iFFT is slow, if an entry is NaN

Similar Questions

• Entry of NaN to a subvi

  Hello

  I have a sub vi to discover the derivative that has got a double entry.

  The sub - vi is inside a while loop and go entry is a double value only. but inside the subvi is show an entry "NaN" and the slot that VI gives an output of "NaN".

  Thanks in advance

  Why don't do you your and our life easier by simply setting the real VI rather than a truncated image oversized?

  Since the same sub - VI is used in parallel on several different entries, you need to make it reentrant, otherwise you get only one instance NFB express VI internal and it will blur all, guaranteed!

  As I said before, I recommend to use the VI of ptbypt derivatives. That's all you need.

• FFT returns NaN, no error

  I am trying to trace the FFT of a certain number of waveforms, but I find that for some outputs simply return an array of "NaN" instead of the scale, with no indicated error. Looking at the data I see no significant difference that could cause this. anyone can shed light on the problem?

  I watched the formula apparently used by the FFT vi in aid detailed and created my own version, and he experiences the same problem with the same sets of data. Fathom what happens, it seems to descend to labview randomly taking one of my input data values and its reading like "NaN" - a bad size and TFF any fate of NaN. Why is reading that entry as NaN but is a mystery, and yet he does it regularly because the same plots always failed.

  I have attached the relevant vi to look, any help would be appreciated.

  You were asked to see if the data included NaN and you do not. The last element of the third data series is NaN. I haven't checked the other tables because it is something you need to do.

• Cell calculation is a bit slower

  Hi, I use Acrobat XI Standard to create a form.

  Name of the cell	Cell value
  A1	1
  A2	2
  A3	3
  A4	= A1 + A2 + A3

  For example, if I put 1 in cell A1 and A2 2 and 3 in A3, I want A4 to calculate A1 + A2 + A3 = 1 + 2 + 3 = 6. My problem is, when I put 1 in cell A1, A4 poster 0, when I then put 2 cell A2, A4 shows 1. Then I put 3 in A3, A4 shows 3 which is the sum of 1 + 2 (A1 + A2). The calculation seems to be a bit slower than my entry. So when I complete the entry, A4 shows 3 which should be 6. If I want to make it correct, I need to do another action, like putting 0 into another cell so A4 would calculate A1 + A2 + A3 instead of just A1 + A2.

  It happens to many columns and other columns are fine, I checked the settings and properties in both cells and they are the same, so I don't know how to do.

  My laptop is windows version 1511 10 pro, the CPU is Intel Core i7-5500U CPU @ 2.40 GHz 2.40 GHz. type system is 64-bit, x 64 processor operating system.

  Please let me know how to solve this problem. Thank you.

  This is a typical symptom of a wrong field calculation order. Then in the form of edit mode, select:

  Tasks > other tasks > set field calculation order

  and organize the fields in the logical order.

• iPhone WiFi 6 causes of network disruption

  There is an old (locked) topic that seems similar unanswered: iPhone WiFi broken MacBook WIRELESS

  In our House, we have:

  -Airport Extreme (v2)

  -MacBook Pro

  -MacBook Air

  -iPhone 6

  -iPhone 6s

  -iPads

  We have noticed recently that our Internet connection was really inconsistent.  After some time, we have done tests and concluded that when my wife turned on the wifi of iPhone 6, all other devices would have connectivity problems (slow, fall of entry and exit, etc.).  Turn it off, all right, turn it back on, everything is twisted.  We tried to look to see if all the apps were using a lot of data (pictures just Google had destroyed our wireless bill, so we removed that, but even with that gone, the question remained), but nothing was.  But even if I do a huge download or download on my laptop it does not cause these same questions, it seems to be a problem of low level network and NOT only volume of use.  Even with the updated iOS (9.3.2), the problem persists.

  Are there known problems or patches (which I don't see Google search) about the interruption of network iPhone?

  I've seen this problem posted here before with no clear resolution. The one feature that might explain it is prioritization of media on a router. However here is a user points to the problems of Wi - Fi. Suggest from the top and bottom. Maybe one of them will help you.

  (1) perform a forced reboot: hold the Home and Sleep/Wake buttons simultaneously for about 15-20 seconds, until the Apple logo appears. Leave the device to reboot.

  (2) resetting the network settings: settings > general > reset > reset network settings. Join the network again.

  (3) reboot router/Modem: unplug power for 2 minutes and reconnect. Update the Firmware on the router (support Web site of the manufacturer for a new FW check). Also try different bands (2.4 GHz and 5 GHz) and different bandwidths (recommended for 2.4 to 20 MHz bandwidth).

  (4) change of Google DNS: settings > Wi - Fi > click the network, delete all the numbers under DNS and enter 8.8.8.8 or otherwise 8.8.4.4

  (5) disable the prioritization of device on the router if this feature is available. Also turn off all apps to VPN and retest the Wi - Fi.

  (6) determine if other wireless network devices work well (other iOS devices, Mac, PC).

  (7) try the device on another network, i.e., neighbors, the public coffee house, etc.

  (8) backup and restore the device using iTunes (ask for more details if you wish).

  https://support.Apple.com/en-us/HT201252

  (9) go to the Apple Store for the evaluation of the material.

  Council: https://discussions.apple.com/docs/DOC-9892

• With the help of several outings on NI USB-6229

  Hello

  I have a question about the use of several output (input) on NI USB-6229. I request of programming where I use a few digital, digital inputs, outputs some analog outputs and inputs. Initialization of all the ports that I have in a Subvi, which lies in a loop for I control settings on the other for loop by using notifications. Problem is that this outpust is really slow (or reading entries), I want to say in my main loop I setting button, but it takes at least 1 s to change my outings (even with reading entries)? So I am wonderig what I am doing wrong. Can plesae you tell me what is the best way how to control several different ports?

  OK, so my whole program structure is like this:

  In primary Vi, I have a loop that subvis in other control loops. One of the Subvi is Subvi whichchange parameters at initialization Subvi. The structure on the photo. Please help me because I really don't know where is the problem. I use two converters AD / DA more and some machines that I am targeted by using the RS232 but it NEITHER original is the slowest.

  PS. If I turn on only parameter Subvi loop everythinf is much faster.

  OK problem with loops slow fixed http://forums.ni.com/t5/LabVIEW/Slow-parallell-loops-with-DAQ/m-p/1698988#M601731.

• Not a number/path/refnum simple Boolean?

  Y at - it an easy way for not a number/path/refnum return a single Boolean value telling if the entry had NaN // any where in its structure.

  I have a cluster of clusters of references I want to validate but I can't find an easy way to convert something that I can get a single Boolean of the structure. If only there wasn't a single cluster I would convert it the cluster in a table then or the elements of the array to see if it had references not valid.

  

  I did the examples above with NaN because it is easier to show than references.

  If I'm not mistaken, the in-memory representation for a cluster of clusters of Boolean data should be the same as a 1 d of Boolean array, so I think you should be able to type cast to a 1 d of Boolean array, you can then OR.

• Black screen, slow entry

  Updated Firefox to upgrade to v33.0. At that point, entered at the keyboard has become extraordinarily slow and the browser pane would go black (as others have pointed out) as well as drop down menus.

  I have disabled hardware acceleration, restarted and updated Intel HD 3000 graphics drivers without improvement. I can not reset as I use the Session Manager and don't want to lose the library of recorded sessions.

  At this point, I can't use Firefox. Is it possible to revert to a previous version to get up to speed?

  I use: WIndows 7 Pro SP1 64-bit, Dell Latitude E6420, i7-2769QM, NVIDIA NVS 4200 M.

  DV

  Hello

  A new version of Firefox was released, which solves the problem of black screen. Please download the latest version here, highlight your language of choice and operating system:

  • https://www.Mozilla.org/Firefox/all/

  Alternatively, if you're in Firefox and you will see your menus:

  • Help (or

    

    >

    

    ) > about Firefox

• Re: BIOS slow entry into force (POST) on Tecra M2

  All of a sudden my Tecra M2 very slow initialize the BIOS at startup,
  poster is empty, its takes about 5 to 10 minutes before the OS login screen appear

  I tried to remove the drive HARD, & CDROM, RAM (one at a time) and it seems no different

  Please help me.

  Hello!

  Have you tried to load the default settings in the BIOS? As far as I know, you can load with F9 and then reboot the laptop and maybe it works.

  You have external devices connected to the laptop as input devices, printer and so far? Delete them.

  In the worst case, there is a problem with the motherboard and BIOS and motherboard should be exchanged.
  But first of all, you can try to update the BIOS that you can find on the Toshiba site.

  Good bye

• Analysis.Math.Statistics fails when NaN values are included in the entry tables

  Hi all..

  With the help of Measurement Studio to Version 8.9 of .net. We need calculate statistics on a table that contains a double. NaN values. When I do this I get NaN as the result of any of the statistical methods (average, STDS etc.) ... Interestingly, the Math.ArrayOperations methods look like they work. Any ideas?

  Thank you

  gdssoftware

  Hi GDSSoftware,

  You see this behavior because the statistical functions with Measurement Studio ignore not input values NaN - that is why, they will return results NaN.  To work around this problem, you will need to filter these NaN values out of your input array before performing statistical analysis on this subject.

  If you're working with .NET 3.5 and later versions, you can do this by using the following:

  Double [] vals = new double [] {0d, 6 d, 10 d, 4 d, double. NaN};
  Double [] nanless_vals = vals. Where (d =>! double.) IsNaN (d)). ToArray();

  If you use an earlier version of the .NET framework, you will need to perform a loop on the table with the following (or something similar):

  Double [] vals = new double [] {0d, 6 d, 10 d, 4 d, double. NaN};
  List nanless_list As new List();
  for (int i = 0; i)< vals.length;="">
  If (! double.) IsNaN (vals [i]))
  nanless_list. Add (Vals [i]);
  Double [] nanless_vals is nanless_list. ToArray();

  I hope this helps!

  Kind regards

  Stephanie R.

  National Instruments

• How entry NaN in LV8.5

  I'm trying to turn empty waveform to make a chart seem to have 2 different colors, but I can't seem to enter NaN in my paintings.  I tried to use positive infinity, 1/0 and NaN in a digital constant, but they are all defaults to ~ 2.25E9.  If not, how can I do this?

  Are you sure that the representation for digital is set to double?  2.25 e9 is close to the limit of a whole of I32.  I have not had any problems with LV 8.5.1.  If I have a constant defined for I32 and enter NaN, it automatically converts the constant DBL.  If it is part of an array, it does not convert automatically.

• How can I check my computer for problems of slowing as unused process, invalid registry entries and unfavourable system settings?

  I would like to know how or where to go to check this issues. He came in trying to figure out hpqtra08.exe. That was supposed to be a safe process.

  He also says to ck on my computer for these questions, but I have no idea how. Some a plez would tell me? TIA

  I would possibly be able to understand why my computer is really really slow.

  Hello

  There are many things that will slow down the performance of your computer. Ex: Virus, dozens of applications installed on your computer, and too many temporary files.

  The application hpqtra08.exe is a HP Digital Imaging Monitor application.

  To improve the performance of your computer and solve the problems of slow performance, see the following suggestions.
  
  Open the troubleshooter of Performance
  Check for questions such as the number of users currently connected to the computer and if multiple programs are running at the same time
  

  http://Windows.Microsoft.com/en-in/Windows7/open-the-performance-Troubleshooter

  Open the troubleshooting of System Maintenance Utility
  Resolution of the problems of System Maintenance looking for unused files and shortcuts that you can clean or remove so that your computer can run faster

  http://Windows.Microsoft.com/en-in/Windows7/open-the-system-maintenance-Troubleshooter

  Optimize Windows 7 for better performance
  http://Windows.Microsoft.com/en-us/Windows7/optimize-Windows-7-for-better-performance

  
  

  CHKDSK WARNING: Running chkdsk on the drive if bad sectors are found on the disk hard when chkdsk attempts to repair this area if all available on which data can be lost.

  
  

  Anti Virus WARNING: The data files that are infected must be cleaned only by removing the file completely, which means that there is a risk of data loss.

  If you have additional problems, please reply to this post and we will be happy to help you further.

• A single user extremely slow entry response... can't type... seconds

  Dell XPS L701X Windows 7 SP1 64 bit OS Windows experience index IE9 6.9

  Problem: very slow (useless) response to the keyboard, the mouse on a user input

  Having extremely slow response using the browser on an account on my Dell XPS, which is not run as an administrator.  See for a few seconds, as you type, or can use side pull-down screens, etc...  Have run scans, deleted all the programs of extranious, rebooted, defrag'd, compared to run programs, between the work of user (run as admin)... all to no avail... any ideas on how to determine and solve this problem?

  Tried to use Safari instead of IE that works very well...   Enabled the GUEST account which is really crazy... creating a screen frozen with empty caption area Google and BING matter what cursor does not...

  Hello

  Welcome to the Microsoft community. According to the description of the Internet Explorer 9 works slowly in a user profile. Provide the following information:

  ·         You get the error message?

  ·         Did you do changes on the computer before the show?

  I'll help you with this problem. I suggest you follow these methods.

  Method 1: It could be a problem with the profile of the user. Follow the steps in the article to fix a corrupted user account.

  Difficulty of a corrupted user profile

  Method 2: Follow the steps in the article.

  Web page with complex graphics opens slowly in Internet Explorer 9

  Internet Explorer is slow? 5 things to try

  Note: Reset the Internet Explorer settings can reset security settings or privacy settings that you have added to the list of Trusted Sites. Reset the Internet Explorer settings can also reset parental control settings. We recommend that you note these sites before you use the reset Internet Explorer settings.

  I hope this helps. Let us know if you need help with Windows related issues. We will be happy to help you.

• slow boot with an error message after + "entry" does not work

  My Firefox opens not instantaneously, but after awhile, it displays a message that one of the scripts have dropped with options to continue or stop the script. After the opening of the main window there is a message that Firefox is unable to open the toolbar. 'Enter' does not work in the address bar after this question.

  Screenshot of the message: http://i1176.photobucket.com/albums/x322/mveits/Firefox/Capture.jpg

  I'll add more information on request.

  It is also indicative of a problem with an add-on. Use the method in the link I posted above to identify what is causing the problem.

• Mail too slow to use text entry!

  It's not constant, but sometimes I can not reply to an email because if I press a key for the letter he take a second to make it appear. If I check activity monitor nothing is presented as a problem, so I don't know what the problem is. I use OS 10.10.5 on my iMac.

  Any ideas?

  Run & view the results of etrecheck.  Maybe someone will spot something.

  https://www.etresoft.com/etrecheck