Maple访问帮助系统【翻译】.docx

1、访问Maple帮助系统Accessing the Help System访问帮助系统To access the Maple help system:要访问Maple帮助系统： From the Help menu, select Maple Help.从“帮助”菜单中，选择“枫叶帮助气The Maple help system opens in a separate window. The window has two panes.The left pane contains the Help Navigator where you initiate searches or browse th

2、e table of contents, and the right pane displays help pages.Maple帮助系统将在单独的窗口中打开。这窗户有两块窗格。左侧窗格包含帮助 导航器，您可以在其中启动搜索或浏览日录，右窗格显示帮助页面。Using the Help Navigator使用帮助导航器Use the search field in the Help Navigator to find information on Maple commands and features.使用帮助导航器中的搜索字段查找有关Maple命令和功能的信息。 Search for a kn

3、own help topic, a command name, or a keyword or phrase.搜索已知的帮助主题、命令名或关键字或短语。 If you have any add-on products, you can restrict the search to Maple, MapleSim, or any combination of those products and their add-ons.如果您有任何附加产品，您可以将搜索限制为Maple、MapleSim或这些产品及 其附加组件的任何组合。 You can search al 1 resources or l

4、imit the search to specific Page Types such as assistants, help pages, manuals, or Math Apps.您可以搜索所有资源或将搜索限制为特定的页面类型，如助手、帮助页、手册 或数学应用程序。 Search results are displayed as a list in the Search Results tab of the left pane. The associated topic is displayed in the right pane. Some tutorials open in a Ma

5、ple window instead of in the Help window.搜索结果以列表形式显示在左窗格的“搜索结果”选项卡中。关联的主题将显 示在右侧窗格中。有些教程在枫树窗口中而不是在“帮助”窗口中打开。 You can also select the Table of Contents tab to view a structured list of all topics in the help system. For details, see Table of Contents.您也可以选择“目录”选项卡查看帮助系统中所有主题的结构化列表。有关详 细信息，请参阅目录。Resou

6、rce Icons资源图标 In the right pane, the type of resource is indicated by an icon. 在右窗格中，资源类型由图标指示。Question mark indicates a help page.问号表示帮助页。WS indicates an example worksheet or tutorial. These worksheets open in a Maple window.WS表示示例工作表或教程。这些工作表在一扇枫树窗里打开。T indicates a task template.T表示任务模板。M indicate

7、s a manual.M表示手册。D indicates a Math Dictionary term.D表示数学词典术语。Viewing Help Pages as Worksheets将帮助页作为工作表查看The Maple Help System allows you to open help pages as worksheets.Maple帮助系统允许您以工作表的形式打开帮助页面。 With the help page displayed in the right pane of the help system, from the View menu, select Open Pag

8、e as Worksheet. A new worksheet window opens.帮助页面显示在帮助系统的右窗格中，从“视图”菜单中选择“打开页面作为 工作表二将打开一个新的工作表窗口。 Alternately, click the Open current page as worksheet in the help system toolbar.或者，单击“帮助系统”工具栏中的“打开当前页面为工作表”。If you do not want to open the entire page as a worksheet, you can copy only the examples to

9、 a new worksheet. For details, see worksheet/expressions/copyexamplcs.如果不想将整个页面作为工作表打开，则只能将示例复制到新工作表中。有关详 细信息，请参见工作表/表达式/复制示例。2-D vs 1-D Math in Examples示例中的二维与一维数学You can choose to view the help page examples in either 1-D Maple Input or 2-D Math Input. This applies to the Examples section of all h

10、elp pages. By default, examples are displayed in 2-D math.您可以选择在一维Maple输入或二维数学输入中查看帮助页示例。这适用于所有 帮助页的示例部分。默认情况下，示例以二维数学形式显示。To switch between 2-D and 1-D math examples:要在二维和一维数学示例之间切换，请执行以下操作: In the help system, go to the View menu. If Display Examples with 2D math input is selected, then examples w

11、ill display in 2-D math; otherwise examples display in 1-D.在帮助系统中，转到“查看"菜单。如果选择了 “使用二维数学输入显示示例”, 则示例将以二维数学显示；否则，示例将以一维显示。 Alternately, click on the 1-D/2-D Math button on the help system toolbar.或者，单击“帮助系统”工具栏上的“一维/二维数学”按钮。If the icon is highlighted, then examples will display in 2-D math. Othe

12、rwise, examples display in 1D math.如果图标突出显示，则示例将以二维数学形式显示。否则，示例将以一维数学形 式显示。没有Maple等价物的SQL类型SQL types without a Maple Equivalent没有Maple等价物的SQL类型 Many of the SQL types have Maple equivalents. However, a few types do not map easily to Maple. In those cases, Database attempts to generate the best match

13、possible. Descriptions of the matches follow.许多SQL类型都有Maple等价物。但是，有一些类型不容易映射到Maple。在 这些情况下，数据库会尝试生成可能的最佳匹配。下面是对火柴的描述。 As Maple has no time or date type, the DATE, TIME, and TIMESTAMP SQL types need a representation. Database uses the number of seconds since epoch, stored as a numeric. With Maple arb

14、itrary precision floats, this representation unifies the three SQL types into one Maple type with enough accuracy to support TIMESTAMP* s nanosecond precision. Notice that these types have a limited accuracy (most notably DATE, which is only accurate to the day, a range of 86400 seconds), so the num

15、eric that is passed for one of these formats may be different from the value that is returned.由于Maple没有时间或日期类型，因此日期、时间和时间戳SQL类型需要一个 表示。数据库使用epoch以来的秒数，以数字形式存储。使用Maple任意精度浮点， 这种表示将三种SQL类型统一为一种Maple类型，其精度足以支持时间戳的纳秒精度。 请注意，这些类型的精度有限(最明显的是日期，它只精确到当天，范围为86400 秒)，因此为这些格式之一传递的数值可能与返回的值不同。Database represent

16、s BINARY, VARBINARY, and LONGVARBINARY as one dimensional Arrays of type integer'll.数据库将BINARY. VARBINARY和LONGVARBINARY表示为整数1类型的一维数组。Maple to SQLMaple 到 SQL When sending data to SQL, Maple attempts to determine the correct SQL type to use. This section discusses the conversion process and how to

17、 override the automatic detection. These conversions are used in calls to PreparedStatementExecute, UpdateData, and InsertRow.向SQL发送数据时，Maple会尝试确定要使用的正确SQL类型。本节讨论转换 过程以及如何覆盖自动检测。这些转换用于调用PreparedStatementExecute > UpdateData 和 InsertRowo Integers are converted to TINYINT, SMALLINT, INTEGER, BIGINT

18、, or NUMERIC, depending on the value of the integer.根据整数的值，将整数转换为 TINYINT.SMALLINT. INTEGER. BIGINT 或 NUMERIC0 Numerics are converted to DOUBLE or NUMERIC, depending on the value of the numeric. Only the magnitude, and not the accuracy, of the number is used when determining which type to use. If th

19、e type chosen by Database does not have sufficient accuracy, then an explicit cast must be used. A numeric value representing a DATE, TIME, or TIMESTAMP requires an explicit cast.根据数字的值，数字转换为双精度或数字。在决定使用哪种类型时，只使用数 字的大小，而不是精度。如果数据库选择的类型没有足够的精度，则必须使用显式转 换。表示日期、时间或时间戳的数值需要显式转换。 Strings are converted to

20、 VARCHAR or LONGVARCHAR, depending on the length of the string.根据字符串的长度，将字符串转换为VARCIIAR或LONGVARCIlARoValues of type Array( integerl ) are converted to VARBINARY or LONGVARBINARY, depending on the length of the array.类型为 Array (integerl)的值将转换为 VARBINARY 或 LONGVARBINARY,具体 取决于数组的长度。Explicit Casts显式强制转

21、换 If the SQL type that Database selects is incorrect, you can override this behavior by using an explicit cast. To perform a cast, use : and the SQL type name you want to cast to. For example, 1:DOUBLE or 12346789:TIMESTAMP. Specifying an illegal cast is an error.如果数据库选择的SQL类型不正确，您可以使用显式转换重写此行为。若要执 行强制转换，清使用：和要强制转换到的SQL类型名称。指定非法强制转换是一个 错误。 The Result module UpdateData and InsertRow commands are able to look up column types, so using explicit casts is not required. However, looking up column types can require database access. This ca