Average simple from a 2D array?

Similar Questions

• How to calculate the average of the 1 d array?

  Could someone please help me, how can I calculate average of the 1 d array? For example, if the table 1 d - is [2, 3], I would get average = 2.5. Thank you very much!

  Use the average function. You can use the search or the quick menu to look for where you don't know where to find.

  Norbert

• How can I delete items from a 2D array?

  Hi all!

  I asked a similar question in the past, but I'm looking at a slightly different scenario now. I have a chart 2D of 8-bit values which form a video image, but I'm trying to remove a number of the highest values in the image. In order to avoid the image of being horribly ejected, I thought that I would like to replace these with NaN values. While I thought it would be simple, I had problems to access the items in the middle of a 2D array. I have attached my code, but I fear it will not be that useful, it was something of a poor attempt (but this is my most complete).

  Thank you for your time ,.

  -Gobble

  First of all, eight bits (U8) have not NaN. Are you using the correct representation?

  You can substitute a zero (for example) instead.

  Here are two simple using tables DBL ways, because that's what you actually have. Modify if needed.

• Average data from multiple text files

  I am new to labVIEW so any help is appreciated:

  I have a 100 txt files with two columns (separate tab) for a value of X and Y.

  I need the average of the values of Y to generate a single file and generate X against Y graph.

  So, how to read the data of these text files? (without having to select each one individually) and the average data and create a chart XY him?

  Thanks in advance

  There is a function to list folder in the palette of the file i/o that will return an array of file names.  Feed this table in a loop to open and read each file in turn.  Put in a new file, build a table with her, process the data or do whatever you want.

• How to change an element from a 2D array?

  I have searched the forums for something similar, but couldn't find anything. My apologies if this seems trivial, but I'm not a specialist of LabVIEW and my project includes a large number of disciplines so sometimes when I'm working on LabVIEW related tasks now and then I need a refresher.

  Basically, I am changing - replaces not - one element in a 2D array. Thus, for example, if I have the 2D table:

  A

  1 2 3 4

  B

  1 2 3 4

  C

  1 2 3 4

  I'm dividing element 3 of 1000.

  I suspect that, like so many LabVIEW, it would be very easy for someone who already knows how do...

  Index of the item that you want to modify (using the table to index), make the change, right hand index to help replace array element.

  If you are concerned about performance, use the element in place.

  http://www.NI.com/white-paper/6211/en/

• How to average 26 samples in an array of 219 items?

  Hello to everyone,

  Well the problem I have is that I have a table of 219 items and each 26 I want to take an average. Please can anyone suggest a solution for this?

  Hi gstathatos,

  Here's a suggestion:

  

• Average values of several 2D arrays

  Hello

  I'm trying to understand how we go on the average of the values of a number N of 2D paintings, as in all values of [1,1] average ect, then [1,2], result in a final 2D table of averaged values. All the 2D tables will be the same size.

  Here is a method of a loop. Add pages and divide by the number of pages.

  Lynn

• How to draw the average sensor values against an array of constant (long positions)?

  I have 7 microphones where I take the RMS value.  They are physically located in a line, and I would like to draw their values against their positions.  How can I think.  I guess I'll need to use the XY plot, but I don't know how to turn the 7 signals into a single table and how to create a table of constants for the positions.

  I think that I have, there are however a large number of conversions.  You see somehow I could simplify this, or is it as simple as I'm going to?  I have included my file to the post.

• Average VI simple mobile

  Just created a VI of average simple mobile. See the code attached (LV2012).

  It seems to work - any comments or improvements?

  Thank you

  Rambeau

  
  

• Match entries in an array to another array and create a new table.

  I tried for a while to do what should be a simple operation.  I have some of my code work exectpt for this part, which is similar to the post below.

  http://forums.NI.com/T5/LabVIEW/pulling-out-values-from-a-1d-array-based-on-look-up-table/m-p/404524

  However I try to match the first two columns in table 1 to those in table 2 and create table 3.

  

  Please can someone help?  I'm in a time crunch.  Thanks in advance.

  Same idea, another implementation using variants to perform the search.

  

• How to save the text file input array

  Hello, I am very new to LabVIEW, so apologies if I use the wrong terminology.

  I did a VI which reads 25 text files from a 3D array.  When I click on run I need to select the files 25 text.  Is there a way I can save the data imported for later calculations without having to select the files each time?

  Here's what I have:

  

  Dan_Owen101 wrote:

  Thanks for that.  But the user will not have access to these files during execution of the VI.  There are many other paintings that I'll need to save and index for other variables as well, so just for that would use the method of you would be useful to know.  All I really need is a way to save these relatively few values in a table.

  So do you intend to have these values hard-coded into your executable?  This seems dangerous and likely to have you to make updates much.  Believe me when I say you want to have the sitting files with the executable.

  But if you're insistent on this, I would use a global variable.  Have a VI just read all files and build the table for you and write in the global variable.  Then you can right-click on the control on the Panel before global variable 'Create default value'.  Save the variable and build your executable file.

• error when pass array 1 d by data in table pointer via Labview-built c++ dll

  I'm trying to generate a Labview VI to a DLL and let it be invoked by vc ++, by which a 1 d array is passed. However, I can't generate the DLL when you use the data pointer to the table, which gives the error like below:

  [ERROR]
  Code :-2147221480
  Strengthening of the DLL.
  Error when compiling the DLL as a function name or a parameter is illegal. Check function and parameter names are legal C identifiers and are not inconsistent with the LabVIEW headers.
  Additional information: 9 project link errors
  Type Library generate error. MIDL.exe failed during the compilation of the odl file used to create the type library.
  Note: The error indicates that the odl file has unknown types. This error is possible when
  works with non-standard types is exported using the method qualifier exporting files in
  release the configuration that have not been recompiled during the build process.

  The Prototype of VI define is as below

  

  But, if I use the pointer to manage through the table, the generation is successful, error-free. I write something to call the DLL built labview, which basically reads 1000 double the data of an instrument.

  #include "TestDQMaxDLL.h"
  #include 
  
  using namespace std;
  
  int main(int argc, char** argv) {
      cout << "Start testing DQMax DLL" << endl;
  
      int leng{ 1000 };
      DoubleArray rawDPData = AllocateDoubleArray(leng);
      test_dqmax_dll(&rawDPData);
      cout << "Successfully invoked the DLL!" << endl;
      cout << "DoubleArray.len: " << (*rawDPData)->dimSize << endl;
      for (int i = 0; i < leng; i++)
      {
          cout << (*(rawDPData + i))->elt[0] << "\t";
          if (0 == i % 10)
          cout << endl;
      }
  
      system("pause");
  
      DeAllocateDoubleArray(&rawDPData);
  }
  

  But the printed results are not correct.

  My questions are:

  1. why cannot generate DLLS with the data of table pointer. In this case, the argument of the function is as simple as a double array.

  2. for table handle pointer, when the resutls are incorrect and how to get the good ones.

  Any comments would be appreciated.

  BTW: I use Labview 2012 with Visual c ++ 2013 on Windows7 64 bit.

  I never needed to pass a table of LabVIEW handle external code. Search this forum for posts of RolfK, it is most likely to have posted such an example. I recommend that you keep things simple and remodelling your table a table 1 d 2D before moving on to external code and manage as a 1 d table (it's just a little extra math).

  Sorry I don't have a solution on why you can't build with a 1 d as a pointer of table table. If you post your project I'm happy to try to build (I'm on LabVIEW 2012, however), but as you said, it will rely on another machine, it seems more likely to be a problem with something on the specific computer where there is a problem.

• sort a 2-D array element

  Hi guys, how to sort an element from a 2D array. For example, I would like to know the value of the element in array [0] [1].

  The array index function would be a good start.

  Have you even tried?

• calculation of the average value of the sorted data and polar route drawing

  Hello

  I did a VI that calculates the average value of the wind rotor/speed-ratio in the sections of 30 degrees (wind direction). He also called the polar plot of calculated data. Everything works, but I would like to make more detailed calculations and drawings, by increasing the resolution to 1 degree, or...

  Problem is VI, I did, is not easy on a large scale. At the moment, I have 12 parallel structures of switch-box to calculate the average value and build the array function to collect data calculated for Polar plot to draw the image in real time. I know it's probably the worst way to do it, but since I have done a few things with LV, it was the only way I managed to do what I wanted.

  Now, if I continue in same way to reach my goal, I have to create 360 Parallels switch-case structures... that are crazy.

  Something like the calculation of the average of the table or matrix (zero/empty values should not be calculated on average) inside the loop or similar way would probably be the best solution.

  So, polar plot drawing is not a problem, but creating a reasonalbe average metering system is. Any ideas?

  I would also like to rotare northward to the top (0 deg), and degrees of increase in a clockwise direction on polar ground dial plate (as on the compass).

  VI on the attachment. (simplified version of the complete system)

  I have signals:

  -Wind speed

  -wind direction

  -Rotor speed

  I want to:

  -calculate the average value of the speed of the wind / rotor - ratio in sections (5 degrees, 1 degree)

  -Draw a polar path of the wind rotor/speed-ratio of averages in propotion of wind direction

  I'm using LabView 2009

  Thank you very much.

  It is closer to what you're looking for?

• creating a table/average question

  I'm new to labview and I have problems to understand how to create a table.

  I use an Arduino Uno as my DAQ and when I take an anolog measure I've seen a lot of fuctuation to my measure. I know with arduino, you can perform with an average simple by using the function "Get a finished sample of Analog", but I know that I not be using an Arduino in the long term and trying to figure out the right way to do it.

  When I have on average with the Arduino IDE I usually code that looks like this:

  float analogsum = 0;

  for (int i = 0; i)< 10;="">

  analogSum += analogRead (analogPin); where analogRead converts the analog value to a value\ digital 10-bit

  }

  average = analogSum/10;

  I am trying to create this same feature in LabView. The only way I can imagine the analog value of each iteration, in summary would be to store each value in a table, then add them together and divide by the number of iterations in my loop for.

  How would I do this in Labview?

  Hi awwende,

  show all 3 suggestions above:

  

  You really should go LabVIEW101 the ni.com site to learn the fundamentals of LabVIEW!