Generation of random values

Similar Questions

• DMA FIFO - random values?

  iHi.

  My apologies if this is the wrong Board... not sure where it should go! Just to clarify from the outset, I cannot share screws due to issues of IP etc... sigh.

  Basically I have a sbRio 9626 and the software that runs on the FPGA to interface with analog converters / digital external. This is done using a machine to States (single cycle loop timed with a structure of business inside, so it passes between cases each tick of the clock FPGA). In one of the cases (the States), I have a little routine that takes data from the ADC and place it in a buffer FIFO of DMA of target-to-host. In fact, there are 4 FIFO DMA buffers to send various information and the value of the sample. It is then read by the software on the host of RT and processed to produce an array of values which I then send to the PC using a shared variable.

  What I wanted to check, is that data sent from FPGA to RT host (and PC) are contiguous (that is, I have my right to lengths FIFO). I modified the code FPGA to use a counter instead of the data sampled for the FIFO must simply send numbers in a sequence (1, 2, 3, 4, etc.). I then examine this sequence to ensure that it is correct, and no data has been overwritten.

  I think it's the FIFOs, 2, 3 and 4 are very good. FIFO 1 sends data that is continuous but every now and then I seem to get a glitch at random. This glitch is * not * appear to be due to lengths of FIFO, but seems to be an error in the data transfer. For example, I get something like 1, 2, 3, x, 5, 6, 7, y with x and y the seemingly random values. The positions x and y in the sequence are also seemingly random - they have not held in the same place every time. Code written to the FIFO 1 is * exactly * the same thing others - in fact, it's the same group of data being written.

  Has anyone seen anything like this before? I am trying to determine if it is due to the goal to receive FIFO or some problem with the shared variable in the network. Any suggestions as to what I could check? It almost seems as if there is IME peaks on the transfer... does not suggest this is the case but it gives an idea of what I see. I'm using Labview 2013 and BIOS on the sbRio is up-to-date. I have sbRio another I'll try again later to see if the problem is specific to a particular board.

  It seems that you have found the wrong path here: since you are dealing with the programming of FPGA, which is essentially played woth LabVIEW you should post this question to the Office of LabVIEW or, perhaps, to the Office LabVIEW Embedded

• Random values in the transmission of TCP

  Hello

  I capture a unique setting in grayscale (160 x 120) and sent via TCP to a C program. The problem is that, before the reading of the values of actual pixels in the console, the first 8 bytes is composed of some two random values "120" and "160", as shown in the image below. It seems that these two values are 32-bit unsigned integers, since each represents 4 bytes. The values come from the LabVIEW code below?

  

  

  Have you not already answered this in your original message thread?  http://forums.NI.com/T5/LabVIEW/sending-8-bit-unsigned-integer-in-LabVIEW/m-p/2695753

  That you marked as resolved?

  The one where it was mentioned that flatten chain has an entry on whether or not you want to prepend the size of tables?

  Do you really think the values of 160 and 120 'random' when in your post you mentioned even you have a table of 160 x 120?

• Duplicate in the same random value in the composition.

  Is this possible? How can I do with expressions?

  Thank you.

  Well, nothing prevents you to just spit a random value on a global scale, then by linking all your other expressions to it. And the random() method accepts arrays as well if you want it spit only specific predetermined values. You need to read about such things. It is not still own EI, just generic JavaScript.

  Mylenium

• random values

  I want to create random values for a particular column.
  
  create table employee1 (empno, ename varchar2 (50), eword varchar2 (5), issue 4, tdate date default sysdate);
  
  
  Insert into employee1 (4200, 'Hyderabad1', random, sysdate values);
  
  
  the random value should be 5 digit only.
  No spaces.

  create table employee1(empno number(4), ename varchar2(50), eword varchar2(5), tdate date default sysdate);
  insert into employee1 values (4200,'Hyderabad1',dbms_random.string('X',5) , sysdate);
  
  1 rows inserted
  
  select * from employee1
  
  EMPNO                  ENAME                                              EWORD TDATE
  ---------------------- -------------------------------------------------- ----- -------------------------
  4200                   Hyderabad1                                         QWBIR 03-MAY-12                 
  
  1 rows selected
  

• How to apply the random value "seed" to multiple images

  So, I'm in a weird situation, have been surfing the net for the solution for more than a day now and can't really find the solution.

  What is it?

  Its a small school project I chose and can't really find a way to do it.

  What I want to achieve?

  I have an image and I want to have like 50 variations of it.

  What have I done?

  I have loaded an image, performed an action that applies the filter called "Wave", the wave dialog I selected a rangeminimum and maximum values.

  The problem I have:

  I made 50 copies of the same image, and then I applied the action through treatment for these 50 images in batches. However, it applies exactly the same settings/values that I saved. It does not really use the beach that is the maximum and minimum values , I selected in the wave dialog box. It seems that when I closed the wave dialog box, the action creates a new value called 'Random seed' when recording and maybe this number seed tells photoshop what to choose between the min and max range provided by the user.

  So is it possible that when I run the action, he'll be looking for a new random value in the range max and the min provided?

  Thank you

  Marolina

  Save the script below in the text with the .jsx extension. Replace the wave filter step in your action with a step that runs the script. The rest of the action can stay the same.

  // seed range detemined by running the filter with the desired settings 10 times
  // and getting the lower and upper range from the scriptlistener log
  // the seed seems to depend on the other values. In another test the seed was
  // a 8 digit number
  var seed = Math.floor((192000-186000)*Math.random()) + 186001;
  app.activeDocument.activeLayer.applyWave(1,93,198,5,35,100,100,WaveType.SINE,UndefinedAreas.REPEATEDGEPIXELS,seed);
  

• Assign a random value to column?

  I have a Table with a single column, numeric field, about 1/2 million documents.
  
  I want to add another column, VARCHAR2 and distributed way random value of ' a ',' B', 'C', has '.
  
  The seed for Random can't be perfect, I just need to fill it with random data.
  so that I can do a test in this Table for a different query, thank you!
  
  Am on Oracle 10 g 2

  You can try like this,

  update table_name
     set column_name = chr (64 + round (dbms_random.value ( 1, 4)))
  

  G.

• Random value of a circle...!

  Hi all

  I need to get a random value xy of a circle, for example going to propagate circles on stage randomly. Its quiet easy to spread the circle in a square.

  This has been done here...

  ----------------------------------------------------------

  var MC:MovieClip = new MovieClip();

  var squareWidth:Number = 200;
  var squareHeight:Number = 200;

  for (var i: int = 0; i < = 100; i ++) {}
  MC = drawCircle ();
  MC.id = i;
  MC.x = Math.random () * squareWidth;
  MC.y = Math.random () * squareHeight;
  addChild (MC);
  }

  function drawCircle() {}
  var circle: MovieClip = new MovieClip();
  circle.graphics.beginFill (0xFF6600);
  circle.graphics.drawCircle (0,0,10);
  return (circle);
  }

  ----------------------------------------------------------

  Anyone modify this code and propagate these circle inscribed in a circle?

  How about something like this?

  var MC:MovieClip = new MovieClip();

  var squareWidth:Number = 200;
  var squareHeight:Number = 200;

  var boundsRadius:Number = Math.min(squareWidth, squareHeight) 2;
  var boundsCenterPoint:Point = new Point (squareWidth/2, squareHeight/2);
  var circleAnchorPoint:Point;

  Draw a circle to see the limit - REMOVE
  graphics.beginFill (0,0);
  graphics.lineStyle (1,0,1);
  graphics.drawCircle (boundsCenterPoint.x, boundsCenterPoint.y, boundsRadius);

  for (var i: int = 0; i<=100; i++)="">
  MC = drawCircle ();
  MC.id = i;
  circleAnchorPoint = Point.polar)
  (Math.Random () * boundsRadius);
  (((Math.random () * 360) * Math.PI) / 180)
  );
  circleAnchorPoint.offset (boundsCenterPoint.x, boundsCenterPoint.y);

  MC.x = circleAnchorPoint.x;
  MC.y = circleAnchorPoint.y;
  addChild (MC);
  }

  function drawCircle() {}
  var circle: MovieClip = new MovieClip();
  circle.graphics.beginFill (0xFF6600);
  circle.graphics.drawCircle (0,0,10);
  return (circle);
  }

• Column update with random values

  Hi all
  
  I have a chart in which one of the columns contains the number. I want to write a script that will update the column number with different random values.
  
  Basically, my script should take the first line of a table and should update with a random value in the second loop, it must update the column with a random value.
  
  I need a simple PL SQL code to do this.
  
  Thanks in advance.
  
  Thank you.
  
  Kind regards
  Dirasa

  or

  update table_name set column_name=round(dbms_random.value(1,100));
  

  Do not loop, this single update statement will satisfy your need by your request above.

  arguments passed in 1 100 are the lower and upper limit to generate random numbers. like 5,1,45,64,23 etc.

  Sample of run...

  PRAZY@11gR1> select * from test;
  
          ID
  ----------
           1
           2
           3
           4
           5
  
  Elapsed: 00:00:00.00
  PRAZY@11gR1> update test set id=round(dbms_random.value(1,100));
  
  5 rows updated.
  
  Elapsed: 00:00:00.00
  PRAZY@11gR1> select * from test;
  
          ID
  ----------
           2
          85
          58
          45
          27
  
  Elapsed: 00:00:00.00
  

  Kind regards
  Prazy

  Published by: Prazy on March 17, 2010 17:35

• SQL how to choose random values where clause?

  Hello guys,.
  
  for example, I want to choose 25 numbers in the answer column which is end 6?
  
  
  
  Select the number of numbers where regexp_like (number, $ 6 '); Like that, but I don't want every number that ends with 6 I want to only 25 of them?
  
  
  Thank you very much.

  953116 wrote:
  How can I choose at random?

  SELECT *
    FROM (  SELECT number
              FROM numbers
             WHERE REGEXP_LIKE (number, '6$')
          ORDER BY DBMS_RANDOM.VALUE)
   WHERE ROWNUM < 26
  

• Package to generate random values, based on a model

  I need to generate thousands of test strings based on a template (LLNNNNLL, where L stands for letter and N represents the numbers).
  I was able to create, on a table, any useful combination: the next step is to get that 'good' a few tickets.
  
  My problem is that using the following syntax I get tickets with "close to" number... just because I created using a sequence

  SELECT TICKET_CODE
  FROM TICKET_WELL SAMPLE (1) 
  WHERE OWNER = 'OWNER_NAME'
  AND rownum < 10;

  I mean: AB1001CD, AC1003CB, BB1002AD...
  while I need to get these tickets: AB1001CD, AC4667CD, SD8592GD etc...
  
  First question: is there a like DBMS_RANDOM package that accepts as input a boss so I can simply replace MY package to create the TICKET_WELL table?
  Second: Is there another way (right) to select a table trying to get the lines in a random order?
  Third: If both answers are not... is there a way to mix the rows of a table to another?
  
  Any suggestions are welcome.
  
  Thank you
  Marco

  Here's a function I hit upwards to generate a randon number, based on an input mask.

  create or replace
  function random_string( p_mask           in varchar2)
  return varchar2
  as
  v_random_number integer;
  v_random_letter varchar2(1);
  v_mask varchar2(20) := p_mask;
  v_character varchar2(1);
  v_random_string varchar2(20);
  begin
  for i in 1 .. length(v_mask)
  loop
  if substr(v_mask,i,1) = 'L'
  Then
      v_random_number :=  dbms_random.value(1,26);
      v_character := chr(64+v_random_number);
  elsif substr(v_mask,i,1) = 'N'
  then
     v_random_number := dbms_random.value(0,9);
     v_character     := v_random_number;
  end if;
  v_random_string := v_random_string||v_character;
  end loop;
  return v_random_string;
  end;
  

  To select lines in a random order, you need to store the random number with a column, for example rowno and create an index on rowno.

  create table random_rows
  (rowno number,
    random_string varchar2(20)
  );
  

  then to get a random line, you can use

  declare
  v_rowno integer; -- must be integer
  begin
  v_rowno := dbms_random.value(1, v_rows_in_table);
  select random_string
  into v_random_string
  from random_rows
  where rowno := v_rowno;
  end;
  

  You can also replace the random line of the next generated random_string.
  The only thing is that you can not guarantee that the random_string is unique,
  If you need a unique index on the column of random_string, and he tries to insert a duplicate, you should try to insert another random number;

• Generation 7 random sequence of numbers

  Hello
  
  create sequences centers_seq
  begins with 1234567 increment of 1;
  
  This statement will create and start the sequence 1234567 and increments by 1 while I'm of course unique and trying to generate random 7 digit
  
  Thank you in anticipation
  
  Best regards

  Raakh wrote:
  I want to generate the login ID, but not in a sequence. IDS are 100 steps more so I need to auto generate unique random ID to 7 digits

  Well, you can take a random semi approach:

  SQL> create sequence s start with 100 maxvalue 999
    2  /
  
  Sequence created.
  
  SQL> select s.nextval * 10000 + trunc(dbms_random.value(1000,9999)) unique_semi_random_7_digit_num from dual
    2  /
  
  UNIQUE_SEMI_RANDOM_7_DIGIT_NUM
  ------------------------------
                         1007776
  
  SQL> /
  
  UNIQUE_SEMI_RANDOM_7_DIGIT_NUM
  ------------------------------
                         1017247
  
  SQL> /
  
  UNIQUE_SEMI_RANDOM_7_DIGIT_NUM
  ------------------------------
                         1025913
  
  SQL> /
  
  UNIQUE_SEMI_RANDOM_7_DIGIT_NUM
  ------------------------------
                         1033573
  
  SQL>  
  

  SY.

• How to insert unique random values in 2 columns?

  I have a table with 2 columns
  
  Create table code_for_code)
  first_code varchar2 (10) unique not null,.
  second_code varchar2 (10) not null unique);
  
  and I want to make PL/SQL code to Insert unique values at random in two columns , for example 20 record... How can I do something like that?

  DECLARE
     i   NUMBER := 0;
  BEGIN
     LOOP
        INSERT INTO code_for_code
           SELECT first_code, second_code
             FROM (SELECT DBMS_RANDOM.STRING ('U', 20) first_code,
                          DBMS_RANDOM.STRING ('U', 20) second_code
                     FROM DUAL) a
            WHERE NOT EXISTS (
                     SELECT 1
                       FROM code_for_code
                      WHERE first_code = a.first_code
                        AND second_code = a.second_code);
  
        i := i + 1;
        EXIT WHEN i >= 20;
     END LOOP;
  
     COMMIT;
  END;
  

• Generation of random numbers

  I want to use this procedure to create passwords when configuring new users. I am currently using DBMS_RANDOM.value to generate a number to add to text.
  
  We now define the profile password hard to Guess - 'yes '.
  I can no longer use DBMS_RANDOM.value as it can contain extensible numbers so could not create the FND user account password.
  
  Does anyone know of another package, I can use to generate a string/number of non repetitive random? If not, are there other ways around this problem?
  
  Thank you

  Hello

  [How to randomly generate six unique numbers | http://forums.oracle.com/forums/thread.jspa?messageID=3582323]

  Bartek

• Generation of a value change event internally by the application.

  Hello

  How to generate events programmaticaly change value by using the value property of the signal. I find the solutions on the forum who have the solution but the problem on these solution is this property node are within a while loop, so even if the value does not change an event is triggered that is not desired in my application. Can someone give a solution for this.

  Thank you

  Use a feedback node, and a box Structure so that you only write the property node when the value actually changes.