Do you know a VI to detect numerical zeros in a graph?

I need to detect numerical zeros in a graph and I don't know the analytical formula of the function represented on the graph.

If you just want to detect zeros in the array that represents the graph just search the array for zeroes...However if you want to detect zero crossings you can do it as described here:
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HOID=5065000000080000008B2B0000&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0&USEARCHCONTEXT_QUESTION_0=Zero+crossing&USEARCHCONTEXT_QUESTION_S=0
A similar example can be found on:
http://sine.ni.com/apps/we/niepd_web_display.DISPLAY_EPD4?p_guid=B123AE0CB8F6111EE034080020E74861&p_node=DZ52028&p_submitted=N&p_rank=&p_answer=&p_source=External
Or if it fits you task; use the in-build zero crossing point by point detector that comes with LabVIEW...
If you do it by detecting changes in sign you can interpolate
between the two points to find the exact position of the crossing. Attached is an example that does just that.
MTO
Attachments:
zerocrossing_Interpolated.llb ‏22 KB

Similar Messages

  • Hi, do you know if I can get a Macbook Pro with a numeric keyboard ?

    Hi, do you know if I can get a Macbook Pro with a numeric keyboard ?

    Use this to remap:
    http://pqrs.org/macosx/keyremap4macbook/index.html
    Or get something like this:
    http://www.powermax.com/parts/show/cro-43039?utm_source=Google%2BProduct%2BSearc h&utm_medium=Referral&utm_campaign=Google%2BProduct%2BSearch&src=g&gclid=CN3oouz x6bMCFRQcnAodYhwAyg

  • DID YOU KNOW ?? - Number Converters?

    Hi All,
    DID YOU KNOW??
    That the Creator IDE provides a set of converters that you can use to convert component data. If your input field is for numbers, then you most likely need a converter. Converters are also good for formatting dates, times, and currency values. The standard converters, which you can use are located in the Converters section of the Components Palette.
    The Number Converter
    Is a type of converter that Converts between java.lang.String values in your component properties and data types of java.lang.Number. The conversion usually applies to the property a component uses to display values and to pick up values entered by users. For example, the Text Field component uses the text property for this purpose.
    The Number Converter returns a Long if possible (within the range [Long.MIN_VALUE, Long.MAX_VALUE] and with no decimals), otherwise a Double. If you need the converter to return a numerical type other than Long or Double, or you need to narrow the choice to a specific type. The other lists of converters to choose from include Big Decimal Converter, Integer Converter, Long Converter, Float Converter, Long Converter, Short Converter and Double Converter.
    When you bind a component, the IDE normally identifies the data type for you and sets the appropriate converter when you establish a binding to the value property. However, you can also add a converter manually by setting the component's converter property.
    We would like to know the following from you :-
    1) Why and How are you using Converters in applications you are building?
    2) Did you face any challenges while using them?
    3) Did you find any cool ways of using these or build any cool custom converters?
    4) Any feedback you might want to share about converters to make it easier in using them.
    Thanks for all your inputs and for joining in the discussion.
    (Note :- This is the continuation of the Threadinar Series - see index at
    http://forum.java.sun.com/thread.jspa?threadID=5103424)
    K

    I'm having problems converting from text input with a NumberConvertor back to text. I'm trying to take a pay amount, annualize it (x * 24), and convert it back to text for a database query. I got the following to work, but is there a better way?
    Input field is "grossPay", output is "apay".
    public String button1_action() {
    Number n = (Number) grossPay.getValue();
    float f = n.floatValue() * 24;
    apay.setText("" + f);
    return null;
    }

  • Do you know how to use Flash? can you help?

    hi all,
    Do you know how to use Flash?
    I have been trying for months to find someone who can use
    flash, who can help me, with no luck.
    I need my links on my website updating, just a couple of them
    need the text changing as i need
    to change the name/title of some pages. I have tried to do it
    myself (using a trial version of flash,
    as i dont have flash). the site was made using dreamweaver.
    the files are .FLA
    and before anyone says 'get the person who made the site to
    do it'....He wont, ive tried.
    when i tried to change them myself i cocked them up and now
    they dont work at all, see my
    website and you will see; www.stevenallenphotography.co.uk
    so, if you can use flash please can you help me? all i need
    doing is the file updating with some
    of the link titles/names changing, i.e. one link is
    'exhibitions' which needs changing to 'published work',
    please get in touch if you can help.
    thanks,
    steven.

    I used divx in my site once its really very nice! but i use it in different host not .mac...try this divx web player with video selector code --------<object id="ie_plugin" classid="clsid:67DABFBF-D0AB-41fa-9C46-CC0F21721616"
    width="640" height="480"
    codebase="http://go.divx.com/plugin/DivXBrowserPlugin.cab">
    <embed id="np_plugin" type="video/divx"
    width="640" height="480"
    pluginspage="http://go.divx.com/plugin/download/">
    </embed>
    </object>
    <script type="text/javascript">
    // This code detects which browser we are
    // running into (IE or others) and assigns
    // the correct element (object or embed) to
    // the "plugin" variable, that we will use.
    var plugin;
    if(navigator.userAgent.indexOf('MSIE') != -1)
    plugin = document.getElementById('ie_plugin');
    else
    plugin = document.getElementById('np_plugin');
    // This is a local JS function used by our form
    // element to call the plugin functions using
    // the "plugin" variable that we defined above
    function openNewMovie()
    var url = document.forms['videoSelector'].movie.value;
    if(url != '')
    plugin.Open(url);
    </script><form name="videoSelector">
    Choose a video to play:
    <select name="movie" onChange="javascript:openNewMovie();">
    <option value="" selected>Video Selector
    <option value="http://www.yourdomain.com/folderdivx/name.divx">title1 divx
    <option value="http://www.yourdomain.com/folderdivx/name.divx">title2 divx
    </select>
    </form> ---------------------
    Hope this help!

  • Do you know how to sort all except one column?

    I implement the Comparator interface tosort the rows in my table.
    The last row is a totals row which i want to keep at the bottom always.
    Do you know how to do that?
    Thanks,
    Zeke

    How can I do that without making the data look funny?
    My Comparator class has a compare method that takes
    the two Objects that make up the table data to compare
    them. It looks for column that was picked for sorting and
    compares the values. Some of the columns contain String
    data and some contain Double data.
    So for example if I am comparing two Doubles and one of
    them happens to be the value for the totals row how can I
    detect this?
    Thanks,
    Zeke

  • Do you know what's inside? (N200-0769​)

    If so, I would like to know which clock-generator and sensor-chip it use?
    Message Edited by m99 on 11-09-2008 07:08 AM

    Hi I own a N200 (0769-BAG) and my sensor-detect script (from a Fedora installation) has produced the following sensor config file. Maybe it will be of some use ?
    ==================================================​======
    Stopping lm_sensors:                                       [  OK  ]
    # sensors-detect revision 5249 (2008-05-11 22:56:25 +0200)        
    This program will help you determine which kernel modules you need
    to load to use lm_sensors most effectively. It is generally safe 
    and recommended to accept the default answers to all questions,  
    unless you know what you're doing.                               
    We can start with probing for (PCI) I2C or SMBus adapters.
    Do you want to probe now? (YES/no):                      
    Probing for PCI bus adapters...                          
    Use driver `i2c-i801' for device 0000:00:1f.3: Intel 82801H ICH8
    We will now try to load each adapter module in turn.
    Module `i2c-i801' already loaded.                  
    If you have undetectable or unsupported I2C/SMBus adapters, you can have
    them scanned by manually loading the modules before running this script.
    To continue, we need module `i2c-dev' to be loaded.
    Do you want to load `i2c-dev' now? (YES/no):      
    Module loaded successfully.                       
    We are now going to do the I2C/SMBus adapter probings. Some chips may
    be double detected; we choose the one with the highest confidence   
    value in that case.                                             ​    
    If you found that the adapter hung after probing a certain address, 
    you can specify that address to remain unprobed.                    
    Next adapter: SMBus I801 adapter at 1c20 (i2c-0)
    Do you want to scan it? (YES/no/selectively):  
    Client found at address 0x50                   
    Probing for `Analog Devices ADM1033'...                     No
    Probing for `Analog Devices ADM1034'...                     No
    Probing for `SPD EEPROM'...                                 Yes
        (confidence 8, not a hardware monitoring chip)            
    Probing for `EDID EEPROM'...                                No
    Client found at address 0x52                                  
    Probing for `Analog Devices ADM1033'...                     No
    Probing for `Analog Devices ADM1034'...                     No
    Probing for `SPD EEPROM'...                                 Yes
        (confidence 8, not a hardware monitoring chip)            
    Probing for `EDID EEPROM'...                                No
    Some chips are also accessible through the ISA I/O ports. We have to
    write to arbitrary I/O ports to probe them. This is usually safe though.
    Yes, you do have ISA I/O ports even if you do not have any ISA slots!  
    Do you want to scan the ISA I/O ports? (YES/no):                       
    Probing for `National Semiconductor LM78' at 0x290...       No         
    Probing for `National Semiconductor LM78-J' at 0x290...     No         
    Probing for `National Semiconductor LM79' at 0x290...       No         
    Probing for `Winbond W83781D' at 0x290...                   No         
    Probing for `Winbond W83782D' at 0x290...                   No         
    Probing for `IPMI BMC KCS' at 0xca0...                      No         
    Probing for `IPMI BMC SMIC' at 0xca8...                     No         
    Some Super I/O chips may also contain sensors. We have to write to
    standard I/O ports to probe them. This is usually safe.          
    Do you want to scan for Super I/O sensors? (YES/no):             
    Probing for Super-I/O at 0x2e/0x2f                               
    Trying family `National Semiconductor'...                   No   
    Trying family `SMSC'...                                     No   
    Trying family `VIA/Winbond/Fintek'...                       No   
    Trying family `ITE'...                                      No   
    Probing for Super-I/O at 0x4e/0x4f                               
    Trying family `National Semiconductor'...                   No   
    Trying family `SMSC'...                                     No   
    Trying family `VIA/Winbond/Fintek'...                       No   
    Trying family `ITE'...                                      No   
    Some south bridges, CPUs or memory controllers may also contain
    embedded sensors. Do you want to scan for them? (YES/no):
    Silicon Integrated Systems SIS5595...                       No
    VIA VT82C686 Integrated Sensors...                          No
    VIA VT8231 Integrated Sensors...                            No
    AMD K8 thermal sensors...                                   No
    AMD K10 thermal sensors...                                  No
    Intel Core family thermal sensor...                         Success!
        (driver `coretemp')
    Intel AMB FB-DIMM thermal sensor...                         No
    Now follows a summary of the probes I have just done.
    Just press ENTER to continue:
    Driver `coretemp' (should be inserted):
      Detects correctly:
      * Chip `Intel Core family thermal sensor' (confidence: 9)
    Do you want to overwrite /etc/sysconfig/lm_sensors? (YES/no): no
    To load everything that is needed, add this to one of the system
    initialization scripts (e.g. /etc/rc.d/rc.local):
    #----cut here----
    # Chip drivers
    modprobe coretemp
    /usr/bin/sensors -s
    #----cut here----
    If you have some drivers built into your kernel, the list above will
    contain too many modules. Skip the appropriate ones! You really
    should try these commands right now to make sure everything is
    working properly. Monitoring programs won't work until the needed
    modules are loaded.
    ==================================================​===
    Have a nice day

  • Do you know of a simple way of sorting and deleting duplicate photos on  aperture

    Hi , Do you know of a simple way of sorting and then deleting duplicate photos on Apeture.
    Thanks Phil

    There is no simple way. The best strategy really is to take care not to import duplicates.
    What is your Aperture 3 version?
    What kind of duplicates are you asking about? 
    If you imported exactly the same file multiple times, sorting your images in the Finder by filename or creation date will display them side by side.
    If you have diferently sized versions of the same image, edited versions, or versions converted to a different format, then sorting by creation date will not help; you might try to sort by capture date, but that may fail, if there were different imezone settings when you imported the images.
    You could also sort be filename, if you did not rename the images on import.
    If you renamed your versions, adjusted the date, modified the file properties by writing to the original files, try to sort by other tages - faces, location, keywords.
    There are some helper applications to scan your Aperture library and tag duplicates: (I have not really tested any of them)
    Duplicate Annihilator (Mac) - Download  good to detect accidentally imported thumbnails
    http://photosweeper.en.softonic.com/mac  : This app can actually detect edited duplicates based on statistic measures and histogram similarity.
    Duplicate Cleaner for iPhoto - free

  • Do you know a project for handwriting?

    Do you know any project for handwriting that is similar to the window app? Cellwriter recognize only 1 char, what about software for recognizing entire words?

    Hi Peter,
    > I wonder if any of the OAM protocols, especially the one providing the loopback/ping test is unicast-based.
    In G.8013 (07/2011) section 7.3:
    "The Ethernet loopback function (ETH-LB) is used to verify connectivity of a MEP with a MIP or
    peer MEP(s). There are two ETH-LB types:
    • Unicast ETH-LB.
    • Multicast ETH-LB".
    > In any case, think of LOOP frames sent by Catalyst switches to detect  self-looped ports. In these frames,
    > the source and destination MAC  address are set to the unicast MAC of the egress port.
    As I said above, it's a good case for my little study.
    The LOOP frame, from Cisco, was certainly interesting and important before 2004.
    Since 802.3ah-2004 we have the OAM remote loopback (in link OAM, and not network OAM as ETH-LB).
    Best regards,
    Michel

  • Do you know of a place in Delhi, India that sells adapter / surge protector

    Last night in the hotel, first night in delhi and BOOM! All lights went out, surge protector smoked. Does anyone know what travel adapter and converter and surge procoter is needed and where in Delhi it would be available, a reliable source, brand new macbook and no power. please help lost in india.

    Hey LostNindia and welcome to the discussions!
    I was just traveling in Delhi and several other parts of India with my MacBook. I'm no expert in this area, but I'll let you know what I had that worked. I took with me a power converter and a two prong and three prong adaptor. I ended up never using the power converter, because the MacBook's power brick can handle up to 240 volts, which is the voltage in India. So, I don't believe you need a power convertor as I had no trouble with my American MacBook. I didn't bring a surge protector, and that may or may not have been wise. We had one power outage, but the MacBook was not plugged in at the time. So, I am unfortunately little help as to a suggestion for that, but I managed to make it without one. If you are looking for an adaptor, I'd suggest a three-prong adaptor. Two prong (the same as the UK) works, but not in all outlets. The prong outlets appeared to be located everywhere.
    As for a place to purchase these items- I noticed adaptors in the airport, but that probably is not accessible to you. I saw numerous electronics boutiques throughout India, and bought a firewire cable in one location- little shops like these probably have adaptors (and for cheap, too). I don't know where you are staying, but your hotel desk can probably recommend a place for the adaptors. The surge protector may be harder to find, but was also something I did not use.
    As a completely unrelated suggestion, I'd suggest turning off your wireless capabilities as there are few networks to access, and it nearly halves your battery life. I turned off mine and got over 5 hours of battery life while I was traveling the country.
    Hope this helps (and thanks to Niel for showing me this topic),
    JC

  • Did You Know -- Ten Innovations

    Good afternoon Did You Know fans! 
    Did you know HP customers can now print anything from anywhere with HP’s web-connected printing?  HP announced this exciting news along with other industry-first innovations unveiled by HP just Monday of this week.  Our teams are hard at work bringing the latest cutting edge technology straight to you.  Here’s some highlights of the news we announced this week that include driverless printing and the world’s smallest and one of the world’s most energy efficient color laser printers
    Some of our industry-first innovations include:
    The planet’s first PVC-free printer, the HP ENVY100 e-All-in-One, which lends cutting-edge design with wireless, Web-connected printing and access to HP‘s  “advanced apps”
    The industry’s first Web-ready large-format printer, the HP Designjet T2300 eMFP, featuring scan, print and copy functionality, with:
    Driverless printing from a laptop or USB drive for the first time, eliminating print driver and network constraints
    World’s first color touch-screen interface on a large-format printer
    World’s first large-format multi-function device at price point below $8,500, opening the door to in-house large-format printing for more customers
    The world’s first wide-format all-in-one device with web connectivity on the HP Officejet 7500A Wide Format e-All-in-One
    The world’s smallest color laser printer and one of the world‘s most energy efficient color laser printers, the HP LaserJet Pro 1025nw Color Printer
    World’s first consumer All-in-One printer with full Web browser and detachable touchscreen display on the HP Photosmart eStation All-in-One
    For the first time, enabling two-way print through the cloud for businesses, using HP Print Apps, creating an unparalleled web experience for business customers to access, manage, and share content from templates and stored documents
    World’s fastest production photo large-format printer within its class – the HP Designjet Z6200 Printer, increasing productivity for the graphics professional
    Check out the official news here in HP’s newsroom!
    HP Product Expert for the Officejet Pro X Series.
    Was your question answered? Mark it as an Accepted Solution!
    See a great post? Give it a Kudos!

    I do hope others find the videos useful. 
    ↙-----------How do I give Kudos?| How do I mark a post as Solved? ----------------↓

  • Ok Apple users...Is there a way to delete e-mails on my Mac and not have to delete the same e-mails on my iPhone, and iPad...and vise-versa. I have the Cloud, and thought that everything would sync all of the time. If you know of a setting I need to adjus

    Ok Apple users...Is there a way to delete e-mails on my Mac and not have to delete the same e-mails on my iPhone, and iPad...and vise-versa. I have the Cloud, and thought that everything would sync all of the time. If you know of a setting I need to adjust, please let me know.

    Are you referring to @mac.com, @me.com or @icloud.com emails? Or some other email providers emails?
    If the former, it should do that automatically. If the latter, no. iCloud does not (nor is it supposed to) sync non-Apple provided emails.

  • Did you know how easy it is to void your warranty?

    Many things are in the terms and conditions but I feel some need to be brought to the attention of the buyer,in Particular this one!
    Did you know that if the screen gets a scratch ,the warranty becomes void!!
    so even if there is a problem with the device itself that has nothing to do with you,if you have a scratch on the screen they wont repair it,claiming that there is damage to the device and the warranty is void!!
    Holy GOD,im shocked to find this out,but this is from Apple itself! A scratch on the screen means you have NO COVER!! Do me a favour and pass this on,as Im sure others will be as surprised as me to find this out!
    Quote from Apple when I asked if a scratch to the screen would mean I have no cover
    "Angelo:
    Yes, if there is any damage to the device the warranty is voided.".

    Not necessarily true as your post is too general.  The warranty does not cover cosmetic damage, so a scratched screen will not be repaired/replaced to fix the scratch.  However, Apple will determine, on a case by case basis, if the cosmetic damage actually indicates a cause for any functional or other hardware defect or improper function.
    You can indeed bring in a cosmetically flawed device for service under warranty for defective components.  The only time cosmetic damage will void the warranty entirely is if it is determined to indicate accidental damage, abuse or mis-use of the device in some way as to void the warranty.  But that is decided on a case by case basis, and there is no blanket rule governing such instances.
    You can read your warranty here - https://www.apple.com/legal/warranty (pick your country from the bottom right flag symbol).  In the USA, for an iPad with retina display, the main paragraph covering the issue you raise would be:
    "This Warranty does not apply: (a) to consumable parts, such as batteries or protective coatings that are designed to diminish over time, unless failure has occurred due to a defect in materials or workmanship; (b) to cosmetic damage, including but not limited to scratches, dents and broken plastic on ports; (c) to damage caused by use with another product; (d) to damage caused by accident, abuse, misuse, liquid contact, fire, earthquake or other external cause; (e) to damage caused by operating the Apple Product outside Apple’s published guidelines; (f) to damage caused by service (including upgrades and expansions) performed by anyone who is not a representative of Apple or an Apple Authorized Service Provider (“AASP”); (g) to an Apple Product that has been modified to alter functionality or capability without the written permission of Apple; (h) to defects caused by normal wear and tear or otherwise due to the normal aging of the Apple Product, or if any serial number has been removed or defaced from the Apple Product."
    Note the separate statements - that cosmetic damage itself is not covered, nor is damage caused by accident, abuse or misuse.  However, whether anything falling into the former criterion actually constitutes voidance of the warranty by the latter criterion will be determined by Apple when you present an item for warranty service.  One thing does not automatically imply the other.

  • Did you know about "Arbitration and Mediation" FAQ?

    I have just made a discovery that many of you frustrated Verizon customers will be very interested in knowing about. Did you know that you can type in legal action in the search verizon.com box and you will find a category called "Arbitration & Mediation" FAQ? For those of you, like myself who have been dealing with months and months of issues with Verizon and you are getting nowhere, you might check this out. It is very interesting.This may have saved me hours and hours of time and some over the top emotion that our situation has caused.

    Proper names are known. But product names will not be - nor will acronyms.

  • Did you know that your Internet Explorer is out of date?

    Hello there,
    when i access this site http://www.sickkids.ca/ , I am getting this error message, please advice.
    Did you know that your Internet Explorer is out of date?
    To get the best possible experience using our website we recommend that you upgrade to a newer version or other web browser. A list of the most popular web browsers can be found below"

    It's probably giving you that warning because your Firefox is very out of date. Please read [http://www.getfirefox.com www.getfirefox.com] to see how to update to the latest version of Firefox (14.0.1 right now)

  • Did you know this about bridge?

    I'm just curious if I'm the only one who is this slow... :p
    But did you know you could use Bridge to search your computer for images by dimensions? Man, I spent sooo much time this morning trying to find a way to 'trick' Windows into giving me a search by dimensions option. :D
    Afterwards, I wasted even
    more time googling for utilities or tools with that feature. :\ Then it hit me: I remembered seeing all kinds of neat bits of image information in Bridge last time I used it.
    And there it was, in the "find" menu... lol

    You are absolutely right, it is good business practice to check out the offerings from a company before you show or give it to your customers.
    I guess I just assumed that there would be a cut-out on the front cover of the Aperture books, since the soft cover books I ordered from iPhoto did have the front cover cut-out.
    My question, however, is where in the description of the Aperture hard cover book does it state that the cover photo is pasted on ? It is difficult to tell how the front cover is constructed from the photos on the Aperture web site.
    ...... I may have missed it.
    A lesson learned!
    Thanks for your comments.

Maybe you are looking for