#!F-adobe-helvetica-medium-r-normal--18* #!N #!CDarkGreen #!N #!Rmltvrx6 Example 6. Deformed (Warped) Regular Grid #!N #!EC #!N #!N A deformed regular grid (sometimes referred to as a warped grid) is one in which the positions are irregular but the connections are regular. In this example the grid is 5 * 4. The data consists of three records, the first two of which contain scalar data defined on the grid. The third contains 2-vector values defining the grid positions. The Data Prompter uses the reserved word #!F-adobe-times-bold-r-normal--18* locations #!EF as a field name for the x,y values of the grid positions. The data file contains no descriptive information. #!N #!I0 #!N #!F-adobe-times-medium-r-normal--18* #!N #!N #!I30 #!N 1. In the Data Prompter initial dialog box, click on #!F-adobe-times-bold-r-normal--18* Grid or Scattered File #!EF , then on the button representing deformed data (third from the left) in the row labeled #!F-adobe-times-bold-r-normal--18* Grid type #!EF . #!N #!I30 #!N 2. Set #!F-adobe-times-bold-r-normal--18* Number of variables #!EF to "2." #!N #!I30 #!N 3. Step 1 automatically activates the #!F-adobe-times-bold-r-normal--18* Positions in data file #!EF toggle button (the positions of warped regular data are assumed to be listed in the data file) and displays a #!F-adobe-times-bold-r-normal--18* Dimension #!EF stepper button. Set the #!F-adobe-times-bold-r-normal--18* Dimension #!EF value to "2" for 2-dimensional (x,y) data. . #!N #!I30 #!N 4. For #!F-adobe-times-bold-r-normal--18* Data organization #!EF , confirm that the #!F-adobe-times-bold-r-normal--18* Block #!EF (i.e., record) toggle button is activated. #!N #!I30 #!N 5. Click on #!F-adobe-times-bold-r-normal--18* Data Prompter #!EF to bring up the simplified data prompter. #!N #!I30 #!N 6. Enter the path name of the data file in the #!F-adobe-times-bold-r-normal--18* Data file #!EF field: #!CForestGreen #!N #!N #!F-adobe-courier-bold-r-normal--18* #!N /usr/lpp/dx/samples/data/record_deformed #!EF #!N #!N #!EC #!N #!I30 #!N 7. Enter the values "5," and "4," in that order, in the first two #!F-adobe-times-bold-r-normal--18* Grid size #!EF fields. #!N #!I30 #!N 8. Confirm that #!F-adobe-times-bold-r-normal--18* Data format #!EF , #!F-adobe-times-bold-r-normal--18* Data order #!EF , and #!F-adobe-times-bold-r-normal--18* Vector interleaving #!EF are set respectively to Text, Row, and record-vector (X[0]Y[0], X[1]Y[1], ...). #!N #!I30 #!N 9. In the #!F-adobe-times-bold-r-normal--18* Field list #!EF , click on "locations" and use the "Move field" stepper arrows to position it after "field1" (i.e., at the bottom of the list). This change is necessary to reflect the actual data file, where the two scalar fields precede the x,y positions. (By default, the Data Prompter lists "locations" as the first field.) #!N #!I30 #!N 10. Click on "field0" in the list and then change the name to "rainfall" in the #!F-adobe-times-bold-r-normal--18* Field name #!EF field. To confirm this change, click on #!F-adobe-times-bold-r-normal--18* Modify #!EF at the bottom of the dialog box (note the instruction there). #!N #!I30 #!N 11. Now change "field1" to "temperature" and the #!F-adobe-times-bold-r-normal--18* Type #!EF option from "float" to "int" (the temperature values are integers). These changes can be confirmed together by clicking on #!F-adobe-times-bold-r-normal--18* Modify #!EF at the bottom of the panel. #!N #!I30 #!N 12. Save the header file (Step 10 of Example 1 in #!Lex1a,dxall116 s To save the header file #!EL ), which should look like: #!N #!I0 #!N #!EF #!N #!CForestGreen #!N #!N #!F-adobe-courier-bold-r-normal--18* #!N file = /usr/lpp/dx/samples/data/record_deformed #!N grid = 5 x 4 #!N format = text #!N interleaving = record-vector #!N majority = row #!N field = rainfall, temperature, locations #!N structure = scalar, scalar, 2-vector #!N type = float, int, float #!N dependency = positions, positions, positions #!N #!N end #!EF #!N #!N #!EC #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next Topic #!EF #!N #!N #!Lall129,dxall130 h Example 7. Scattered Data #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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