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second row will be ignored, as it has no bearing on the determination of the minimum value Range(VarA) Returns the difference between the maximum and minimum elements of the array VarA VarA must be one- or two-dimensional and contain only numeric data If VarA is two-dimensional then the second row will be ignored, as it has no bearing on the determination of the range value Count(VarA) Returns the number of elements in the array VarA VarA must be oneor two-dimensional and contain only numeric data If VarA is two-dimensional then the rst row will be ignored, as it has no bearing on the determination of the count The count will be the sum of all the frequencies in the second row If there are elements in the rst row without a corresponding frequency then the frequency will be considered to be 1.

IBM provides a Linux version of its DB2 Universal Database software. You can download it free from the IBM DB2 Web page for Linux, www.software.ibm.com/ data/db2/linux/. DB2 Universal Database for Linux includes Internet functionality along with support for Java and Perl. With the Web Control Center, administrators can maintain databases from a Web browser. DB2 features scalability to expand the database easily, support for Binary Large Objects, and cost-based optimization for fast access. DB2 is still very much a mainframe database, though IBM is currently working on refining its Unix/Linux version.

The KDE file manager doubles as a Web browser and an FTP client. It includes a box for entering either a pathname for a local file or a URL for a Web page on the Internet or your intranet. A navigation toolbar can be used to display previous Web pages or previous

directories. The Home button will always return you to your home directory. When accessing a Web page, the page is displayed as on any Web browser. With the navigation toolbar, you can move back and forth through the list of previously displayed pages in that session. This feature is particularly convenient for displaying local Web pages, such as documentation in HTML format. Most Linux distributions provide extensive documentation in the form of Web pages you can easily access and display using a KDE file manager window. Figure 9-9, shown previously, shows the KDE file manager window, operating as a Web browser and displaying a Web page. The KDE file manager also operates as an FTP client. When you access an FTP site, you navigate the remote directories as you would your own. The operations to download a file are the same as copying a file on your local system. Just select the file's icon or entry in the file manager window and drag it to a window showing the local directory to which you want it downloaded. Then, select the Copy entry from the pop-up menu that appears. By default, KDE attempts an anonymous login. If you want to perform a nonanonymous login as a particular user, add the user name with an @ symbol before the FTP address. You are then prompted for the user password. For example, the following entry logs in to the ftp.mygames.com server as the user chris:

Variance(VarA) Returns the variance of the elements of the array VarA VarA must be one- or two-dimensional and contain only numeric data If VarA is two-dimensional then the second row must contain the frequencies for the data in the rst row If there is no corresponding frequency for any element in the rst row then it is considered 1 StdDev(VarA) Returns the standard deviation of the elements of the array VarA VarA must be one- or two-dimensional and contain only numeric data If VarA is two-dimensional then the second row must contain the frequencies of the elements in the rst row If there is no corresponding frequency for any element in the rst row then it is considered 1 CorrCoef(VarA) Returns the value of the correlation coef cient for the data in array VarA VarA must be two-dimensional.

To perform an operation on a file or directory, you first have to select it In KDE, to select a file or directory, you hold the CTRL key down, while clicking the file's icon or listing To select more than one file, continually hold the CTRL key down while you click the files you want Or, you can use the keyboard arrow keys to move from one file icon to another and then use the SPACEBAR to select the file you want To copy and move files, you can use the standard drag-and-drop method with your mouse To copy a file, you locate it by using the file manager Open another file manager window to the directory to which you want the file copied Then, click and drag the File icon to that window (be sure to keep holding down the mouse button).