How to sample a random signal generated by random generator?

I am new to LabVIEW. Please provide me better solution.

Hello,
I apologize for the delayed response.
I took a look at your VI. In its current state, you will not be able to extract Y values for X values in-between those that you plotted. The XY graph is simply connecting your points to provide a visual representation. No real data exists between the points that you plotted.
What you will need to do is first use one of LabVIEW's built-in curve fitting functions to fit a curve to your randomized data. These functions are located on the Analyze >> Mathematics >> Curve Fitting palette.
Once you fit a curve to your data, you will be able to trace the curve with your cursor. You can observe the XY-values that the cursor passes over by displaying the cursor legend. Right click the XY-graph and select Visible
Items >> Cursor Legend.
You may also want to consider using LabVIEW's mathematics functions to evaluate the x-values you are interested in. One solution would be to vertically shift your best-fit curve by the threshold value and evaluate the zeros of the curve using LabVIEW's built-in functions. These functions can be found on the Analyze >> Mathematics >> Zeros palette.
I hope this helps! If you have further questions, let me know.
Matthew C
Applications Engineer
National Instruments

Similar Messages

How to sample an analog signal, simulated on labview and get the sample values.

My project involves this particular detail where i have to sample a simulated sine wave and get the samples and compare them so as to select a particular length for hanning window.Then it also requires me to experiment with the window size so as to get more efficient data out of the sampled signals. please help me with the sampling part and guide me as to how to perform a hanning window operation on the sampled signal. I have directly used the spectral analysis tool which involves getting a FFT spectrum by a default hanning window setting. But since i have to experiment with the window size and variations, guide me with the sampling part and applying a separate hanning window. Thank you.

bhardoo wrote:
My project involves this particular detail where i have to sample a simulated sine wave and get the samples and compare them so as to select a particular length for hanning window.Then it also requires me to experiment with the window size so as to get more efficient data out of the sampled signals. please help me with the sampling part and guide me as to how to perform a hanning window operation on the sampled signal. I have directly used the spectral analysis tool which involves getting a FFT spectrum by a default hanning window setting. But since i have to experiment with the window size and variations, guide me with the sampling part and applying a separate hanning window. Thank you.
What do you mean by i have to sample a simulated sine wave?
the sine generator will provide you with a waveform (or an array of values you can use), there are basic vis to do all this, rigth click on the vi and select help to get detailed information.
Post your vi if you have trouble with details.
How much do you know about LabVIEW and signal theorie?
Greetings from Germany
Henrik
LV since v3.1
“ground” is a convenient fantasy
'˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'

How to use an analog signal to conditionally generate a TTL(or square function) signal?

Hi everyone,
I am using PCI-6229 and trying to develop a code that can generate a TTL/square function signal as soon as one analog input satisfies following conditions: 1. Crossing a certain value (say, 0 V); 2. Falling edge slope. The time delay between the crossing point and newly generated TTL/square signal will be critical in my measurement, and it should not exceed 1 millisecond. Any suggestion on it? Thank you in advance!
Solved!
Go to Solution.

Are you actually using the Excel add-on called Measure? That is what this board is for. Otherwise, you should post to the Multifunction DAQ board and mention the language that you are using.

How to generate pseudo random noise(PRN) binary sequence using shift registers?

what is the block diagram to generate pseudo random noise (PRN) binary sequence of 1's and 0's using shift registers
please help
i need 2 submit this project in this week

This is a fairly simple homework problem. My hints (on the LabVIEW side):
1- look at while loops
2- look at shift registers on while loops with multiple input elements
3-look at the logic components, AND, OR XOR
Look at this wiki article: http://en.wikipedia.org/wiki/Linear_feedback_shift_register
Do the work, you won't learn if someone shows you how it is done! The palette that the previous post points to are of PRN and other "noise generators" but I suspect that is not what you are after.
Know that creating a PRN with a reasonable number of shift register taps produces very pseudo results, as the "random" pattern begins to repeat pretty quickly, thereby making it not a truly random number.
When you have an attempt that is sort of working and want additional suggestions, post the code here. We won't do your work, we will help you try to do it, and learn it, yourself.
Putnam
Certified LabVIEW Developer
Senior Test Engineer
Currently using LV 6.1-LabVIEW 2012, RT8.5
LabVIEW Champion

How to generate n random dates between 2 time periods

Hi,
I'm trying to write a method that generates n random dates between 2
time periods. For example, lets say I want to generate n random dates
between Jan 1 2003 and Jan 15 2003. I'm not sure how to go about
doing the random date generation. Can someone provide some direction
on how to do this?
The method signature should look like this.
public String[] generateRandomDates(String date1,String date2,int n){
// date1 and date2 come in the format of mmddyyyyhh24miss.
// n is the number of random dates to generate.
return dateArray;
Thanks.
Peter

first take a look at the API concerning a source of randomness (Random might be a good guess), then take a look at stuff concerning dates (Date might be cool, maybe you will find some links from there).
Who wrote this stupid assignment?

Urgent How to generate a random code such as registration code?

I would like to ask that how to generate a random code?
For example, when you register a E-mail account, you need to enter the code for activation. I would like to create a java Bean to do this job. Would you help me?

In fact, I would like to set a 10 digi codes randomly (such as FH654CS081, MKO624VG9f) for user input when they register the forum account. This random code will be sent to the user's email. User have to input this code to a JSP web site. Also, the code which is inputed by user will be matched with the database. If user input success, the forum account will be activated.
By generating this 10 digi codes, I want to handle this generation by using java bean.
1) Any thing else i need to import ? (such as <% page import="java.......?")
2) Any functions can handle this task?
3) Any example can be my reference?
Thank you very much

How to generate a random session variable in php

i want to generate a random session variable and insert the variable in a mysql record to use later to validate an account set up.
person fills out form to create account and submits; inserts form information in mysql record.
i want the random variable to be inserted from a hidden field and the page sends an email with a link to click on to compare the variable to validate the user.
Not sure how to generate a random session variable and get that to the hidden field value to be inserted with the other form information.
thanks for your help,
Jim Balthrop

To insert the key I would personally do something like...
$key = md5($username . $password . $salt);
Insert that into your MySQL database, then send them a email with it, my next code shows how to activate it.
This is to activate the account.
<?php
$key;
$errors = array();
if(isset($_GET['key']){
     $key = $_GET['key'];
     $sql = 'SELECT * FROM users WHERE key = \'' . $key '\' LIMIT 1';
     $result = mysql_query($sql) or die(mysql_error());
     if(mysql_num_rows($result)){
          $sql2 = 'UPDATE users SET active = 1 WHERE key = \'' . $key '\' LIMIT 1';
          $result2 = mysql_query($sql2) or die(mysql_error());
          if($result2){
               //successfully activated account
          else{
               //Something Went Wrong!
     else{
          $errors[] = 'Invaild Key, Please try again!';
else{
     $errors[] = 'Invaild Key, Please try again!';
?>

How can you generate a random number?

Say I have a timer, and I need it to choose a random number between 100 and 1000. How would I do that?
timer.delay(***RANDOM***);Thanks!

I have this, and it's working for me:
int j = rand.nextInt(500);
But I actually want it to generate a random number between 100 and 500, not 0 and 500. How could I do this?
~Dac

How generate a random number that is between 0 and 15! (0-15)

how generate a random number that is between 0 and 15 ??? (0-15)
pls tell me, thx!!!!!!!!!!!!!!!!!

import java.util.Random;
Random r = new Random();
int mynumber = r.nextInt()%16;
For (2^1)-1 number use:
-> int mynumber = r.nextInt()&15; // speedup

I am sampling a signal at 1kHz for every 1 second. How do i average the signal for N seconds?

I am sampling a signal at 1kHz for 1 second. After one second of pause, i sample again for 1 second at 1kHz. If i do this for Nth time, how do i average the signal over the 1 second period?

Anyway you need to have the data to compute the average... and usually you don't get the data point-by-point unless it is very low frequency acquisition.
If it is the case, you have to update your 2D vector point by point and then compute the average after each new point (much slower process indeed). You keep say 20 vectors of data and fill in the data (1, 2...20) and then( 1,2..20), so you compute the average on the last 20 acquisitions
(don't forget the rating)
Doc-Doc
http://www.machinevision.ch
http://visionindustrielle.ch
Please take time to rate this answer

_dynSessConf - How to tweak logic to generate the random number.

Hi,
Can someone please let me know how we can tweak the logic when the random session confirmation number is generated and added as _dynSessConf.
We have a requirement where this random number needs to be a bit longer than the currently generated default value.
Regards,
Saurav

The session confirmation number used for _dynSessConf is already a randomly generated cryptographic number of long type which is hard to guess. Anyways, if you want to further modify it here is one of the approach that I can suggest.
You can probably start with the component /atg/dynamo/servlet/sessiontracking/SessionIdGenerator in the component browser. In its details you will find it has a uniqueIdGenerator property which points to /atg/dynamo/servlet/sessiontracking/UniqueIdGenerator. Following on further it would eventually lead you to the components /atg/dynamo/service/random/SecureRandom and /atg/dynamo/service/random/SecureRandomConfiguration. Look at the service configurations of these components and see if you can get something which you can change or customize to meet your requirements.

How to generate a random number with at least 6 digits?

Hi all,
All is in the question. :-)
I would like to generate a random number but the function "random
number" in Labview isn't accurate enough.
Do you know an algorithm to generate a random number of 6 or more
digit?
Thanks,
PF

Hi PF,
It's simple. Use 2 random number functions in the same process. Now you
should have 2 distinct random numbers that have the same accuracy. Let's say
LV gives accuracy up to the thousandth (0.XXX), now if you divide one number
by 1000 and then add to the other number you should then have something like
0.XXXXXX. Actually, LV random number function can give up to about 17 digits
(decimal). If you are looking for more digits (>17 digits), the idea above
may not work, then the last thing you may want try is to generate two or
three random numbers then convert all these decimal numbers to fractional
strings chop off the 0 and dot then concatinate them together. After all
it's still a random number. How many digits do you want to get? Make sure
the indicators acce
pt that many digits?
Good luck
Louis.
P-F wrote in message
news:[email protected]..
> Hi all,
>
> All is in the question. :-)
>
> I would like to generate a random number but the function "random
> number" in Labview isn't accurate enough.
>
> Do you know an algorithm to generate a random number of 6 or more
> digit?
>
> Thanks,
>
> PF

How do i generate a random letters?

for my end of the year project i need to create a program that is essentially a guessing game... it randomly generates 3 seperate letters, and i have to guess them, how do i do this? the generation part
plz someone help me out, i really need this credit....email me or hotmail me @
[email protected]
thanks so much guys

What I'd do is generate 3 random numbers between 1-26, then corrispond those to letters. ASCII would be the easiest way.
for my end of the year project i need to create a
program that is essentially a guessing game... it
randomly generates 3 seperate letters, and i have to
guess them, how do i do this? the generation part
plz someone help me out, i really need this
credit....email me or hotmail me @
[email protected]
thanks so much guys

How to generate n random dates

Can anyone help me in generating Random dates, i want to generate 100 random dates in yyyy-mm-dd format.

I've tried this, but will appreciate any neat solutions...
public static void main(String arg[]) {
    int no = 0;
    while (no < 100) {
      // Year
      int yylower = 1970; // your lower integer value
      int yyupper = 2000; // the larger one of your two integers
      double rand = Math.random();
      int yyresult = yylower + (int) ( (yyupper - yylower) * rand);
      // Month
      int mmlower = 1; // your lower integer value
      int mmupper = 12; // the larger one of your two integers
      rand = Math.random();
      int mmresult = mmlower + (int) ( (mmupper - mmlower) * rand);
      // Month
      int ddlower = 1; // your lower integer value
      int ddupper = 29; // the larger one of your two integers
      rand = Math.random();
      int ddresult = ddlower + (int) ( (ddupper - ddlower) * rand);
      System.out.println(yyresult + "-" + mmresult + "-" + ddresult);
      no++;
}

How do I generate a random String

Hi, there is probably a very simple answer to this question, but nevertheless....
Is there a class I can use which will allow me to generate a random String of any length?
Many thanks.

depending on which chars you want to use for the String, sometimes it is more handy to use a char[], something like
publc static final char[] CASE_SENSITIVE_ALPHNUM = {'a', ...., 'A',....'1',...};//for alphamumeric case sensitive chars
public static final char[] CASE_INSENSITIVE_ALPH = {"a", ....,'z'};
public String randString(int length, char[] charset) {
StringBuffer sBuf = new StringBuffer();
for (int i = 0; i < length; i++ ) {
sBuf.append(charset[(int)(Math.random() * charset.length)] )
return sBuf.toString();

How to Build a VI that generates a random number between 1 and 80 ....Help!!!!

Build a VI that generates a random number between 1 and 80
Divides the random number by a number specified in the front panel.
If the inputted number is zero, the VI program should turn on a LED in the front-panel to indicate a divide by zero error.
Solved!
Go to Solution.

One quick question Edward, was the answer just in time for your monday morning class.
Ton
Free Code Capture Tool! Version 2.1.3 with comments, web-upload, back-save and snippets!
Nederlandse LabVIEW user groep www.lvug.nl
My LabVIEW Ideas
LabVIEW, programming like it should be!

How to sample a random signal generated by random generator?

Similar Messages

Maybe you are looking for