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Official Q Language Reference Manual?

I have the Q For Mortals book and Q-Tips, but was wondering if there is any official Q Language Reference Manual that covers the behavior of the language in a more complete fashion. To me these two books are relatively good tutorials, but are not def...

A Question About Indexing With Nulls

Nulls under the cover must be treated as a "special value" in that you cannot do arithmetic on them, but interestingly enough you can do comparisons--where 0N is treated as the smallest number even less than -0W (0N < -0W). Is this by definition or b...

badmsg contents

I'm trying to debug a IPC client application that is causing tick.q tothrow 'badmsg. On the wiki, I see an old reference to a ""function that is called when a malformed data structure is received andsets the "msg" global variable with the conten...

Subtract a running value from the top of a column

Hello, does anyone know how to do the following?I have a column x--561020and I want to subtract 14 for examplex--5 --> remaining is greater than row value, 14-5 leaves 96 -> remaining is greater than row value, 9 - 6 leaves 310 -> remaining is less t...

Storing Price + Fundamental Data

I'm fairly new to databases. My current system uses hdf5 and is really starting to hit its limit.I have roughly 15 years of data for 1000 securities. Each security has ~100 fields of varying frequency:Daily: Open, Close, Adjusted close, Volume, VWAP,...