Need help on complex math calculation in labview

I need some help by being pointed in the right direction.  I have a piece of old lab equipment that I will be connecting to labview.  In order to send commands to the hardware, I have to calculate a checksum.  The checksum algorythm requires me to take alphanumeric characters, convert them to binary, perform binary addition, perform an Xor, mask certain digits, and convert the resultant binary string back to an ascii character.  Does labview have the capabilities to do this on it's own, or should I look at connecting to something like an external dll? 
I have Visual Studio 2008 and some previous VB experience, so I think I could write a program that would do the calculation, but don't really know exactly what type of project (dll, etc.) is best.  Are there any specific settings for the dll so that labview can use it.  I see an example for C++ for Visual Studio 2005, but that is as close as I can get.  I only know VB, not C# or C++
Can someone please point me in the right direction?
Tron
Solved!
Go to Solution.

You basically need some logical shifts and ANDs.
Check version 2.
/Y
LabVIEW 8.2 - 2014
"Only dead fish swim downstream" - "My life for Kudos!" - "Dumb people repeat old mistakes - smart ones create new ones."
G# - Free award winning reference based OOP for LV
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Checksum ver 2.vi ‏10 KB

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         private JButton b1 = new JButton("+");
         private JButton b2 = new JButton("-");
         private JButton b3 = new JButton("*");
         private JButton b4 = new JButton("/");
         public Aritmetik(){
              Container v = getContentPane();
              v.setLayout(new GridLayout(5,2));
              v.add(l1);
              v.add(t1);
              v.add(l2);
              v.add(t2);
              v.add(b1);
              v.add(b2);
              v.add(b3);
              v.add(b4);
              v.add(l3);
              v.add(l4);
              b1.addActionListener(this);
              b2.addActionListener(this);
              b3.addActionListener(this);
              b4.addActionListener(this);
              pack();
              setVisible(true);
              setDefaultCloseOperation(EXIT_ON_CLOSE);
         public void actionPerformed(ActionEvent e){
              int tal1 = Integer.parseInt(t1.getText());
              int tal2 = Integer.parseInt(t2.getText());
                   if(e.getSource() == b1){
              if(t1.getText().equals("") || t2.getText().equals(""))
                                       JOptionPane.showMessageDialog(null, "Mata in tal!");
                   else{
                        l3.setText("Resultat ");
                   l4.setText(" " + (tal1+tal2));
                   else if(e.getSource() == b2){
                        int sub = tal1-tal2;
                        l4.setText(" " + (sub));
                   else if(e.getSource() == b3){
                        int multi = tal1*tal2;
                        l4.setText(" " + (multi));
                   else if(e.getSource() == b4){
                        int div = tal1/tal2;
                        l4.setText(" " + (div));
                   public static void main(String[] arg){
                   Aritmetik A =new Aritmetik();

    Here is your problem:
    public void actionPerformed(ActionEvent e){
      int tal1 = Integer.parseInt(t1.getText().trim());  // add the trim()
      int tal2 = Integer.parseInt(t2.getText().trim());  // add the trim()
      if(e.getSource() == b1){
        if(t1.getText().equals("") || t2.getText().equals(""))
          JOptionPane.showMessageDialog(null, "Mata in tal!");
        else{
          l3.setText("Resultat ");
          l4.setText(" " + (tal1+tal2));
      }... Better ...
    public void actionPerformed(ActionEvent e)  throws NumberFormatException {
      String tala = t1.getText().trim();
      String talb = t2.getText().trim();
      if ( tala == null  ||  "".equals(tala)  ||  talb == null  ||  "".equals(talb) ) {
        JOptionPane.showMessageDialog(null, "Mata in tal!");
        return();
      int tal1 = Integer.parseInt(tala);
      int tal2 = Integer.parseInt(talb);
      if(e.getSource() == b1){
        l3.setText("Resultat ");
        l4.setText(" " + (tal1+tal2));
      else if(e.getSource() == b2){
        int sub = tal1-tal2;
        l4.setText(" " + (sub));
      else if(e.getSource() == b3){
        int multi = tal1*tal2;
        l4.setText(" " + (multi));
      else if(e.getSource() == b4){
        int div = tal1/tal2;
        l4.setText(" " + (div));
    }Message was edited by:
    abillconsl

  • Need help regarding complex calculation using Max value and limiting data after Max date in MDX

    I am working on a bit complex calculated measure in SSAS cube script mode.
    Scenario /Data Set
    Date
    A
    B
    C
    A+B
    5/29/2014
    Null
    34
    Null
    34
    6/30/2014
    Null
    23
    45
    68
    7/15/2014
    25
    -25
    Null
    0
    8/20/2014
    -34
    Null
    Null
    -34
    9/30/2014
    25
    Null
    60
    25
    10/15/2014
    45
    -45
    Null
    0
    11/20/2014
    7
    8
    Null
    15
    a) Need to capture latest non-null value of Column C based on date
    with above example it should be 60 as of 9/30/2014
    b) Need to capture column A+B for all dates.
    c) Add values from column (A+B) only after latest date which is after 9/30/2014. 
    with above example it's last 2 rows and sum is 15
    d) Finally add value from step a and step c. which means the calc measure value should be = 75
    I need to perform all this logic in MDX. I was able to successfully get step a and b in separate calc measure, however i am not sure how to limit the scope based on certain date criteria. In this case it's, date> Max date(9/30/2014) . Also how should
    i add calculated members and regular members?
    I was able to get max value of C based on date and max date to limit the scope.
    CREATE MEMBER CURRENTCUBE.[Measures].[LatestC] AS
    TAIL( 
      NONEMPTY(
        [Date].[Date].CHILDREN*[Measures].[C]),1).ITEM(0) ,visible=1;
    CREATE MEMBER CURRENTCUBE.[Measures].[MaxDateofC] AS
    TAIL( 
      NONEMPTY(
        [Date].[Date].CHILDREN,[Measures].[C]),1).ITEM(0).MemberValue ,visible=1;
    Please help with Scope statement to limit the aggregation of A+B for dates > MaxDateofC? Also further how to add this aggregation value to LatestC calc measure?
    Thank You

    Hi Peddi,
    I gave TRUNC to both of the dates. But still the same issue. I think the problem is in returning the BolbDomain.
    return blobDomain;
    } catch (XDOException xdoe) {
    System.out.println("Exception in XDO :");
    throw new OAException("Exception in XDO : "+xdoe.getMessage());
    catch (SQLException sqle) {
    System.out.println("Exception in SQL :");
    throw new OAException("SQL Exception : "+sqle.getMessage());
    catch (OAException e) {
    System.out.println("Exception in OA :");
    throw new OAException("Unexpected Error :: " +e.getMessage());
    Thanks and Regards,
    Myvizhi

  • I need help with this program ( Calculating Pi using random numbers)

    hi
    please understand that I am not trying to ask anymore to do this hw for me. I am new to java and working on the assignment. below is the specification of this program:
    Calculate PI using Random Numbers
    In geometry the ratio of the circumference of a circle to its diameter is known as �. The value of � can be estimated from an infinite series of the form:
    � / 4 = 1 - (1/3) + (1/5) - (1/7) + (1/9) - (1/11) + ...
    There is another novel approach to calculate �. Imagine that you have a dart board that is 2 units square. It inscribes a circle of unit radius. The center of the circle coincides with the center of the square. Now imagine that you throw darts at that dart board randomly. Then the ratio of the number of darts that fall within the circle to the total number of darts thrown is the same as the ratio of the area of the circle to the area of the square dart board. The area of a circle with unit radius is just � square unit. The area of the dart board is 4 square units. The ratio of the area of the circle to the area of the square is � / 4.
    To simuluate the throwing of darts we will use a random number generator. The Math class has a random() method that can be used. This method returns random numbers between 0.0 (inclusive) to 1.0 (exclusive). There is an even better random number generator that is provided the Random class. We will first create a Random object called randomGen. This random number generator needs a seed to get started. We will read the time from the System clock and use that as our seed.
    Random randomGen = new Random ( System.currentTimeMillis() );
    Imagine that the square dart board has a coordinate system attached to it. The upper right corner has coordinates ( 1.0, 1.0) and the lower left corner has coordinates ( -1.0, -1.0 ). It has sides that are 2 units long and its center (as well as the center of the inscribed circle) is at the origin.
    A random point inside the dart board can be specified by its x and y coordinates. These values are generated using the random number generator. There is a method nextDouble() that will return a double between 0.0 (inclusive) and 1.0 (exclusive). But we need random numbers between -1.0 and +1.0. The way we achieve that is:
    double xPos = (randomGen.nextDouble()) * 2 - 1.0;
    double yPos = (randomGen.nextDouble()) * 2 - 1.0;
    To determine if a point is inside the circle its distance from the center of the circle must be less than the radius of the circle. The distance of a point with coordinates ( xPos, yPos ) from the center is Math.sqrt ( xPos * xPos + yPos * yPos ). The radius of the circle is 1 unit.
    The class that you will be writing will be called CalculatePI. It will have the following structure:
    import java.util.*;
    public class CalculatePI
    public static boolean isInside ( double xPos, double yPos )
    public static double computePI ( int numThrows )
    public static void main ( String[] args )
    In your method main() you want to experiment and see if the accuracy of PI increases with the number of throws on the dartboard. You will compare your result with the value given by Math.PI. The quantity Difference in the output is your calculated value of PI minus Math.PI. Use the following number of throws to run your experiment - 100, 1000, 10,000, and 100,000. You will call the method computePI() with these numbers as input parameters. Your output will be of the following form:
    Computation of PI using Random Numbers
    Number of throws = 100, Computed PI = ..., Difference = ...
    Number of throws = 1000, Computed PI = ..., Difference = ...
    Number of throws = 10000, Computed PI = ..., Difference = ...
    Number of throws = 100000, Computed PI = ..., Difference = ...
    * Difference = Computed PI - Math.PI
    In the method computePI() you will simulate the throw of a dart by generating random numbers for the x and y coordinates. You will call the method isInside() to determine if the point is inside the circle or not. This you will do as many times as specified by the number of throws. You will keep a count of the number of times a dart landed inside the circle. That figure divided by the total number of throws is the ratio � / 4. The method computePI() will return the computed value of PI.
    and below is what i have so far:
    import java.util.*;
    public class CalculatePI
      public static boolean isInside ( double xPos, double yPos )
         double distance = Math.sqrt( xPos * xPos + yPos * yPos );        
      public static double computePI ( int numThrows )
        Random randomGen = new Random ( System.currentTimeMillis() );
        double xPos = (randomGen.nextDouble()) * 2 - 1.0;
        double yPos = (randomGen.nextDouble()) * 2 - 1.0;
        int hits = 0;
        int darts = 0;
        int i = 0;
        int areaSquare = 4 ;
        while (i <= numThrows)
            if (distance< 1)
                hits = hits + 1;
            if (distance <= areaSquare)
                darts = darts + 1;
            double PI = 4 * ( hits / darts );       
            i = i+1;
      public static void main ( String[] args )
        Scanner sc = new Scanner (System.in);
        System.out.print ("Enter number of throws:");
        int numThrows = sc.nextInt();
        double Difference = PI - Math.PI;
        System.out.println ("Number of throws = " + numThrows + ", Computed PI = " + PI + ", Difference = " + difference );       
    }when I tried to compile it says "cannot find variable 'distance' " in the while loop. but i thought i already declare that variable in the above method. Please give me some ideas to solve this problem and please check my program to see if there is any other mistakes.
    Thanks a lot.

    You've declared a local variable, distance, in the method isInside(). The scope of this variable is limited to the method in which it is declared. There is no declaration for distance in computePI() and that is why the compiler gives you an error.
    I won't check your entire program but I did notice that isInside() is declared to be a boolean method but doesn't return anything, let alone a boolean value. In fact, it doesn't even compute a boolean value.

  • Need Help with complex query for productio database

    Hello again,
    i need your help again, for an query how Shows me how long every production step takes per Order.
    See sample data and what i expect.
    Thank you all for your help.
    We use Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
    Here the sample data tables:
    CREATE      TABLE      TABLE_2
    (     "ORDER_NR"      VARCHAR2 (12)
    ,      "PRIORITY"      VARCHAR2 (2)
    ,      "WO_STEP"      VARCHAR2 (1)
    ,      "STEP_DATE"      DATE
    CREATE      TABLE      TABLE_1
    (     "ORDER_NR"           VARCHAR2     (12) PRIMARY KEY
    ,      "PRIORITY"           VARCHAR2      (2)
    ,      "CREATE_DATE"      DATE
    ,     "ACT_STEP"          VARCHAR2     (2)
    ,     "STEP_DATE"          DATE
    ,     "EMPLOYEE"          VARCHAR2     (5)
    ,     "DESCRIPTION"     VARCHAR2     (20)
    INSERT      INTO      TABLE_1      (ORDER_NR,               PRIORITY,      CREATE_DATE,                                                        ACT_STEP,     STEP_DATE,                                                            EMPLOYEE,     DESCRIPTION)
                        VALUES           ('1KKA1T205634',     '12',          TO_DATE('10-FEB-13 10:00:00','DD-MON-RR HH24:MI:SS'),     'U',          TO_DATE('28-FEB-13 12:00:00','DD-MON-RR HH24:MI:SS'),     'W0010',     'CLEAN HOUSE');
    INSERT      INTO      TABLE_1      (ORDER_NR,               PRIORITY,     CREATE_DATE,                                                        ACT_STEP,     STEP_DATE,                                                            EMPLOYEE,     DESCRIPTION)
                        VALUES           ('1KKA1Z300612',     '12',          TO_DATE('08-FEB-13 14:00:00','DD-MON-RR HH24:MI:SS'),     'F',          TO_DATE('20-FEB-13 16:00:00','DD-MON-RR HH24:MI:SS'),     'K0052',     'REPAIR CAR');
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1T205634',     '12',          'A',          TO_DATE('12-FEB-13 13:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1T205634',     '12',          '5',          TO_DATE('13-FEB-13 09:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1T205634',     '12',          'K',          TO_DATE('13-FEB-13 10:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1T205634',     '12',          '5',          TO_DATE('13-FEB-13 11:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1T205634',     '12',          'K',          TO_DATE('13-FEB-13 12:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1T205634',     '12',          '5',          TO_DATE('13-FEB-13 16:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1T205634',     '12',          'C',          TO_DATE('14-FEB-13 08:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1T205634',     '12',          'B',          TO_DATE('14-FEB-13 10:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1T205634',     '12',          'E',          TO_DATE('18-FEB-13 13:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1T205634',     '12',          'F',          TO_DATE('20-FEB-13 16:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1T205634',     '12',          'S',          TO_DATE('21-FEB-13 08:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1T205634',     '12',          'R',          TO_DATE('21-FEB-13 09:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1T205634',     '12',          'U',          TO_DATE('28-FEB-13 12:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1Z300612',     '12',          'A',          TO_DATE('12-FEB-13 13:52:42','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1Z300612',     '12',          '5',          TO_DATE('13-FEB-13 09:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1Z300612',     '12',          'K',          TO_DATE('13-FEB-13 10:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1Z300612',     '12',          '5',          TO_DATE('13-FEB-13 11:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1Z300612',     '12',          'K',          TO_DATE('13-FEB-13 12:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1Z300612',     '12',          '5',          TO_DATE('13-FEB-13 16:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1Z300612',     '12',          'C',          TO_DATE('14-FEB-13 08:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1Z300612',     '12',          'B',          TO_DATE('14-FEB-13 10:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1Z300612',     '12',          'E',          TO_DATE('18-FEB-13 13:00:00','DD-MON-RR HH24:MI:SS'));
    INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                        VALUES           ('1KKA1Z300612',     '12',          'F',          TO_DATE('20-FEB-13 16:00:00','DD-MON-RR HH24:MI:SS'));
    COMMIT;And here is what i expect from my query:
    SYSDATE     28.Feb.13 14:00                                                                                     
    ORDER_NR     PRIORITYCREATE_DATE     STATUS     STATUS_DATE     DESCRIPTION     AGE_1     AGE_2     WAITNG     STEP_A     STEP_B     STEP_C     STEP_5     STEP_K     STEP_E     STEP_F     STEP_S     STEP_R     
    1KKA1T205634     12     10.Feb.13 10:00     U     28.Feb.13 12:00     CLEAN HOUSE     18,083     8,833     2,125     0,833     4,125     0,083     0,750     0,208     2,125     0,666     0,042     7,125     
    1KKA1Z300612     12     08.Feb.13 14:00     F     20.Feb.13 16:00     REPAIR CAR     20,000     16,042     2,125     0,833     4,125     0,083     0,750     0,208     2,125     0,666          And now the explanation to the query result:
    The AGE_1 is the difference in days between the 'CREATE_DATE' and IF EXSIST the STEP 'U' then STEP_DATE or if the STEP 'U' is not found in TABLE_2 then it should show the difference in days between the 'CREATE_DATE' and the 'SYSDATE'
    The AGE_2 is the difference in days between the STEP 'A' STEP_DATE and IF EXSIST the STEP 'R' then STEP_DATE or if the STEP 'R' is not found in TABLE_2 then it should show the difference in days between the 'CREATE_DATE' and the 'SYSDATE'
    The WAITING is the difference in days between CREATE_DATE and STEP 'A' STEP_DATE
    The following columns show the days how long the ORDER_NR stays in these STEP, if an ORDER_NR comes into the same STEP more then one time it should be calculated together.
    If the ORDER_NR skips a step it should show a zero in the specific field.
    I hope my explanation is good enough, my english skills are far away from good.
    Thanks all for your help.
    Greets Reinhard W.

    Hi,
    i changed this query:
    with t2 as (
                select  t.*,
                        lead(step_date) over(partition by order_nr order by step_date) next_step_date
                  from  table_2 t
    select  t1.*,
            nvl(
                max(
                    case t2.wo_step
                      when 'U' then t2.step_date
                    end
               sysdate
              ) - t1.create_date age_1,
            nvl(
                max(
                    case t2.wo_step
                      when 'R' then t2.step_date
                    end
               sysdate
              ) - t1.create_date age_2,
            sum(
                case t2.wo_step
                  when 'B' then t2.next_step_date - t2.step_date
                end
               ) step_b
      from  table_1 t1,
            t2
      where t2.order_nr = t1.order_nr
      group by t1.order_nr,
               t1.priority,
               t1.create_date,
               t1.act_step,
               t1.step_date,
               t1.employee,
               t1.descriptionTo this:
    with t2 as (
                select  t.*,
                        lead(step_date) over(partition by order_nr order by step_date) next_step_date
                  from  table_2 t
    select  t1.order_nr,
            nvl(
                max(
                    case t2.wo_step
                      when 'U' then t2.step_date
                    end
               sysdate
              ) - t1.create_date age_1,
            nvl(
                max(
                    case t2.wo_step
                      when 'R' then t2.step_date
                    end
               sysdate
              ) - t1.create_date age_2,
            sum(
                case t2.wo_step
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