Jump to content

gyc

Members
  • Content Count

    24
  • Joined

  • Last visited

Community Reputation

0

About gyc

  • Rank
    Active

Profile Information

  • Gender
    Not Telling

LabVIEW Information

  • Version
    LabVIEW 2012
  • Since
    1996

Recent Profile Visitors

1,136 profile views
  1. Not arguing, just learning (always learning). Excellent implementation, btw!
  2. Exactly, but I find it difficult to 'split' the figure into rectangles. What I thought of is to split it into triangles, of which one vertex is the center of mass of the figure itself. (good old romans already did that!)
  3. Accurate: not a problem. It depends on how many (x,y) points i have, so I can control that beforehand. Floodfill: I am not working with images/pixels. (x,y) are actual floating point values in a measurement space. This is green theorem (which in turn is a particular case of Kelvin-Stokes) but I can't seem to find anything in LV help.
  4. Hi there. I need to compute the area within a closed shape (on XY plane) defined by an array of XY points (XY graph). Can't find anything for labview related to this. (not using Vision, of course) "splitting" the curve in two halves, integrating both along the diving (straight ) line and subtracting the resulting areas does not always yield a correct result because the shape may not always perfectly regular (check picture). Any suggestions?
  5. Thanks, I had seen that too. Not that it is technically difficult, it's just quite long...
  6. As many may know, Q-DAS has established a de-facto standard for statistical quality control data exchange (files .dfq, .dfx., .dfd) Is there, somewhere, a vi to write data to file in this fomat? Cheers
  7. Hello all. I need to deploy an application that uses an USB DAQ device. The customers are not NI/LabView savvy, so NIDAQmx installation must be pre-defined and "silent", i.e., requiring no user interaction at all (I have already created a specfile for that). Now the questions: 1)when creating the application installer in the project, how do I specify to install NIDAQmx with a specfile and other options? 2)can NIDAQmx be installed by a computer user without admin previleges(I am deploying version 8.9.5) ? Thanks. G.
  8. As ShaunR pointed out, 20000 points are too much to display - simply there are no monitors with that many pixels. Furthermore, the human eye will see as continuous anything refreshed faster than 16 Hz, so it's pointless to update the display at any faster rate than that - it's simply a waste of time and valuable computer resources. Except for very display sensitive applications (multi-media, simulation and very few others) simply just use the most practical method to display for your case (refs, sub-panels, queues, globals, functional globals, etc., it depends on what you're doing and how), decimate data AND updated displays only every 60 msec - 50 if you really cannot settle for less - but even 100 msec should be enough.
  9. How else can a chunk of data be "tied" to a piece of hardware? In that data there must be "something" specific of that hardware, that does not change with platform, with OS and cannot be easily tweaked by a smart user... Of course they will not tell!... although secrecy is the worst method for security. Sooner or later (usually sooner) that information leaks out and for all those relying on it it's "duck open season".
  10. Not quite what I'm looking for. The idea is to turn common USB flash drives into security dongles. I've seen some discussions and some code samples around. I just haven't yet had the time to look into it. And someone else is already doing it: http://www.alkonost.com/antiduplicate/ G.
  11. Super!!! Thanks. If you happen to dig it up again, pls drop a line! Thanks again. G.
  12. Not fool-proof is exactly the problem. However the API is quite interesting. Any chance you have a pre-2009 version lying around? (8.x would be nice!0 Tha is also prone to change. I need to get the HW serial number from the chip. I have seen posts about it and some talk about example code, that's why I thought someone in the LV sphere could have already done it. G.
  13. Thanks Rolf. It's not that I did not search for the info. I did and I had come across that page, but after reading 3/4 of it it seemed that it was all about creating a server and had no info on how to call it from another language - which is absolutely congruent with its title. So I just quit reading and - obviously - missed the last paragraph. The information is mixed and lies in a single 2 line paragraph at the very end of the page. I would think that maybe that is not the best way to present and - mainly - find it. Probably, it would be useful to have one page dedicated to calling an LV built ActiveX server from other languages (VB, C++, Delphi, etc) with the 'right' title. G.
  14. Hi. I have an application built in LabView that a customer asked to "control" via ActiveX. I built it with "AcitveX tick" enabled and tested it with an LV client and it works like a charm! As it turns out, although the customer develops his own sw in Visual Basic, they don't know how to "connect" to my ActiveX server. (apparently, they only know how to use ActiveX controls) Since my knowledge of VB is also very limited, is there anyone that can send me a skeleton example of how to connect to an ActiveX server (developed in LV, although I'd think that's not important), write to a control and read from an indicator? Do they have to "do something" in their VB development environment so that they "see" my server? Maybe some of you would direct me to a VB forum, but since I lack VB expertise to know how much this could be LV specific, I preferred to start here. Thanks. G.
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.