#!F-adobe-helvetica-medium-r-normal--18* #!N #!CSeaGreen #!N #!Rall37 Example 1 #!N #!EC This example illustrates the importation of a simple data set consisting of a single variable on a 5 * 5 * 5 grid. #!N #!I0 #!N #!F-adobe-times-medium-r-normal--18* #!N #!N #!I30 #!N 1. First enter: #!CForestGreen #!N #!N #!F-adobe-courier-bold-r-normal--18* #!N dx -prompter #!EF #!N #!N #!EC You can also access the Data Prompter by choosing #!F-adobe-times-bold-r-normal--18* Import Data #!EF from the Data Explorer Startup window. #!N #!N When the initial dialog box appears (see #!Ldp115,dxall160 f Figure 15 #!EL ), choose Grid or Scattered File, and then type the path name /usr/lpp/dx/samples/tutorial/external.data. into the #!F-adobe-times-bold-r-normal--18* Data file name #!EF field at the top of the dialog. #!N #!I30 #!N 2. Press the #!F-adobe-times-bold-r-normal--18* Describe Data #!EF button to bring up a window which allows you to describe the data. #!N #!I30 #!N 3. You can now view the file by clicking on the ellipsis button ( #!F-adobe-times-bold-r-normal--18* ... #!EF ) to the right of the file-name field and selecting #!F-adobe-times-bold-r-normal--18* Browser #!EF from the pull-down menu. The #!F-adobe-times-bold-r-normal--18* File Browser #!EF window appears. (If necessary, move this window so that you can view it and the Data Prompter window at the same time.) It is also possible to browse the data file from the initial prompter window once the file name has been entered. #!N #!I30 #!N 4. The first three lines of the file may look like data, but they are header information, so click on the #!F-adobe-times-bold-r-normal--18* Header #!EF toggle button and then on #!F-adobe-times-bold-r-normal--18* # of bytes #!EF to the right (now activated). #!N #!I30 #!N 5. Select #!F-adobe-times-bold-r-normal--18* # of lines #!EF and enter the value "3" in the associated field. #!N #!I30 #!N 6. The first line of the header gives the grid dimensions as 5 5 5, so enter these numbers in the first three #!F-adobe-times-bold-r-normal--18* Grid size #!EF fields. Note what happens in the #!F-adobe-times-bold-r-normal--18* Grid positions #!EF fields as each number is entered. (You can use the tab key or the mouse to move the cursor from one field to the next.) #!N #!I30 #!N 7. For #!F-adobe-times-bold-r-normal--18* Data format #!EF , ensure that #!F-adobe-times-bold-r-normal--18* ASCII (text) #!EF is selected. #!N #!I30 #!N 8. Next you need to specify whether the data is in row or column majority order. In this particular file, the data is in row majority, so select that button. #!N #!I30 #!N 9. Position the cursor in the first #!F-adobe-times-bold-r-normal--18* origin, delta #!EF field, hold down the left mouse button, and drag the cursor over the numbers there to highlight the field before releasing the mouse button. The default values and the highlight bar will disappear as soon as you start typing. #!N #!I30 #!N 10. The origin of the grid is [1.0, 3.0, 2.0] (second line of the header) and the corresponding deltas are .5, .3, and .8, respectively (third line). So enter the values: #!CForestGreen #!N #!N #!F-adobe-courier-bold-r-normal--18* #!N 1, .5 #!N 3, .3 #!N 2, .8 #!EF #!N #!N #!EC in the three #!F-adobe-times-bold-r-normal--18* origin, delta #!EF fields. #!N #!I30 #!N 11. On the right side of the prompter window, you can change the name of the data variable (field0 by default) and specify the data type and structure. For this example, the data are floating-point scalar, so you do not need to change the settings. #!N #!I30 #!N 12. You can now save the header file you have defined. Select #!F-adobe-times-bold-r-normal--18* Save As... #!EF from the #!F-adobe-times-bold-r-normal--18* File #!EF pull-down menu. Save the file under any name you choose. Note: The data can now be imported by specifying this file name to an #!F-adobe-times-bold-r-normal--18* Import #!EF module. However, if the extension is not "general," you must specify "general" in the "format" parameter field of the #!F-adobe-times-bold-r-normal--18* Import #!EF configuration dialog box (see #!Ltcnfgbx,dxall61 h Controlling Inputs: Configuration Dialog Boxes #!EL ). #!N #!I30 #!N 13. In the initial Data Prompter window, note that the #!F-adobe-times-bold-r-normal--18* Test Import #!EF and #!F-adobe-times-bold-r-normal--18* Visualize Data #!EF buttons are now enabled. First choose #!F-adobe-times-bold-r-normal--18* Test Import #!EF . A window appears, displaying a description of the imported data. Now choose #!F-adobe-times-bold-r-normal--18* Test Import #!EF . A general purpose visualization program will be run on this data set. To view the program, choose Open Visual Program Editor from the Windows menu of the Image window. You can also experiment with changing the interactor settings in the control panel. #!N #!I0 #!N #!EF #!N #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next Topic #!EF #!N #!N #!Lall38,dxall39 h Example 2 #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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