Discrete samples
This function will work with either time dependent or time independent discrete sample tables. This function creates a string file which contains a point for each row retrieved from the sample table.
To run this function: Choose Database > Extract > Discrete samples, or...
Fields on the Extract discrete sample data form.
Define the string file to be created
Enter the Location to define the string file which will be created by this function. Enter the String number to define the string to which the resultant data will be saved.
Define the discrete sample table to be processed
Enter the name of the time dependent discrete sample Table which is to be processed.
Table
Display only. This is the name of the table which is being processed.
Field Name
Enter the names of up to 10 fields from which values are to be extracted and stored in the string file which is created by this function.
Choose Apply to display the SELECT CONSTRAINTS FOR FIELDS form. Enter any query constraints required on this form and choose Apply to complete the function.
The string file which is created contains one point for each row which is retrieved from the sample table. The results are slightly different for time dependent and time independent tables. See the tables below for details of the results for the two different types of tables.
Time independent tables
| Field | Contains |
| Y | Sample point y value |
| X | Sample point x value |
| Z | Sample point z value |
| D1 | Sample identifier |
| D2 | First selected sample field |
| D3 | Second selected sample field, etc. |
Time dependent tables
| Field | Contains |
| Y | Sample point y value |
| X | Sample point x value |
| Z | Sample point z value |
| D1 | Sample identifier |
| D2 | Sample date expressed in yyyy-mm-dd hh:mm:ss format |
| D3 | First selected sample field |
| D4 | Second selected sample field, etc. |