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Everything posted by drjdpowell
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Has anyone had a chance to use teh new version? At least as far as trying the new examples.
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0.6.0 version now on VIPM: https://www.vipm.io/package/jdp_science_postgresql/ This involves significant improvements, as well as Examples that work with a public postgres server (and thus work without needing Postgres installed). I am hoping this is close to a 1.0 version.
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I have published a 0.3.1 package on VIPM.io with Antoine's changes (LabVIEW 2017). Then I've accepted your Pull Requests and published a 0.4.0 version as well (LabVIEW 2019): https://www.vipm.io/package/jdp_science_postgresql/
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VIs without Front Panels - or with several!
drjdpowell replied to GregSands's topic in LabVIEW General
I think your second point is wrong; VIs without the front panel loaded don't use any resources. EXEs don't even include the code for those front panels. -
I think this is a Windows touch-screen behaviour, due to Windows using press-and-hold to give a right click. Windows waits for the release before sending "mouse down" so it can decide to make it a right click or not. It's annoying but I have not found a way around this.
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Note the WITHOUT ROWID keyword also, as that could make a significant performance improvement with this kind of table.
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A non-JSON option you could try is: CREATE TABLE TestData ( Channel, Time, Data, -- individual reading at Time for Channel PRIMARY KEY (Channel,Time) ) WITHOUT ROWID This is every reading sorted by a Primary Key that is Channel+Time. This makes looking up a specific channel in a specific Time Range fast. BTW, you don't need to make an index on a Primary Key; there is already an implicit index . You would select using something like: SELECT (Time/60)*60, Avg(Data) FROM TestData WHERE Channel=? AND TIME BETWEEN ? AND 1717606846 GROUP BY Time/60
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Why don't you just try it? Open your SQLite viewer app if choice and execute "SELECT * FROM sqlite_schema"
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You're looking for the sqlite-schema table: https://www.sqlite.org/schematab.html
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SQLite Library Beta: Parameters in "Execute SQL"
drjdpowell replied to drjdpowell's topic in Database and File IO
Do you have the latest version of vipm? -
Yes, at some point I intend to make an interface that has "to JSON" and "from JSON" methods, that one can inherit from. But at the moment JSONtext is based in LabVIEW 2017.
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I will fix the inconsistance, either by making comlex numbers full not supported or fully supported.
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Can you give a more specific question?
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Not necessarily, but it is trickier than it looks because of those "multipoint paths" that unflatten does not support. A path like $.a.[new,old].b[4].c.d, for example. If all paths were straightforward like $.a.b.c.d then it would be easy. Although I use JSON for configuration, I'm not using it in the same way you are doing, so it hasn't motivated me to solve this issue. Sorry.
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See if "Unflatten JSONpath Array to Object" will do what you want. It will create the extra levels if needed.
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That vipm package seems to have gotten corrupted somehow. I'll contact NI about it. In the meantime, try getting it from here: https://forums.ni.com/t5/JDP-Science-Tools/Out-of-Memory-Error/m-p/4335019/highlight/true#M156
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Can you try forking the repo? Then making a pull request? I only have a free Bitbucket account and there is a limit on how many people I can add to my repos.
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I'm afraid I don't have an example. I did once prototype a version where I swapped out the flattened message format for one that used JSON (I recommend JSON as an easy, reliable format to go between languages).
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Where do y'all get your (free) artwork for UI elements?
drjdpowell replied to David Boyd's topic in User Interface
I use the "Advanced PNG Export" feature of https://pictogrammers.com/library/mdi/. This allows some customisation of icon (size, colour, transparency, border) before downloading. -
Where to put settings modules in my DQMH program?
drjdpowell replied to Nokaroa's topic in Application Design & Architecture
Why are you making Setting modules at all, rather than just having the other modules just read the INI file directly? This seems very over complicated. -
Program architecture
drjdpowell replied to Francois Aujard's topic in Application Design & Architecture
Quite a lot of good architectures are based on using messages between semi-independent modules, with the modules being based on a standardized template. There are a few such "frameworks" publicly available via vipm.io that you could look at. Mine is "Messenger Library", which has some instructional videos. -
I've long thought the Event API has bad naming. If the Event Reg Refnum was called "Event Queue" and the User Event was called "Event Generator", then it would be easier for people to understand it.
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Ethernet connection with LABView is insufficient
drjdpowell replied to Михаил Бабаев's topic in LabVIEW General
Maybe if you posted what device you are trying to talk to, and perhaps pointed to the manual, you might get better help. -
Did you do the Write? It only outputs on Write. I am considering having the Read write the Template, as it is confusing to have an empty file untill the Write happens.