dx-doc 1:4.4.4-9 / usr / share / doc / dx / help / dxall136

#!F-adobe-helvetica-medium-r-normal--18*
#!N 
#!CDarkGreen #!N  #!Rall135 Example 4. Handling Interspersed Text #!N #!EC 
#!N #!N The  #!F-adobe-times-bold-r-normal--18*   layout #!EF keyword is used to specify 
which locations in a data file are to be read, thereby 
avoiding interspersed text. In the example data file shown here, there 
are no implied connections between data values. #!N #!N #!I0 #!N 
 #!F-adobe-times-medium-r-normal--18*   #!N #!N #!I30 #!N 1. In the Data Prompter initial 
dialog box: #!N #!I0 #!N  #!F-adobe-times-medium-r-normal--18*   #!N #!N #!I30 #!N a. 
Select  #!F-adobe-times-bold-r-normal--18*   Grid or Scattered File #!EF , then select for 
scattered data (rightmost grid button). #!N #!I30 #!N b. Activate the 
 #!F-adobe-times-bold-r-normal--18*   Position #!EF toggle button. #!N #!I30 #!N c. Set  #!F-adobe-times-bold-r-normal--18*   
Number of variables #!EF to "1." #!N #!I30 #!N d. The 
data positions (latitude and longitude) are in the data file and 
are 2-dimensional: set  #!F-adobe-times-bold-r-normal--18*   Dimension #!EF to "2." #!N #!I30 #!N 
e. Activate the  #!F-adobe-times-bold-r-normal--18*   Columnar #!EF toggle button. #!N #!I30 #!N 
f. Click on  #!F-adobe-times-bold-r-normal--18*   Describe Data #!EF to bring up the 
simplified data prompter. #!N #!I0 #!N #!EF #!N #!N #!I30 #!N 
2. In the  #!F-adobe-times-bold-r-normal--18*   Data file #!EF field enter the path 
name: #!CForestGreen #!N #!N  #!F-adobe-courier-bold-r-normal--18*   #!N /usr/lpp/dx/samples/data/CO2fragment.lis #!EF #!N #!N #!EC 
#!N #!I30 #!N 3. Activate the  #!F-adobe-times-bold-r-normal--18*   Header #!EF toggle button, 
select the "String marker" option, and enter "CO2_CONC \n" in the 
associated text field. (Note that the marker text is the heading 
for the third column of data and that the reading of 
data will start after the new-line character, at the point marked 
by "  #!F-adobe-times-bold-r-normal--18*   * #!EF " on the following line. See 
also Step 6 of Example 7 in  #!Lsvarx86,dxall122 s Enter "Time Step 1 \n"  #!EL  .) Note: The 
asterisk (  #!F-adobe-times-bold-r-normal--18*   * #!EF ) at the beginning of the 
first data line and the interval scale following the data are 
for reference purposes only and do not appear in the actual 
file (see Steps 3 and 5f-j in this example). #!CForestGreen #!N 
#!N  #!F-adobe-courier-bold-r-normal--18*   #!N #!N VARIABLES AND SPECIFIED RANGES #!N _________________________________________________________________________ #!N 
EPOCH 01-Jul-1983 00:00:00.000 31-Dec-1987 00:00:00.000 #!N LATITUDE -90.00 90.00 #!N LONGITUD 
-180.00 180.00 #!N CO2_CONC -10000.0 10000.0 #!N #!N EPOCH LATITUDE LONGITUD 
CO2_CONC #!N  #!F-adobe-times-bold-r-normal--18*   * #!EF 01-Jul-1983 00:00:00.000 -37.95 77.53 341.4 #!N 
01-Jul-1983 00:00:00.000 -89.98 -24.80 341.0 #!N 01-Jul-1983 00:00:00.000 -7.92 -14.42 343.4 
#!N 01-Jul-1983 00:00:00.000 -40.68 144.68 -100.0 #!N 01-Jul-1983 00:00:00.000 19.52 -154.82 
341.9 #!N 01-Jul-1983 00:00:00.000 -14.25 -170.57 342.0 #!N 01-Jul-1983 00:00:00.000 2.00 
-157.30 -100.0 #!N 01-Jul-1983 00:00:00.000 55.20 -162.72 335.3 #!N 01-Jul-1983 00:00:00.000 
-75.67 -27.00 341.7 #!N 01-Jul-1983 00:00:00.000 -43.83 -172.63 341.3 #!N 01-Jul-1983 
00:00:00.000 25.67 -80.17 343.8 #!N 01-Jul-1983 00:00:00.000 -4.67 55.17 339.1 #!N 
01-Jul-1983 00:00:00.000 13.43 144.78 344.0 #!N 01-Jul-1983 00:00:00.000 19.53 -155.58 343.5 
#!N 01-Jul-1983 00:00:00.000 76.23 -119.33 339.8 #!N 01-Jul-1983 00:00:00.000 40.05 -105.63 
339.5 #!N 01-Jul-1983 00:00:00.000 66.00 2.00 338.7 #!N 01-Jul-1983 00:00:00.000 -64.92 
-64.00 341.4 #!N 01-Jul-1983 00:00:00.000 71.32 -156.60 340.1 #!N 01-Jul-1983 00:00:00.000 
17.75 -64.77 342.3 #!N 01-Jul-1983 00:00:00.000 38.75 -27.08 341.1 #!N #!N 
 #!Rdbrintv #!N  #!F-adobe-times-bold-r-normal--18*   #!N |-----------skip 33-------------| width 12 | width 12 
| width 10 #!N #!EF #!N #!EF #!N #!N #!EC #!N 
#!I30 #!N 4. Enter "21" in the  #!F-adobe-times-bold-r-normal--18*   # of points 
#!EF field. #!N #!I30 #!N 5. Use the  #!F-adobe-times-bold-r-normal--18*   layout #!EF 
option to "skip" interspersed text: #!N #!I0 #!N  #!F-adobe-times-medium-r-normal--18*   #!N #!N 
#!I30 #!N a. Select  #!F-adobe-times-bold-r-normal--18*   Full prompter #!EF from the  #!F-adobe-times-bold-r-normal--18*   
Options #!EF menu. #!N #!I30 #!N b. Select "locations" in the 
 #!F-adobe-times-bold-r-normal--18*   Field list #!EF of the Data Prompter. #!N #!I30 #!N 
c. Activate the  #!F-adobe-times-bold-r-normal--18*   Layout #!EF toggle button (in the right-hand 
panel of the prompter). #!N #!I30 #!N d. Bring up the 
Browser for the data file by clicking on the ellipsis button 
(  #!F-adobe-times-bold-r-normal--18*   ... #!EF ) next to the  #!F-adobe-times-bold-r-normal--18*   Data file 
#!EF field. #!N #!I30 #!N e. Click on  #!F-adobe-times-bold-r-normal--18*   Browser... #!EF 
to view the data file. #!N #!I30 #!N f. In the 
data file, position the cursor at the beginning of the first 
data value in the first data line (-37.95) and note the 
 #!F-adobe-times-bold-r-normal--18*   Byte Offsets #!EF value (counting from the start of the 
line). Enter this number (33) in the  #!F-adobe-times-bold-r-normal--18*   skip #!EF field 
of the  #!F-adobe-times-bold-r-normal--18*   Layout #!EF option. #!N #!I30 #!N g. Enter 
the value "12" in the  #!F-adobe-times-bold-r-normal--18*   width #!EF field of the 
 #!F-adobe-times-bold-r-normal--18*   Layout #!EF option. Since the latitude-longitude pairs are 2-vectors, the 
Data Prompter will read the specified width  #!F-adobe-times-medium-i-normal--18*   twice #!EF in 
succession, once for each component. (Thus, the Data Prompter skips 33 
characters, reads 12 characters, and then reads 12 more, as specified 
by the first  #!F-adobe-times-bold-r-normal--18*   layout #!EF settings. See the marked intervals 
at the bottom of the data file in  #!Ldbrintv,dxall136 s skip 33  #!EL  .) #!N 
#!I30 #!N h. To confirm these changes, click on  #!F-adobe-times-bold-r-normal--18*   Modify 
#!EF at the bottom of the panel. #!N #!I30 #!N i. 
Select "field0" in the  #!F-adobe-times-bold-r-normal--18*   Field list #!EF and rename it 
"CO2_concentration." #!N #!I30 #!N j. Enter the value "0" (zero) in 
the  #!F-adobe-times-bold-r-normal--18*   skip #!EF field and "10" in the  #!F-adobe-times-bold-r-normal--18*   width 
#!EF field. (Now the Data Prompter skips zero characters and then 
reads 10 characters. See the marked intervals at the bottom of 
the data file in  #!Ldbrintv,dxall136 s skip 33  #!EL  .) #!N #!I30 #!N k. To 
confirm these changes, click on  #!F-adobe-times-bold-r-normal--18*   Modify #!EF at the bottom 
of the panel. #!N #!I0 #!N #!EF #!N #!N #!I30 #!N 
6. 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 
#!N #!N #!CForestGreen #!N  #!F-adobe-courier-bold-r-normal--18*   #!N file = /usr/lpp/dx/samples/data/CO2fragment.lis #!N points 
= 21 #!N format = text #!N interleaving = field #!N 
header = marker "CO2_CONC \n" #!N field = locations, CO2_concentration #!N 
structure = 2-vector, scalar #!N type = float, float #!N layout 
= 33, 12, 0, 10 #!N #!N end #!EF #!N #!N 
#!EC #!N #!N #!N  #!F-adobe-times-medium-i-normal--18*   Next Topic #!EF #!N #!N  #!Lall136,dxall137 h Example 5. Time Series with Interspersed Text  #!EL  
#!N  #!F-adobe-times-medium-i-normal--18*   #!N