
- BeginwithExistingCode 311
- Demos and Examples 312
- File Exchange 312
- Starting the Editor/Debugger 315
- M-File Cells 318
- Closing the Editor/ Debugger 321
- Editor/Debugger 322
- Undo and Redo 323
- Adding Comments 323
- Narrowing Completions Shown 332
- Using Tab for Spacing 335
- Indenting 337
- Line and Column Numbers 338
- Highlight Current Line 338
- Right-Hand Text Limit 339
- View Function or Subfunction 339
- Constructs 339
- Split Screen Display 346
- • Double-click the splitter 349
- Navigating in an M-File 350
- Going to 351
- OpeningaSelectioninanM-File 356
- Finding Text in F iles 357
- Replacing Text 358
- Finding Text in Files 361
- Exchange Positions 365
- Show Updated Files 365
- Find Text in Files 365
- Compare to Other Files 365
- Alternative Way 366
- >> 369
- Saving Files 370
- Autosave 371
- Printing M-Files 372
- Closing M-Files 372
- Find Configurations 383
- Configurations 386
- 4 Click the Remove 387
- 4 You might 389
- M-Lint Code Analyzer 395
- M-Lint Automati 396
- Editor/Debugge 396
- Open the example file: 397
- (in functions) 406
- %#ok for that 409
- Ways to Debug M-Files 411
- Preparing for Debugging 411
- Code for collatz.m 413
- Code for collatzplot.m 413
- Setting Breakpo 415
- Setting Standard Breakpoints 416
- Running the Example 419
- SteppingThroughanM-File 420
- Examining Value 422
- K>> prompt. To see the 423
- Evaluating a Selection 425
- Ending Debugging 427
- Saving Breakpoints 429
- Correcting an M-File 429
- Completing the Example 429
- Conditional Breakpoints 434
- Breakpoints 436
- Error Breakpoints 437
- Setting Error Breakpoints 438
- 3 Click Add 439
- What Are Cells? 441
- Rapid Code Iteration Overview 441
- %%.Fordetails,see 442
- Defining Cells 443
- Cell Titles and Highlighting 444
- Example — Define Cells 445
- Removing Cells 447
- EvaluatingCellsinanM-File 448
- Modifying Values in a Cell 449
- Example — Evaluate Cells 449
- 0.0625 to 0.125 451
- Tuning and Managing 453
- 7 Tuning and Managing M-Files 454
- Show Subfunctions 459
- Contents Report 461
- Contents.m file directly, or 463
- Dependency Repor t 465
- Coverage Report 467
- M-Lint Code Check Report 468
- What Is Profiling? 479
- Using the Profiler 481
- Profile Summary Report 485
- Profile Detail Report 487
- Child Functions 491
- Function Listing 493
- -detail level 495
- Accessing Profiler Results 497
- function 499
- Publishing Results 501
- Using Cells 502
- 8 Publishing Results 504
- Overview of Text Markup 511
- FILENAME.PNG,with 515
- FILENAME.PNG with 515
- Output Types 517
- % _ITALIC TEXT_ 521
- % 521
- % Calculate and plot 521
- 521
- MONOSPACED TEXT 521
- About Published M-Files 525
- Notebook features 529
- Opening an Existing M-Book 531
- 4 Click OK 533
- 1 Create a new M-book 533
- Ensuring Data Co 535
- Debugging an 535
- This is a sample cell group 537
- Creating a Calc Zone 539
- Notebook 545
- Printing an M-Book 547
- 3 Click OK 549
- Configuring Notebook 553
- Notebook Feature Reference 554
- Define Autoinit Cell 555
- Define Calc Zone 555
- Evaluate Cell 557
- Hide Cell Markers 559
- Notebook Options 559
- Ungroup Cells 561
- 9 Source Control Interface 564
- Add Files to Source Control 571
- MATLAB on Windows 573
- Undoing the Checkout 575
- @ character in the directory 587
- MATLAB Alternative 589
- Setting a V iew an 591
- ClearCaseonUNI 591
- Checking 593
- Directory Browser 595
- Version of a File 597
- Undoing the Checkout on UNIX 598
- K>> 609
- Index-10 610
- Index-11 611
- Index-12 612
- Index-13 613
- Index-14 614
- Index-15 615
- Index-16 616
- Index-17 617
- Index-18 618
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