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PA-Paul

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About PA-Paul

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    Dorchester, Dorset, UK

LabVIEW Information

  • Version
    LabVIEW 2016
  • Since
    2004

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  1. As a developer using open source code, I want to be able to inspect and run the unit tests/verification steps etc that were used to prove the code works as intended before release.
  2. So, does this sound like a sensible way to evaluate which option (expressing the X values for my interpolation in Hz or MHz) provides the "best" interpolation: Generate two arrays containing e.g. 3 cycles of a sine wave. One data set is generated with N samples, the other with 200xN samples. Generate two arrays of X data, N samples long, one running from 0 - N and the other running from 0 to N E6 Generate two arrays of Xi data - 200xN samples long, again with one running from 0-N and the other from 0 to N E6 Perform the interplolation once for each data set using the N samp
  3. Thought I posted this the other day, but apparently didnt. I agree it's likely a precision/floating point thing. The issue I have is how it tracks through everything. So the interpolation is used to make the frequency interval in our frequency response data (for our receiver) match the frequency interval in the spectrum (FFT) of the time domain waveform acquired with the receiver. We do that so we can deconvolve the measured signal for the response of the device. We're writing new improved (and tested) version of our original algorithm and wanted to compare the outputs of each. In the new one,
  4. Hi All, This may be a maths question, or a computer science question... or both. We have a device frequency response data set, which is measured at discrete frequency intervals, typically 1 MHz. For one particularly application, we need to interpolate that down to smaller discrete intervals, e.g. 50 kHz. We've found that the cubic Hermite interpolation works pretty well for us in this application. Whilst doing some testing of our application, I came across an issue which is arguably negligible, but I'd like to understand the origins and the ideal solution if possible. So
  5. Unfortunately, even with debug enabled you cant probe the class wire (Well, actually you can but all you get is the class name, not the private data). At least that is the case on VIs within the PPL (so if you try to probe the class wire on the BD of a VI within the packed library all you get is the name of the class. I'm pretty sure the same is true in the calling code once the class wire has "been through" a VI from the PPL. Paul
  6. Not sure where this question best fits, it could have gone in application design and architecture (as I'm using the PPL based plugin architecture), or possibly OOP as I'm using OOP... Anyway, I have made an interface class for my plugin architecture, put it in a library (.lvlib) and then packed that library (to PPL - .lvlibp) for use in my application. My question is relatively simple, why, when I look at the class within the packed library, is there no sign of the "class.ctl" (i.e. the class private data control)? Related - is the lack of class private data control within the PPL
  7. Thanks Tim, What I find strange is that on a fresh windows 7 install, the installer built with LV tells me I need first to install .NET4.6.1 and then does it. Why cant it do something similar in windows 10 and alert me to the fact that .NET installs are needed and do those for me! Ho hum, another reason (asside from DAQmx 16 no being compatible with LV2012) to think about migrating up to a newer version! Thanks again Paul
  8. Hi All, I have an application built in labview 2012 which we have been distributing fine with an installer built in labview 2012 for some time. Recently, a colleague tried to install the application onto a windows 10 machine and although the installation process seemed to go smoothly, for some reason, one of the two exe's distributed by the installer gives me the ever so helpful "This VI is not executable. Full development version is required. This VI is not executable. Full development version is required. This VI is not executable. Full development version is required. This VI is not e
  9. Background: Precision Acoustics Ltd have been at the forefront of the design, development and manufacture of ultrasonic measurement equipment for over 25 years. The company specialises in the research and development of ultrasonic test equipment used extensively in the QA of medical devices, to provide industry with ultrasonic Non Destructive Examination (NDE) and within academia and national measurement institutes throughout the world. Brief: Together with the Bournemouth University we are looking for a Software Engineer to work on a joint project focused on the developmen
  10. As a company we've been using labview for a while to support various products, and now we're going to be trying to improve our work by implementing more of a collaborative approach to roll out some new versions. But we're not traditionally a "software company" so are starting to look at how we can do this from a "process" point of view, so I was just wondering if anyone here has any particular hints/tips or advice for where team members may be working on the same bits of code, how to avoid conflicts etc etc. IF there's any useful literature or resources that may give some insight into this are
  11. New job opening for a graduate computer scientist for a software architect role on a "Knowledge Transfer Partnership" between Precision Acoustics Ltd (www.acoustics.co.uk) and Bournemouth University in the UK. Looking for someone with LabVIEW experience. Job advert and details here: http://www.bournemouth.ac.uk/jobs/vacancies/technical/advert/fst102.html Salary will be £26,000.00 per annum Precision Acoustics require a dedicated IT Software Architect to join their team on a specialised project. Precision Acoustics manufactures ultrasonic measurement products for medical and NDT indu
  12. Thanks for the answers. Had a suggestion from someone else which I'll try - he has a small dellXPS 13, but sets the resolution down to 1600x900 and then runs at 100% scaling instead of going for full resolution and scaling up... I dont think it sounds the ideal solution, but I'll give it a try. Thanks Paul
  13. Hi All, Wasnt overly sure where to ask this... I'm having issues related to screen resolution, but mostly to do with block diagram behaviour rather than front panel object sizing which comes up regularly! Anyway, I have some code which I wrote on my PC (windows 7.1) at the office - screen resolution is 1680x1050. When I look at the BD on that PC, things line up nicely and look generally ok. However, when I open the same code on my MS Surface Pro 3, (windows 8.1, screen res 2160x1440 - and with scaling set to 125% in the control panel display options) it seems that different things on t
  14. Does anyone know if there's a way to get the value of a position along a slide control based on mouse co-ordinates? For example, the waveform graph has an invoke node which will "Map Coords to XY" I'm after a similar functionality but for a slide control so that I can either prevent unwanted clicks in a certain region of the slider (i.e. I have a 2 slide control and want to either filter out any clicks that fall outside of the region between the sliders, or switch the active slider to be the one closest to the click before the click is processed). I put a slightly more detailed (comp
  15. Thanks for the link, feels a bit kludgy to me, I think I will just aim to not allow the VIs to be stopped from within the panel! Is it considered good practice to remove a VI from a subpanel before putting something else in? It seems you don't need to, but would be good know the best way! Thanks Paul
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