ADDVALUE function adds a value to a GTS, without checking for tick duplicates. The added data point is appended to the GTS.
SETVALUE overrides an existing value.
ADDVALUE function only works on GTS, not on lists of GTS like those generated by the use of
If you want to use
ADDVALUE after a
FETCH, you will need to extract the GTS from the list, for example by using
with value 0 as parameter.
If latitude or longitude are NaN (not a number), value has only timestamp, elevation, value. If elevation is NaN (not a number), value has only timestamp, latitude, longitude, value. If elevation is NaN and longitude or latitude are NaN, value has only timestamp, value.