#!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 /opt/local/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 = /opt/local/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 

