Using MATLAB (779505), страница 13
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It provides solutions to questions posed by users.4-34Getting HelpUsing the Help BrowserUse the Help browser to search and view documentation for MATLAB and yourother MathWorks products. The Help browser is a Web browser integrated intothe MATLAB desktop that displays HTML documents.To open the Help browser, click the help button in the toolbar, or typehelpbrowser in the Command Window. You can also access the Help browserby selecting Help from the View menu or by using the Help menu in any tool.The Help browser opens.Tabs in the Help Navigator pane provide different ways to find documentation.Use the close box to hide the pane.4-4View documentation in the display pane.Drag the separator bar to adjust the width of the panes.Using the Help BrowserThe Help browser consists of two panes:• The Help Navigator on the left, which you use to find information.
It includesa Product Filter and Contents, Index, Search, and Favorites tabs. Formore information, see “Using the Help Navigator” on page 4-7.• The display pane on the right, which is for viewing documentation.Changing the Size of the Help BrowserTo adjust the relative width of the two panes, drag the separator bar betweenthem. You can also change the font in either of the panes – use “Help FontsPreferences – Specifying Font Name, Style, and Size” on page 4-24.Once you’ve found the documentation you want, you can close the HelpNavigator pane so there is more screen space to view the documentation itself.This is shown in the following figure. To close the Help Navigator pane, clickthe close boxin the pane’s upper right corner or select View -> Help ViewOptions -> Show Help Navigator from the menu, which unchecks it. To openthe Help Navigator pane from the display pane, click the Help Navigator4-54Getting Helpbuttonin the upper left corner of the Help browser, or select View -> HelpView Options -> Show Help Navigator, which checks it.To show only the display pane, as inthis illustration, click the close box inthe Help Navigator pane.4-6Click this button toshow the HelpNavigator pane.Using the Help NavigatorUsing the Help NavigatorUse the Help Navigator, the left pane in the Help browser, to find informationin the online help.
These sections describe the main features:• “Using the Product Filter” on page 4-7 – Show documentation only forspecified products.• “Viewing the Contents Listing in the Help Browser” on page 4-9 – View anexpandable table of contents for documentation.• “Finding Documentation Using the Index” on page 4-11 – Use keywords tofind information.• “Searching Documentation” on page 4-13 – Find documentation usingfull-text and other forms of search.• “Bookmarking Favorite Pages” on page 4-15 – Designate favorite pages forlater use.Using the Product FilterUse the Product filter in the Help Navigator to show documentation only forthe products you specify.To show documentation for all MathWorks products installed on your system,select All.To show only a subset of the documentation for MathWorks products installedon your system, set the Product filter to Selected, which results in thefollowing:• The Contents listing shows only the subset of products you specify.• The Index shows only index terms for the subset of products you specify.• The Search feature only looks through the subset of products you specify.4-74Getting HelpTo specify the subset of products, click the Select button.
The Help ProductFilter dialog box opens.A checkmark appears for all products whose documentation is used in the HelpNavigator. Make changes to the selected products and click OK. Then, with theProduct filter set to Selected, the Help Navigator only shows documentationfor those products you specified.For example, if you’re doing a search and know the information you’re seekingis in MATLAB or the Communications Toolbox, in the Help Product Filter,click Clear All and then select MATLAB and Communications Toolbox.
In theHelp Navigator, set the Product filter to Selected. Then, the Contents wouldonly show MATLAB and the Communications Toolbox documentation, theIndex would only show entries for MATLAB and the Communications Toolbox,and the Search feature would only look in and show results for MATLAB andthe Communications Toolbox.The product filter settings are remembered for your next MATLAB session.4-8Using the Help NavigatorViewing the Contents Listing in the Help BrowserTo list the titles and table of contents for all product documentation, click theContents tab in the Help Navigator pane.In the Contents listing, you can:• Click the + to the left of an item to expand the listing for the item.• Click the - to the left of an item, or double-click the item to collapse thelistings for that item.• Select an item to show the first page of that document or section in thedisplay pane.4-94Getting Help• Double-click an item to expand the listing for that item and show the firstpage of that document or section in the display pane.• Use the down and up arrow keys to move through the list of items.The Contents listing shows documentation for all products installed on yoursystem, or only shows documentation for specified products if you have theProduct filter set to Selected.Product RoadmapWhen you select a product in the Contents pane (any entry with a book icon), such as MATLAB or the Communications Toolbox, a roadmap of thedocumentation for that product appears in the display pane.
The roadmappoints to the key documentation for that product and provides links to:• An index of documentation examples for that product• The PDF version of the documentation, which is suitable for printingProduct PagesAfter expanding the listing for a product in the Contents pane, the last entry isProduct Page (Web). This allows you to link to the MathWorks Web site forlatest information about that product.Contents Pane Is Synchronized with Display PaneBy default, the topic highlighted in the Contents pane always matches the titleof the page appearing in the display pane. The Contents listing is said to besynchronized with the displayed document.
This feature is useful if you accessdocumentation with a method other than the Contents pane, for example,using a link in a page in the display pane. With synchronization, you alwaysknow what book and section the displayed page is part of.You can turn off synchronization. To do so, use preferences – see “General –Synchronizing the Contents Pane with the Displayed Page” on page 4-23.Note that synchronization only applies to the Contents pane. The page shownin the display pane does not necessarily correspond to the selection in theSearch, Index, or Favorites tabs.4-10Using the Help NavigatorFinding Documentation Using the IndexTo find specific index entries (selected keywords) in the MathWorksdocumentation for your products, use the Index tab in the Help Navigatorpane.1 Set the Product filter to All or Selected.2 Click the Index tab.3 Type a word or words in the Search index for field.
As you type, the indexdisplays matching entries and their subentries (indented). It might take afew moments for the display to appear.The product and title of the document that includes the matching indexentry are listed next to the index entry, which is useful when there aremultiple matching index entries. You might have to make the HelpNavigator pane wider to see the product and document.4-114Getting Help4 Select the index entry from the list to display that page.The page appears in the display pane, scrolled to the location where theindex entry appears.5 To see more matching entries, scroll through the results.Tips for Using the Index.
If you’re not satisfied with the resulting index entries,try one of the following:• If the Product filter is set to Selected, change it to All to see more results.If it’s set to All, change it to Selected to see fewer results.• Type a different term or reverse the order of the words you type. Forexample, if you’re looking for writing M-files, instead type M-files andlook for the subentry creating.• Search for the term in the displayed page using the Find in page field.• Make the Help Navigator pane wider to see the name of the product anddocument to which the index entry pertains.• Try the Search tab – for instructions, see “Searching Documentation” onpage 4-13.4-12Using the Help NavigatorSearching DocumentationTo look for a specific phrase in the documentation, use the Search tab in theHelp Navigator pane.1 Set the Product filter to All or Selected.2 Click the Search tab.3 Select a Search type:- Full Text searches through all the text in the documentation.
This canresult in a very large number of results, so it’s best to use this after usingthe Document Titles or Function Name search types.- Document Titles searches through the headings in the documentation.This is the best way to start most searches.- Function Name searches through the function reference pages. This is theequivalent of the doc function.- Online Knowledge Base connects to the MATLAB Web site and searchesthrough the Technical Support information.4-134Getting Help4 Type the word or words you want to look for in the Search for field, and clickGo (or press Enter or Return).
The search automatically performs a booleanAND for multiple words. Do not explicitly type AND or similar booleanexpressions between words and do not place quotes around terms.The documents containing the search term are listed, grouped by product.The number of pages containing the search term is displayed in the statusbar. For each result, the Title and Section of the document containing thesearch phrase are displayed. You might have to make the Help Navigatorpane wider to see the Section name.5 Select an entry from the list of results.The page containing the search term appears in the display pane and alloccurrences of the search term are highlighted in the page.
For example, ifthe search term is font preferences, all occurrences of font and alloccurrences of preference are highlighted in the page. To see variants of theterm in the page, use the Find in page field.6 To see more matching search results, scroll through the list.Tips for Using SearchTry “Narrowing Search Results” or “More Search Results and Information”.Narrowing Search Results. If you see many results that are not relevant, try thefollowing.• Change the Search type.
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