Edits MD files.
MDE file KEYS=LIST
MDE file KEYS=DEL conditions
MDE file KEYS=REST conditions
MDE file KEYS=schema keys UNIT= VALU= conditions
Use command MDE to edit or restore MD files. If you delete a record accidentally, you can recover it with KEYS=REST provided you have not repacked the file.
MDE KEYS=DEL ROW=1 5 COL=15 20
This entry deletes columns 15 to 20 in rows 1 through 5.
MDE 6514 KEYS=LIST
This entry lists the keys for MD file 6514.
MDE KEYS=T TD VALU=MISS ID=KMSN TIME=12
This entry flags the temperature (T) and dew point (TD) as missing for Madison, Wisconsin, at 12 UTC.
Use the four commands below to edit a ship observation in MD file 6512.
MDU SET 6512
This entry sets the MD file pointer to 6512. All subsequent MD file commands are performed on this MD file.
MDE KEYS=T UNIT=C VALU=20 ID=KWPR TIME=12
This entry sets the search conditions ID=KWPR and TIME=12. MDE will locate ship ID KWPR at 12 UTC and change the temperature to 20° C.
MDE KEYS=DEL ROW=5 COL=10 15
This entry deletes the records at row 5 and columns 10 to 15.
MDE KEYS=REST ROW=5 COL=10
This entry restores the record at row 5 and column 10.