I downloaded from Yahoo few years of a daily stock time series.
Before storing them into a singular yearly files, i cleaned them from
the "ghost data".
Maybe you knows, sometimes, Yahoo downloaded files shows data also when
markets are closed (e.g. 2016-01-01 for italian markets).
After the cleaning I tried to join two files (years) with the "append"
command (it does not matter by terminal, script or graphic interface).
I had no result (no appending) but i had a "success message" in a
dialog box (while using the graphic interface) and no clear error
message using terminal or script.
"append" seems not working with "cleaned" files (but of course in a
different situation "append" works fine) .
So I suppose there is a kind of default data integrity control.
I havent studied yet the "join" command so may be this problem is
solvable in others ways but I ask if i have chance to append my files
and if I am not wrong I suggest, for the next releases
a) a better failure message for this case of the "append" command;
b) an option to "force" the appending of apparently non contiguous
c) a possibility of managing data to insert back the cleaned data. I
tryed to insert a 2016-01-01 (ghost) value but i was unable to keep it
at the top of the data.
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