Store data in dynamic buffer

Hello,
I'm acquaring a blood pressure signal and I would like to integrate it from one heart beat until the next beat occure, and so on.
I made a subVI which tells me when the peaks occure and gives me their timestamps.
I will need to calculate the integral of this signal between the two peaks, in real time. So after each pulse, I will get a numeric value representing the integral.
The best way to do that is to store the data in a buffer and overwrite it at each peak? If yes, how can I do that?
If I store the data in a numeric array, will I lose the timestamps of each voltage data?
For now since I can't use the sensors, I'm simulating the signal with a sine wave at 1Hz. The BPM detection and timestamps work perfectly; 60 BPM.
I'm getting the dynamic data for the blood pressure signal as you can see.
The boolean "Pulse" is true everytime there is a peak in the ECG.
Regards

Hi simo,
why don't you stick with your original thread?
I already told you how to store data! Use shift register(s)! (And stay away from DDT…)
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

Similar Messages

Store data in a Labview buffer

Hi,
I was wondering if labview allowed to store data in a kind of buffer or temporary memory to wait for all test complete and then export them to excel using the report generation toolkit ?
If this is possible I would like to know how can I implement it, because I am using the report generation toolkit but it takes too much time to open and close excel for each test to save data.
thanks,
Solved!
Go to Solution.

Hi lngenu,
You can do this using the shift registers. Kindly go through the attached vi for more information.
Regards,
Nitzz
(Give kudos to good Answers and Mark it as a Solution if your problem is Solved)
Attachments:
Untitled 6.vi ‏11 KB

How to delete data from dynamic internal table

Hi,
I have dynamic internal table and I have some slection screen fields , using these selection screen fields
(select -options), I have to filter the data? assigning will work with READ , but I have select options not the parametre,
and also delete will not work for dynamic table..
as we cannot use assigning with delete..
So how to do this?
and one more thing is , I cannot filter the data while selection( in select, I cannot filter the data-> as it's not coming directly from table, it's coming from buffer),
so now after selection of data, I need to filter the data from dynamic table.
Is there any way to do this?
Regards,
Mrunal

Hi matt,
I tried with below code as you said. But I am getting dump. can you help?
here is my piece of code.
FIELD-SYMBOLS: <LS_DATA> type any,
                           <LT_DATA> TYPE table,
                            <L_FIELD> type any.
    ASSIGN <l_buffer_entry>-dataptr->* TO <LS_DATA>.
    ASSIGN <l_buffer_entry>-dataptr->* TO <LT_DATA>.
LOOP AT <LT_DATA> ASSIGNING <LS_DATA>.
ASSIGN COMPONENT 'BUKRS' OF STRUCTURE <LS_DATA> TO <L_FIELD>.
IF <L_FIELD> NOT IN SO_BUKRS.
DELETE <LT_DATA>.
ENDIF.
UNASSIGN <L_FIELD>.
ASSIGN COMPONENT 'BELNR' OF STRUCTURE <LS_DATA> TO <L_FIELD>.
IF <L_FIELD> NOT IN SO_BELNR.
DELETE <LT_DATA>.
ENDIF.
UNASSIGN <L_FIELD>.
ENDLOOP.
and here is the description of my dump:->>>
You attempted to access an unassigned field symbol
(data segment 32772).
This error may occur for any of the following reasons:
- You address a typed field symbol before it is set using ASSIGN
- You address a field symbol that points to a line in an internal table
that has been deleted
- You address a field symbol that had previously been reset using
UNASSIGN, or that pointed to a local field that no longer exists
- You address a global function interface parameter, even
though the relevant function module is not active,
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How to store data (in tdm files)

I'm looking for advice on how to store data in tdm/tdx files.
The main challenge is like this: At regular time intervals there is new data available (say every 10 minutes there are 10 minutes of new data available). All data is time based. So every ten minutes I may create a new tdm/tdx file containing this data segment. However, when i want to analyze the data i dont necessarily want to view 10 minutes of data from all channels, but maybe 20 hours of data from one particular channel.
The way I've achieved this so far is to manually load each 10 minute segment of this particular channel and then add these parts together. This is both time consuming and cumbersome. Is there a better way to do this that I've simply not discovered yet? Is there a better way to store data to simplify this process?
One solution is of course to save data from several 10-minute frames in one file, but seeing as there is a never ending supply of data i cant simply save all data in one giant file, it has to be split up at some point, and the problem will still remain.
One factor to have in mind here is that this is rather large amounts of data (maybe 10GB each day), so the option to simply load all the data into memory goes out the window rather quickly.
Feel free to ask if I've not made myself very clear

Hi salte,
If your test ever ended, and if you had LabVIEW 8.20 or higher, I would recommend using a TDMS file, which handles data appeands flawlessly. DIAdem 10.1 now also does data reduction and index windowing during file loading for TDM / TDMS / DataPlugin files, so that you could easily load out only the part of the file you wanted to look at. But since you describe your data acquisition as never stopping and amassing 10 GB per day, I agree that it would be impractical to use only 1 data file. So we are stuck with some number of files which each contain a part of your measurement. This approach can have advantages, since you can save operational properties for each "buffer" such as average value, dominant frequency, ambient room temperature, etc., and later on you can use the DataFinder to query out only the data buffers which meet specific conditions based on these properties. The problem remains to load and assemble data based on multiple files. This is an old problem in DIAdem, and one for which I have an efficient and I hope satisfactory workaround application. It does what you describe already doing in the minimum amount of time and with the minimum amount of user interaction, and it can be highly parametrized to suit your particular situation. The ideal way to start the application would be as part of a ResultsList custom menu. This would enable you to query out the buffers you wanted, highlight those rows in the ResultsList, right-click and choose your custom menu, and WHAM! the selected buffers for your queried channel(s) are automatically appended together in the DataPortal. Launching from a ResultsList custom menu would mean that you could skip the file dialog and just read out the data sources directly from the ResultsList selection.
Let me know what you think,
Brad Turpin
DIAdem Product Support Engineer
National Instruments
Attachments:
Importing Data from Multiple DataPlugin Files.zip ‏198 KB

How to populate data in dynamic internal table

Hi Expert,
fyi. My dynamic internal table field is created base on data selected. Eg. select table qpcd has 5 records. These 5 recods will become fieldname to my dynamic internal table. My dynamic internal table will be
...itab
      01
      02
      03
      04
      05
The 5 records from qpcd is populated in another table call viqmel. I need to find the occurance of each code in viqmel and populate the number of occurance in itab in each of column. The final dynamic itab will be like this
table itab
01       02     03    04     05   -
> field name
2         0        1     0       1    -
> data
my source code like below
Report ZPLYGRND2.
TABLES: mara, makt.
TYPE-POOLS: slis, sydes.
DATA:it_fcat TYPE slis_t_fieldcat_alv,
     is_fcat LIKE LINE OF it_fcat,
     ls_layout TYPE slis_layout_alv.
DATA: it_fieldcat TYPE lvc_t_fcat,
      is_fieldcat LIKE LINE OF it_fieldcat.
DATA: new_table TYPE REF TO data,
      new_line TYPE REF TO data,
      ob_cont_alv TYPE REF TO cl_gui_custom_container,
      ob_alv TYPE REF TO cl_gui_alv_grid,
      vg_campos(255) TYPE c,
      i_campos LIKE TABLE OF vg_campos,
      vg_campo(30) TYPE c,
      vg_tables(60) TYPE c.
types : begin of t_qpcd,
         codegruppe like qpcd-codegruppe,
         code like qpcd-code,
        end of t_qpcd.
data:wa_qpcd type t_qpcd,
     i_qpcd type standard table of t_qpcd initial size 0.
FIELD-SYMBOLS: <l_table> TYPE table,
               <l_line> TYPE ANY,
               <l_field> TYPE ANY.
select * into corresponding fields of wa_qpcd from qpcd
where katalogart = 'D'
and   codegruppe = 'OOT01'.
append wa_qpcd to i_qpcd.
endselect.
loop at i_qpcd into wa_qpcd.
is_fcat-fieldname = wa_qpcd-code.
APPEND is_fcat TO it_fcat.
endloop.
LOOP AT it_fcat INTO is_fcat.
    is_fieldcat-fieldname = is_fcat-fieldname.
    is_fieldcat-ref_field = is_fcat-ref_fieldname.
    is_fieldcat-ref_table = is_fcat-ref_tabname.
    APPEND is_fieldcat TO it_fieldcat.
ENDLOOP.
*... Create the dynamic internal table
CALL METHOD cl_alv_table_create=>create_dynamic_table
    EXPORTING
        it_fieldcatalog = it_fieldcat
    IMPORTING
        ep_table = new_table.
if sy-subrc = 0.
endif.
*... Create a new line
ASSIGN new_table->* TO <l_table>.
CREATE DATA new_line LIKE LINE OF <l_table>.
ASSIGN new_line->* TO <l_line>.
LOOP AT <l_table> INTO <l_line>.
ENDLOOP.

hello dear i m giving u a code in this a dynamic table is made on the basis of table in database , and u can download this data correct it , see it, or even change it....and upload in tht table help full if u dont know the table name...in advance.
also the code to populate data in dynamic table is in this code like:
SELECT * FROM (MTABLE_N)
INTO CORRESPONDING FIELDS OF TABLE <FS_ITAB> .
look at the whole program .hope this solve ur problem thanks.
REPORT ZTESTA MESSAGE-ID ZIMM    .
TYPES : DATA_OBJECT TYPE REF TO DATA.
DATA : MITAB TYPE REF TO DATA .
TYPE-POOLS : SLIS .
DATA : IT_FIELDCAT TYPE STANDARD TABLE OF SLIS_FIELDCAT_ALV
WITH HEADER LINE .
DATA : IT_FIELDCATALOG TYPE LVC_T_FCAT .
DATA : WA_FIELDCATALOG TYPE LVC_S_FCAT .
DATA : I_STRUCTURE_NAME LIKE DD02L-TABNAME .
DATA : I_CALLBACK_PROGRAM LIKE SY-REPID .
DATA : DYN_LINE TYPE DATA_OBJECT .
FIELD-SYMBOLS : <FS_ITAB> TYPE STANDARD TABLE .
DATA : TABLE_NAME_IS_VALID TYPE C .
DATA : DYNAMIC_IT_INSTANTIATED TYPE C .
CONSTANTS BUTTONSELECTED TYPE C VALUE 'X' .
SELECTION-SCREEN BEGIN OF LINE.
SELECTION-SCREEN COMMENT 5(29) T_TABL.
PARAMETERS : MTABLE_N LIKE RSRD1-TBMA_VAL
MATCHCODE OBJECT DD_DBTB_16 OBLIGATORY .
DATA CHECKTABLED.
SELECTION-SCREEN END OF LINE.
SELECTION-SCREEN BEGIN OF LINE.
SELECTION-SCREEN COMMENT 5(29) T_FILE.
PARAMETERS : MFILENAM LIKE RLGRAP-FILENAME .
SELECTION-SCREEN END OF LINE.
SELECTION-SCREEN BEGIN OF LINE.
SELECTION-SCREEN COMMENT 5(29) T_DOWN.
PARAMETERS : P_DOWNLD RADIOBUTTON GROUP GRP1
USER-COMMAND M_UCOMM .
SELECTION-SCREEN END OF LINE.
SELECTION-SCREEN BEGIN OF LINE.
SELECTION-SCREEN COMMENT 5(29) T_CHKF.
PARAMETERS : P_CHKFIL RADIOBUTTON GROUP GRP1 .
SELECTION-SCREEN END OF LINE.
SELECTION-SCREEN BEGIN OF LINE.
SELECTION-SCREEN COMMENT 5(29) T_UPLD.
PARAMETERS : P_UPLOAD RADIOBUTTON GROUP GRP1 .
SELECTION-SCREEN END OF LINE.
SELECTION-SCREEN BEGIN OF LINE.
SELECTION-SCREEN COMMENT 5(29) T_SHOW.
PARAMETERS : P_SHOW_T RADIOBUTTON GROUP GRP1 .
SELECTION-SCREEN END OF LINE.
AT SELECTION-SCREEN OUTPUT .
PERFORM CHECK_FILENAME .
AT SELECTION-SCREEN.
IF SY-UCOMM = 'ONLI'.
    CHECKTABLED = MTABLE_N+0(1).
    IF CHECKTABLED NE 'Z'.
      MESSAGE I017.
      LEAVE TO SCREEN 1000.
    ENDIF.
    IF SY-UNAME NE 'KAMESH.K'.
      MESSAGE I023 WITH SY-UNAME.
      LEAVE TO SCREEN 1000.
    ENDIF.
ENDIF.
IF SY-UCOMM = 'PRIN'.
    CHECKTABLED = MTABLE_N+0(1).
    IF CHECKTABLED NE 'Z'.
      MESSAGE I017.
      LEAVE TO SCREEN 1000.
    ENDIF.
    IF SY-UNAME NE 'KAMESH.K'.
      MESSAGE I023 WITH SY-UNAME.
      LEAVE TO SCREEN 1000.
    ENDIF.
ENDIF.
AT SELECTION-SCREEN ON VALUE-REQUEST FOR MFILENAM .
PERFORM F4_FOR_FILENAME .
INITIALIZATION .
T_TABL = 'Table Name' .
T_FILE = 'File Name' .
T_DOWN = 'Download Table' .
T_CHKF = 'Check File to Upload' .
T_UPLD = 'Upload File' .
T_SHOW = 'Show Table Contents' .
START-OF-SELECTION .
PERFORM CHECK_TABLE_NAME_IS_VALID .
END-OF-SELECTION .
IF TABLE_NAME_IS_VALID EQ ' ' .
    MESSAGE I398(00) WITH 'INVALID TABLE NAME' .
ELSE .
    PERFORM INSTANTIATE_DYNAMIC_INTERNAL_T .
    CHECK DYNAMIC_IT_INSTANTIATED = 'X' .
    CASE BUTTONSELECTED .
      WHEN P_DOWNLD .
        PERFORM SELECT_AND_DOWNLOAD .
      WHEN P_CHKFIL .
        PERFORM CHECK_FILE_TO_UPLOAD .
      WHEN P_UPLOAD .
        PERFORM UPLOAD_FROM_FILE .
      WHEN P_SHOW_T .
        PERFORM SHOW_CONTENTS .
    ENDCASE .
ENDIF .
FORM CHECK_TABLE_NAME_IS_VALID.
DATA MCOUNT TYPE I .
TABLES DD02L .
CLEAR TABLE_NAME_IS_VALID .
SELECT COUNT(*) INTO MCOUNT FROM TADIR
WHERE PGMID = 'R3TR'
AND OBJECT = 'TABL'
AND OBJ_NAME = MTABLE_N .
IF MCOUNT EQ 1 .
    CLEAR DD02L .
    SELECT SINGLE * FROM DD02L WHERE TABNAME = MTABLE_N .
    IF SY-SUBRC EQ 0.
      IF DD02L-TABCLASS = 'TRANSP' .
        TABLE_NAME_IS_VALID = 'X' .
      ENDIF .
    ENDIF.
ENDIF .
ENDFORM. " CHECK_TABLE_NAME_IS_VALID
FORM SELECT_AND_DOWNLOAD.
CLEAR : <FS_ITAB> .
SELECT * FROM (MTABLE_N)
INTO CORRESPONDING FIELDS OF TABLE <FS_ITAB> .
PERFORM CHECK_FILENAME.
CALL FUNCTION 'WS_DOWNLOAD'
       EXPORTING
            FILENAME                = MFILENAM
            FILETYPE                = 'DAT'
       TABLES
            DATA_TAB                = <FS_ITAB>
       EXCEPTIONS
            FILE_OPEN_ERROR         = 1
            FILE_WRITE_ERROR        = 2
            INVALID_FILESIZE        = 3
            INVALID_TYPE            = 4
            NO_BATCH                = 5
            UNKNOWN_ERROR           = 6
            INVALID_TABLE_WIDTH     = 7
            GUI_REFUSE_FILETRANSFER = 8
            CUSTOMER_ERROR          = 9
            OTHERS                  = 10.
IF SY-SUBRC EQ 0.
    MESSAGE I398(00) WITH 'Table' MTABLE_N
    'successfully downloaded to '
    MFILENAM .
ENDIF.
ENDFORM. " SELECT_AND_DOWNLOAD
FORM UPLOAD_FROM_FILE.
DATA : ANS TYPE C .
DATA : LINES_OF_ITAB TYPE I .
DATA : MSY_SUBRC TYPE I .
CALL FUNCTION 'POPUP_TO_CONFIRM_STEP'
       EXPORTING
            TEXTLINE1 = 'Are you sure you wish to upload'
            TEXTLINE2 = 'data from ASCII File to DB table '
            TITEL     = 'Confirmation of Data Upload'
       IMPORTING
            ANSWER    = ANS.
IF ANS = 'J' .
    PERFORM CHECK_FILENAME.
    CLEAR MSY_SUBRC .
    CALL FUNCTION 'WS_UPLOAD'
         EXPORTING
              FILENAME                = MFILENAM
              FILETYPE                = 'DAT'
         TABLES
              DATA_TAB                = <FS_ITAB>
         EXCEPTIONS
              CONVERSION_ERROR        = 1
              FILE_OPEN_ERROR         = 2
              FILE_READ_ERROR         = 3
              INVALID_TYPE            = 4
              NO_BATCH                = 5
              UNKNOWN_ERROR           = 6
              INVALID_TABLE_WIDTH     = 7
              GUI_REFUSE_FILETRANSFER = 8
              CUSTOMER_ERROR          = 9
              OTHERS                  = 10.
    MSY_SUBRC = MSY_SUBRC + SY-SUBRC .
    IF SY-SUBRC EQ 0.
      DESCRIBE TABLE <FS_ITAB> LINES LINES_OF_ITAB .
      IF LINES_OF_ITAB GT 0 .
        MODIFY (MTABLE_N) FROM TABLE <FS_ITAB> .
        MSY_SUBRC = MSY_SUBRC + SY-SUBRC .
      ENDIF .
    ENDIF.
    IF MSY_SUBRC EQ 0 .
      MESSAGE I398(00) WITH LINES_OF_ITAB
      'Record(s) inserted in table'
      MTABLE_N .
    ELSE .
      MESSAGE I398(00) WITH
      'Errors occurred No Records inserted in table'
      MTABLE_N .
    ENDIF .
ENDIF .
ENDFORM. " UPLOAD_FROM_FILE
FORM F4_FOR_FILENAME.
CALL FUNCTION 'WS_FILENAME_GET'
       EXPORTING
            DEF_PATH         = 'C:\'
            MASK             = ',.,..'
            MODE             = '0'
       IMPORTING
            FILENAME         = MFILENAM
       EXCEPTIONS
            INV_WINSYS       = 1
            NO_BATCH         = 2
            SELECTION_CANCEL = 3
            SELECTION_ERROR = 4
            OTHERS           = 5.
ENDFORM. " F4_FOR_FILENAME
FORM CHECK_FILENAME.
IF MFILENAM IS INITIAL
AND NOT ( MTABLE_N IS INITIAL )
AND P_SHOW_T NE BUTTONSELECTED.
    CONCATENATE 'C:\'
    MTABLE_N '.TXT' INTO MFILENAM.
ENDIF .
ENDFORM. " CHECK_FILENAME
FORM INSTANTIATE_DYNAMIC_INTERNAL_T.
CLEAR DYNAMIC_IT_INSTANTIATED .
I_STRUCTURE_NAME = MTABLE_N .
CLEAR IT_FIELDCAT[] .
CALL FUNCTION 'REUSE_ALV_FIELDCATALOG_MERGE'
       EXPORTING
            I_STRUCTURE_NAME       = I_STRUCTURE_NAME
       CHANGING
            CT_FIELDCAT            = IT_FIELDCAT[]
       EXCEPTIONS
            INCONSISTENT_INTERFACE = 1
            PROGRAM_ERROR          = 2
            OTHERS                 = 3.
IF SY-SUBRC EQ 0.
    LOOP AT IT_FIELDCAT .
      CLEAR WA_FIELDCATALOG .
      MOVE-CORRESPONDING IT_FIELDCAT TO WA_FIELDCATALOG .
      WA_FIELDCATALOG-REF_FIELD = IT_FIELDCAT-FIELDNAME .
      WA_FIELDCATALOG-REF_TABLE = MTABLE_N .
      APPEND WA_FIELDCATALOG TO IT_FIELDCATALOG .
    ENDLOOP .
    CALL METHOD CL_ALV_TABLE_CREATE=>CREATE_DYNAMIC_TABLE
    EXPORTING
    IT_FIELDCATALOG = IT_FIELDCATALOG
    IMPORTING
    EP_TABLE = MITAB .
    ASSIGN MITAB->* TO <FS_ITAB> .
    DYNAMIC_IT_INSTANTIATED = 'X' .
ENDIF.
ENDFORM. " INSTANTIATE_DYNAMIC_INTERNAL_T
FORM SHOW_CONTENTS.
CLEAR : <FS_ITAB> .
SELECT * FROM (MTABLE_N)
INTO CORRESPONDING FIELDS OF TABLE <FS_ITAB> .
I_CALLBACK_PROGRAM = SY-REPID .
CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
       EXPORTING
            I_CALLBACK_PROGRAM = I_CALLBACK_PROGRAM
            IT_FIELDCAT        = IT_FIELDCAT[]
       TABLES
            T_OUTTAB           = <FS_ITAB>
       EXCEPTIONS
            PROGRAM_ERROR      = 1
            OTHERS             = 2.
ENDFORM. " SHOW_CONTENTS
FORM CHECK_FILE_TO_UPLOAD.
PERFORM CHECK_FILENAME.
CALL FUNCTION 'WS_UPLOAD'
       EXPORTING
            FILENAME                = MFILENAM
            FILETYPE                = 'DAT'
       TABLES
            DATA_TAB                = <FS_ITAB>
       EXCEPTIONS
            CONVERSION_ERROR        = 1
            FILE_OPEN_ERROR         = 2
            FILE_READ_ERROR         = 3
            INVALID_TYPE            = 4
            NO_BATCH                = 5
            UNKNOWN_ERROR           = 6
            INVALID_TABLE_WIDTH     = 7
            GUI_REFUSE_FILETRANSFER = 8
            CUSTOMER_ERROR          = 9
            OTHERS                  = 10.
IF SY-SUBRC EQ 0.
    I_CALLBACK_PROGRAM = SY-REPID .
    CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
         EXPORTING
              I_CALLBACK_PROGRAM = I_CALLBACK_PROGRAM
              IT_FIELDCAT        = IT_FIELDCAT[]
         TABLES
              T_OUTTAB           = <FS_ITAB>
         EXCEPTIONS
              PROGRAM_ERROR      = 1
              OTHERS             = 2.
ENDIF .
ENDFORM. " CHECK_FILE_TO_UPLOAD
Message was edited by:
        SAURABH SINGH
        SENIOR EXECUTIVE
        SAMSUNG INDIA ELECTRONICS LTD.,NOIDA

Store data in R/3 without page refresh

Dear BSP-Masterminds,
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Regards
Nicola
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Eddy
PS. Reward the useful answers and you will get <a href="http:///people/baris.buyuktanir2/blog/2007/04/04/point-for-points-reward-yourself">one point</a> yourself!

SAP MII 14.0 SP5 Patch 11 - Error has occurred while processing data stream Dynamic Query role is not assigned to the Data Server

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I have an iMac with 2 internal drives and a multiple user account set-up. Hw do I create a path to store data files on the second drive within an application?

This is the Mac mini forum not the iMac forum however...
Applications written for average users like Photoshop, Word, i.e. GUI based applications provide a 'Save' dialog box which while allow selecting second drives or any drive. The dialob box initially shown might be in the simple mode but you just need to click on the triangle to show the full set of options. You should then see the different drive names amongst other options.
If your referring to an application your writing yourself then you need to build a pathname. This can be in one of two styles depending on the programming system your using. This could be a POSIX style path or a Mac style path.
POSIX = /Volumes/volname/foldername
Mac style = Volname:foldername:

I have a Time Capsule with 2tb of storage, and an I-Mac with 500Gb. (which is at capacity) Can I use the Time Capsule to store data in addition to backing up the hard drive?

I have a Time Capsule with 2tb of storage, and an I-Mac with 500Gb. (which is at capacity) Can I use the Time Capsule to store data from my hard drive that I want to access later in addition to backing up the hard drive?

Can I use the Time Capsule to store data from my hard drive that I want to access later in addition to backing up the hard drive?
Yes, but if you move the "original" data on your iMac to the Time Capsule....then the "original" data is now on the Time Capsule disk.
When...not if...the Time Capsule disk has a problem, you have no backups for this data.
Perhaps a much safer plan might be to add an external hard drive attached directly to your iMac. Then, move the data to that drive from the iMac.
Now, Time Machine will back up both your iMac and the external hard drive so you have "originals" on one drive and backups on another. Would that plan work for you?

Store dates in UTC, view in SESSIONTIMEZONE

Hi,
I have users in many time zones - each with daylight savings rules - and I want to store dates on the database in UTC/GMT.
In order to get them displaying in local time in ApEx, I have done the following:
- Set the SESSIONTIMEZONE in the VPD security section
- Convert from UTC to SESSIONTIMEZONE in the "Post Calculation Computation" option of the screen item as it is displayed
- Convert from SESSIONTIMEZONE to UTC in a Calculation when the row is saved back
I have tried to get this working with the data type TIMESTAMP WITH TIME ZONE. It does the conversion to UTC OK, but the time zone stored on the database is the SESSIONTIMEZONE. I have to stick to the format model associated with the ApEx DatePicker I am using, which does not include a time zone, so I cannot explicitly instruct the Automatic Row Processing which zone to write.
Surely there is an easier way.
Should I just abandon the TIMESTAMP WITH TIME ZONE and go with TIMESTAMP or DATE? Then the UTC zone would just be implicit on the database.

Check out the already existing thread about this: iTunes8 - How to turn off genre and links to shop in the browser?

Sychronize AO/AI buffered data graph and measure data more than buffer size

I am trying to measure the response time (around 1ms) of the pressure drop indicated by AI channel 0 when the AO channel 0 gives a negetive single pulse to the unit under test (valve). DAQ board: Keithley KPCI-3108, LabView Version: 6.1, OS system: Win2000 professional.
My problem is I am getting different timed graph between the AI and AO channels every time I run my program, except the first time I can get real time graph. I tried to decrease the buffer size less than the max buffer size of the DAQ board (2048 samples), but it still does unreal time graph from AI channel, seems it was still reading from old data in the buffer when AO writes the new buffer data, that is my guessing. In my p
rogram, the AO and AI part is seperated, AO Write buffer is in a while loop while AI read is not. Would that be a problem? Or it's something else?
Also, I am trying to measure data much larger than the board buffer size limit. Is it possible to make the measurement by modifying the program?
I really appreciate any of your help. Thank you very much!
Best,
Jenna

Jenna,
You can modify the X-axis of a chart/graph in LabVIEW to display real-time. I have included a link below to an example program that illustrates how to do this.
If you are doing a finite, buffered acquisition make sure that you are always reading everything from the buffer for each run. In other words, If you set a buffer size of 5000, then make sure you are reading 5000 scans (set number of scans to read to 5000). This will assure you are reading new data every time you run you program. You could always put the AI Read VI within a loop and read a smaller number from the buffer until the buffer is empty (monitor the scan backlog output of the AI Read VI to see how many scans are left in the buffer).
You can set a buffer size larger than the FIFO
buffer of the hardware. The buffer size you set in LabVIEW is actually a software buffer size within your computer's memory. The data is acquired with the hardware, stored temporarily within the on-board FIFO, transferred to the software buffer, and then read in LabVIEW.
Are you trying to create a TTL square wave with the analog output of the DAQ device? If so, the DAQ device has counters that can generate a highly accurate digital pulse as well. Just a suggestion. LabVIEW has a variety of shipping examples that are geared toward using counters (find examples>>DAQ>>counters). I hope this helps.
Real-Time Chart Example
http://venus.ni.com/stage/we/niepd_web_display.DISPLAY_EPD4?p_guid=B45EACE3E95556A4E034080020E74861&p_node=DZ52038&p_submitted=N&p_rank=&p_answer=&p_source=Internal
Regards,
Todd D.
National Instruments
Applications Engineer

How to populate data from dynamic drop down list to the text field

Hi,
I tried to populate data from dynamic drop down list to city field. I would like to concat data from drop down list.When selecting add button to add the item and select item from drop down list, data should be displayed in the text field. However, Please help. I spent alot of time to make it works I am not successful.
Please see the link below.
https://acrobat.com/#d=SCPS0eVi6yz13ENV0cnUdw
Thanks for your help
Cindy

Hi Rosalin,
Loop the hidden table, get the values and populate drop down in each iteration.
DropDownList1.addItem("Text","Value");
You can use one more solution for this scenario. If it is a matter of 2,3 dropdowns, put three dropDowns in the form layout and give seperate static data binding to them. At run time make the dropDowns hide/visible as per the requirement.
Hope this helps.
Thanks & Regards,
Sanoosh

Store data in dynamic buffer

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