FFT save and display

Hi,
Am new to labview and am just getting the hang of it. My main application is to acquire data and carry out FFT on it and store the FFT for subseuent review/ analysis.
I would like to store multiple FFTs and display it as a waterfall chart. Is it posible to show multiple FFT spectrums on a single waterfall chart.
Is it also possible to store and retrieve such spectrums.
(The spectrum generation will be a triggered event, either timed or operator triggered.)
Thanks
Deepak

Hello,
I'm not sure what version you're using, but I have attached binary file writer and reader examples in 8.0 which can serve as a model for storing your and retrieving your data - the writer example writes a 2D array to file, and the reader reads the file and displays the data - the file written by default is a file called test.bin on your C drive.
As for the waterfall chart, you'll find an example in the following thread (see the last post) which implements a waterfall plot using an XY Graph:
http://forums.ni.com/ni/board/message?board.id=170​&message.id=90065&requireLogin=False
I hope this helps!
Best Regards,
JLS
Message Edited by JLS on 07-19-2006 05:37 PM
Best,
JLS
Sixclear
Attachments:
Binary File Writer - 2D Array.vi ‏26 KB
Binary File Reader - 2D Array.vi ‏23 KB

Similar Messages

  • FFT SAVE and X-axis update issues

    Hi all,
     I created the following VI and have a couple of problems I cannot understand.  The first of which is that the save and open or read and write files are working, but I have to stop the VI operation and then choose save or read and then start the VI again for the program to recognize a change in state.  Although the buttons are in my main while loop.
     Also,  I have used a button ( FFT. time) to change the X.axis of the FFT graph however it gives me a data at end of file error is it is used when opening a file.  Undernormal operations, i.e. connected to a scope signal it works well, but only the error is data is read from file, the button does not work.  IS there an issue of using a command like this when reading from a file. 
    Please have a look-
    Solved!
    Go to Solution.

    Sorry lost the link but this was the previos answer to the same problem..
     Looks like this might be your answer. It appears to be a limitation in the Express VI itself that won't allow multiple read accesses after the end of the file has been reached (even if new data is appended).
    I do have a workaround, however, that isn't listed in the KnowledgeBase listed above that should only take a couple seconds to implement. The reason this error is occuring is that this VI "remembers" that it has already run before and encountered the EOF. It does this by setting internal flags. My trick will be to wipe the VIs memory after every time it runs. You might want to try this on a backup copy of your VI first. Here's how:
    First, we will need to convert the Read from Measurement File Express VI into a normal VI. You can do this by right clicking the VI and selecting Open Front Panel. A dialog will ask you if you want to convert. Select Yes. Your Express VI has now been turned into a normal VI whose parameters you set are hard-coded into the VI. In other words, you won't be able to use the configuration dialog to change any more settings at this point.
    Save your new VI with whatever name you choose. Now that the Express VI is a normal VI, we can change the way a VI is loaded into memory as a subVI (this is a NEW feature in LabVIEW 8, and one of the really cool ones). Right click the new VI and select Call Setup. It will bring up a dialog asking you how you want to load the subVI. "With Callers" just means a completely normal subVI. We want the option called "Reload for each call". This means that every time the VI is called, it is loaded into memory, and then unloaded from memory when it is finished executing. This, in effect, wipes the VI's memory after every call. Check out the modified VI I created below. After taking these steps, there is no more Error 4 when calling this VI in a loop. Hope this helps!Message Edited by Jarrod S. on 07-06-2006 10:36 AM
      Jarrod S.
    National Instruments  

  • Screen Saver and Display Sleep No Longer Work

    My set up:
    Mac Pro (stock) w/ 3GB RAM running 10.4.8.
    Two ADC displays connected via ADC to DVI adapters
    Issue:
    Recently I've noticed neither my screen saver nor display sleep work. I can get the machine to sleep manually, but not automatically. My energy settings have the display sleeping after 10 min w/ the computer and HDs never sleeping. Screen Saver is set to go on after 5 min.
    My MP used to go into screen saver -> display sleep mode fine. I don't know exactly when the issues started, but probably around 10.4.8. I have not installed any major software recently other than normal Apple updates.
    What I've tried:
    I've tried resetting the Energy Setting and Screen Saver Prefs and then doing a restart.
    If anyone has an idea what is preventing my MP from going into screen saver -> display sleep mode please post. This is driving me nuts.
    MacBook Pro 1.83 (7200 HD)/ MacPro 2.66/ mini 1.5Ghz / PBG4 1.25Ghz   Mac OS X (10.4.8)  

    Turned out a bad USB device was preventing sleep. Once I removed it the display went to sleep like a baby.

  • Send Email & Save and Display Data

    I've got a simple process with a Set Value and Assign User activities and one variable to read the contents of an XDP form. The assigned user the reviews the form. This much I know works.
    From this point on, I am adding to routes to the last task: the reviewer may accept or reject the form. If it is accepted, I want the form to be saved in PDF form and displayed for the user to read and type some of that data somewhere else (I may automate this at another time). If it is rejected, I want Workspace to send an email to the process creator (the person who filled out the form--not the reviewer) indicating that there are errors or omissions to correct. Then, the form is reassigned to the process creator, who works on it and resubmits it for review.
    My questions are as follows:
    1- I'm thinking of using a Send Email service to send a short, very specific message, but I don't know how to capture the process creator's email address to use in this service. Would you any other way of doing this?
    2- I can't figure out what service to use to save the PDF and to display it for the reviewer to copy data manually into another application.
    I'm still new at this and find the available information a little cryptic. I probably don't know where to find it too. I'd appreciate any help that you can provide.
    Thank you!

    We are using JBoss but MSSQL, not MySQL.
    I also decided to change the process slightly to avoid unnecessary steps and, perhaps, this query step altogether.
    So this is what I have so far: A Set Value task to fill the form, and an Assign User to assign the form for review. Upon acceptance by the Reviewer, the form should be saved and/or printed, as selected by the Reviewer. Upon reject, it should be reassigned to the Process Creator for correction/completion. When this is done, the form should be resubmitted for review.
    The form is filled, but the Reviewer gets nothing in his queue (To Do list), even thought he's assigned in the process. The email notifications are not working correctly yet, but it should still be assigned to the Reviewer, correct? He's the Specific User in the Initial User Selection property.
    I'd appreciate any help that you can provide.
    Thanks!

  • Save and display the content

    Hello Experts,
    I have created an XML form to capture the data from the End User and created a HTML file to display the form and integrated this to an iView. Now, I have to capture the data from the XML form and display it in another page.
    Can you please let me know how to do that?
    BR,
    RN

    HI RN,
    First fill the form and submit it ,then it will show the saved content in NewsBrowser.
    after saving also of you are not getting then its a renderList item problem
    Follow this SAP given article on XML forms hope this will solve all yout issues
    [How to.. create XML forms|http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/ee639033-0801-0010-0883-b2c76b18583a?QuickLink=index&overridelayout=true]
    add this wiki also (its straight and simple)
    http://wiki.sdn.sap.com/wiki/display/KMC/XMLFormBuilderinEP7.0
    or
    Change the Hyperlink prroperty as "display" this will shows your content(right bottom side properties list in XML form)
    any changes to the XMl forms will effect to the portal only after "Generating Project".
    Regards,
    Maheshchandra.
    Edited by: maheshchandra.lanco on Jun 24, 2010 7:48 AM

  • How do I save and display all messages in non primary email address

    I have 2 email accounts on Thunderbird. The emails to the secondary account are not saved. I can open and read new messages but if I want to view them later, they are gone. My primary email retains all messages. Can I configure Thunderbird so I can retain all messages on more than one email account? If so, How?

    There are several possible reasons that messages seem to 'disappear'.
    There are two types of email accounts: IMAP and POP. See https://support.mozilla.org/en-US/kb/glossary-terms-including-types-accounts
    If you have a POP account and are accessing the mail on more than one computer or smartphone, whichever device reads (downloads) the message first will have it locally, but it will no longer be listed or available on the other devices.
    If you have an IMAP account, the message stays on the server, but if one device (user) moves or deletes the message, it will affect the view on all devices. So, for example, if you are using your smartphone and take some action on an email, when you get back to your computer, it will reflect that same action (but you might not have realized what caused it).
    Another, less likely, reason for messages not to show up in your inbox is having the preference set to show only unread or recent messages. Then once you read them they seem to disappear.
    If you are still having problems, please look at the following items and respond with the information.
    1) What operating system do you use (Win8, MAC, Linux, etc)?
    2) Are you using IMAP or POP?
    3) If your mail server has a browser interface (web mail access such as mail.google.com), do the messages show up there?
    4) Right click on the folder in question and select Properties.
    a) Number of messages?
    b) Size on disk?
    5) Left click on the account name; View settings for this account; highlight Server settings;
    What choices are marked under "When I delete a message"?
    6) What, if any, antivirus program do you have installed?

  • OOPs :  SAVE and ALV Display Variant

    Can you please send me the code for 'Save and Display Variant' in ALV OOPs.

    DATA :  l_layout TYPE disvariant.
      l_layout-report = sy-repid.
    l_layouth-zebra = 'X'.   
    CALL METHOD gr_alvgrid->set_table_for_first_display
           EXPORTING
       I_BUFFER_ACTIVE               =
       I_BYPASSING_BUFFER            =
       I_CONSISTENCY_CHECK           =
         i_structure_name              =  'ZQM01'    
    <b>     is_variant                    =  l_layout
         i_save                        = 'A'</b>
       I_DEFAULT                     = 'X'
        is_layout                     =  gs_layout
       IS_PRINT                      =
       IT_SPECIAL_GROUPS             =
       IT_TOOLBAR_EXCLUDING          =
       IT_HYPERLINK                  =
       IT_ALV_GRAPHICS               =
       IT_EXCEPT_QINFO               =
          CHANGING
             it_outtab                     = gt_list[]
             it_fieldcatalog               = gt_fieldcat
       IT_SORT                       =
       IT_FILTER                     =
           EXCEPTIONS
             invalid_parameter_combination = 1
             program_error                 = 2
             too_many_lines                = 3
             OTHERS                        = 4
        IF sy-subrc <> 0.
    MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
               WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
        ENDIF.

  • Photo or Video clip is not being saved and display...

    hello!  i have nokia n95  8gb  model n95-2type:rm.320 when we take photo or video clip it does not save and display in gallry
    Moderator's Note: A more appropriate subject was provided as the post was moved to the correct board.

    ghorzang, who made you microSD card?

  • Is there a way to open Excell file from the server and display in the UI and save it back on to the

    Hello there,
    Is there a way to open Excell file from the server and display in the UI and save it back on to the server? (like showing xell file as a datagrid - add rows, columns etc.)

    Hi Mike,
    Welcome you to the forum.
    You may try:
    SELECT * FROM MyDBNameHere.dbo.OUSR T0
    Thanks,
    Gordon

  • Mail 3.6 (on MacOS 10.5.7) doesn't display 'Save' and 'Quick Look' buttons

    I have recently updated to MacOS 10.5.7 and discovered a strange glitch in viewing certain emails with attachments. For a small minority of emails with attachments, the 'paperclip' icon appears in the mail list, indicating the presence of an attachment, but neither the icon for the attachment nor the 'save' and 'quick look' buttons appear. Options to save the attachment or quick look the attachment under the File menu do work.
    Clearly the attachment is there but Apple Mail 3.6 doesn't know how to indicate it. This inconsistency in the interface's feedback about attachments has been very irritating.
    Remedies I have attempted thus far:
    • Rebuilding the mail box (no change)
    • Disabling all Mail extensions (bundles)
    • Examining the raw mail code (nothing obvious wrong, but I am not an expert).
    The problem is currently present for some Microsoft Word file attachments, but I have no clue if it is limited to just those attachments.
    I will note the latest email with this failure to display attachments was sent by a colleague using Apple Mail on an iPod Touch, so I can't believe it is a mangled attachment. It is not limited to a single sender, so again, no reason to believe mangled attachments.
    I would really appreciate any suggestions for how to fix this...

    I disabled the mail extensions by removing them from the ~/Library/Mail/Bundles/ directory. I didn't think the mail extensions could get patched into Mail.app by any other means, but if you care to clarify I would appreciate it.

  • I get a dialogue box asking "What should Firefox do with this file" Options open with or save file. My wife selected save file and now it only opens note pad and displays the text of the file to be saved. OK in windows Internet Explorer.

    I get a dialogue box asking "What should Firefox do with this file" Options open with or save file. My wife selected save file and now it only opens note pad and displays the text of the file to be saved. OK in windows Internet Explorer.

    P.S. Site is http://www.coldwatercreek.com

  • Photoshop: How to save as a pdf and display description?

    The only other Photoshop I ever used was CS3, and when I clicked "print" it saved as a pdf first, and I could choose to make it display different metadata. That feature has been removed for all newer versions for some reason, and I have no idea how to do what I want to do.
    I need to save it as a pdf, and display the description/subject metadata under the photo. I can't find anything online on how to do this.

    BlazeHeatnix,
    Due to the current unavailability of clairvoyants and mind-readers in the forum, we respectfully request you supply sensible, complete details.
    Please understand that "CS5" does not clear up the issue of what version of Photoshop you are using.  "Photoshop CS5 12.0.1" would.
    A screen capture would be very helpful.
    Also, have you trued the Print command, then Save As PDF?
    BOILERPLATE TEXT:
    Note that this is boilerplate text.
    If you give complete and detailed information about your setup and the issue at hand,
    such as your platform (Mac or Win),
    exact versions of your OS, of Photoshop (not just "CS6", but something like CS6v.13.0.6) and of Bridge,
    your settings in Photoshop > Preference > Performance
    the type of file you were working on,
    machine specs, such as total installed RAM, scratch file HDs, total available HD space, video card specs, including total VRAM installed,
    what troubleshooting steps you have taken so far,
    what error message(s) you receive,
    if having issues opening raw files also the exact camera make and model that generated them,
    if you're having printing issues, indicate the exact make and model of your printer, paper size, image dimensions in pixels (so many pixels wide by so many pixels high). if going through a RIP, specify that too.
    etc.,
    someone may be able to help you (not necessarily this poster, who is not a Windows user).
    a screen shot of your settings or of the image could be very helpful too.
    Please read this FAQ for advice on how to ask your questions correctly for quicker and better answers:
    http://forums.adobe.com/thread/419981?tstart=0
    Thanks!

  • How to pop up "save" and "open" window - Help with construct xml

    In my report there is a column link which is pointing to another HTML page that has xml data displayed in a textarea field. So when user clicks on the column link, he gets to directed to the page that have the xml data in text format.
    My question is, how can i make the xml data display as a file, so when the user clicks on the column link, a window with "save" and "open" will pop up so the user can save the xml data as a file?
    Has anyone done something similar like this? any help is appreciated!
    Regards,
    gina
    Message was edited by:
    gina

    Thank you Tine, I tried to use the 'Export XML' report template and tried to do the following query:
    SELECT XMLElement("oai_dc:dc",
    XMLAttributes('http://www.openarchives.org/OAI/2.0/oai_dc/' AS "xmlns:oai_dc",
                        'http://purl.org/dc/elements/1.1/' AS "xmlns:dc",
    'http://www.w3.org/2001/XMLSchema-instance' AS "xmlns:xsi",
    'http://www.loc.gov/mods/v3' AS "xmlns:mods"
    XMLForest(
    dctitle AS "dc:title",
    dccreator AS "dc:creator",
    dcsubject AS "dc:subject",
    dcdescription AS "dc:description",
    dccontributor AS "dc:contributor",
    dcdiscovery AS "dc:discovery",
    dctype AS "dc:type",
    dcformat AS "dc:format",
    LOWER('ksl:posters-' || dcidentifier) AS "dc:identifier",
    dcsource AS "dc:source",
    dclanguage AS "dc:language",
    dcrelation AS "dc:relation",
    dccoverage AS "dc:coverage",
    dcrights AS "dc:rights")) AS "RESULT"
    FROM table_name
    and here is what returned in the “save as" file:
    <?xml version="1.0" encoding="utf-8" ?>
    - <XMLREPORTREGION>
    - <ROW ROWNUM="1">
    <RESULT>[datatype]</RESULT>
    </ROW>
    </XMLREPORTREGION>
    How can i construct the query so that it returns the data in xml format like the following?:
    oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
    <dc:title>Rose</dc:title>
    <dc:creator>Smith Black</dc:creator>
    <dc:contributor>Smith Black</dc:contributor>
    <dc:type>Stencil</dc:type>
    <dc:format>image/tiff</dc:format>
    <dc:format>image/jp2</dc:format>
    <dc:description>13 3/4" X 9 1/2"</dc:description>
    <dc:relation>Some collection</dc:relation>
    <dc:date>1987</dc:date>
    <dc:subject type="LCSH">Art Project</dc:subject>
    <dc:subject type="LCSH">........</dc:subject>
    <dc:subject type="LCSH">.........</dc:subject>
    <dc:language>eng</dc:language>
    <dc:rights>......<dc:rights>
    <dc:identifier>.....</dc:identifier>
    </oai_dc:dc>
    I don't know much about xml, any help would be really appreciated.
    Thanks,
    gina
    Message was edited by:
    gina

  • What happened to the Bookmark all Tabs/Save and Exit/Open previous session feature in 4.0? If this has been taken out then 4.0 is of no use to me. I'll have to go back to 3.6

    In 3.6 when ever I closed the browser with multi tabs open it would give me the option to Save and Exit. Then when I reopened the browser it would give me the option to open the previous session. I could also bookmark all open tabs. All of these features appear to no longer be present in 4.0. If this is the case I will be forced to uninstall and reinstall 3.6.

    Bookmark All Tabs - you can get it when you right-click on a tab, or use keyboard shortcut Control+Shift+D.
    Firefox now always stores the old session, and you can access it by going to the History menu and selecting "Restore Previous Session"
    If you want Firefox to display the message to save the session, it can be turned back on by changing some preferences.
    # Type '''about:config''' into the location bar and press enter
    # Accept the warning message that appears, you will be taken to a list of preferences
    # Locate the preference '''browser.tabs.warnOnClose''', if its value is set to '''false''', double-click on it to change its value to '''true'''
    # Repeat this for these 3 preferences '''browser.warnOnQuit''', '''browser.warnOnRestart''' and '''browser.showQuitWarning'''
    If you always open the last set of tabs, an alternative approach is this:
    # Click the orange Firefox button, then select options to open the options window
    # Go to the General panel
    # Change the setting "When Firefox starts" to "Show my windows and tabs from last time"

  • HELP! How come I can't 'save and quit' any longer with this new ver of Firefox? Does anyone know how to fix this?

    When I updated Firefox I have now discovered I can no longer action the 'save and quit' function when closing down Firefox! Is this a common problem and more to the point is there a solution to this?? ie, change settings or some form of patch??
    Any help would be greatly appreciated as this function WAS awesome when needing certain tabs kept open.

    Firefox now always stores the old session, and you can access it by going to the History menu and selecting "Restore Previous Session"
    If you want Firefox to display the message to save the session, it can be turned back on by changing some preferences.
    # Type '''about:config''' into the location bar and press enter
    # Accept the warning message that appears, you will be taken to a list of preferences
    # Locate the preference '''browser.tabs.warnOnClose''', if its value is set to '''false''', double-click on it to change its value to '''true'''
    # Repeat this for these 3 preferences '''browser.warnOnQuit''', '''browser.warnOnRestart''' and '''browser.showQuitWarning'''
    If you always open the last set of tabs, an alternative approach is this:
    # Click the orange Firefox button, then select options to open the options window
    # Go to the General panel
    # Change the setting "When Firefox starts" to "Show my windows and tabs from last time"

Maybe you are looking for