arrays in loops for

Similar Questions

• How to select the first item in an array in a loop FOR

  Hello.

  I use Labview 8.5

  In my application, I have a loop 'for' where I read some values from a device. (strings and digital)

  As you know Labview 'stores' values up to what the loop 'for' is completed, and then they come out in a table.

  Ok.

  I want to just use the first element for strings and digital and then do something with it, like to compare (for digital)

  For strings, I used successfully 'Split 1 D Array' and choose 'everything first subarray'. Good.

  Now for digital that works too, but the result is an element, array type too. I need to be digital (decimal) is not no table type, because I need to compare (greater than 0). Then use a case...

  So, table of an element in a digital decimal? Or the table at the first decimal element. How?

  I tried also with the subset of the table. Even think. Labview won't let me compare a table 1 d with 0. It makes sense, but how to convert, to have the first decimal element?

  Try to use the 'Index Array' function. If you do not connect to the terminal of the index value, it will return the first elelemnt in the table. If wire you an index, it will return the value specified.

  Ben

• Automatic indexation 2D array in the loop For - what is happening?

  I found many sources dealing 1 d tables in a loop For or a While loop, using automatic indexing, but nothing on the tables of higher order.

  I work with a program that feeds a 2D array in a loop (see table).  From what I see, it looks like this the results of automatic indexing in a 1 d, the first column of table 2-D table.

  This is the expected behavior, and it would hold true for arrays of higher order, table 3D for example?

  Is it possible to refer to the second column rather than the first?

  wildcatherder wrote:

  I found many sources dealing 1 d tables in a loop For or a While loop, using automatic indexing, but nothing on the tables of higher order.

  I work with a program that feeds a 2D array in a loop (see table).  From what I see, it looks like this the results of automatic indexing in a 1 d, the first column of table 2-D table.

  N ° it auto-index through a line at a time table.  You will get a 1 d table which consists of all of the columns that make up each row in each iteration.

  This is the expected behavior, and it would hold true for arrays of higher order, table 3D for example?

  Yes.  Automatic indexing on a 3D Board will give you a table on each iteration of each page 2D.

  Is it possible to refer to the second column rather than the first?  This question applies once you understand the first response.

• Iterate over all others (or number) of element in an array using a loop for

  I'm going through a table, but instead of autoindexing I want to ignore all the other elements or perhaps a number of elements that will be specified for the user.

  The basic features I want to reach are the next in C code.

  int temp_var = 10;

  int i = 0;

  for (i = 0; i<=1000; i="">

  {

  }

  I am very new to LabVIEW and I didn't know how to use internal variables.

  Can this be achieved using the registers at offset?

  I enclose the code that I currently have to do this. Let me know what you think.

  Thank you guys.

  You must implement this one a While loop with a shift register to hold the index.  The index must be changed by the step size.  Here is the code:

  

  I asked for a new style of loop For which would specify start, stop and the conditions of the stage, but it seems that a lot of people is just not this idea.  Don't know why?

  See here.

• Create a table in a loop 'for' (reset the number of loops)

  Hello

  I try to incorporate a signal of acceleration from an analog input CRIO to get speed and then further integrate to get the moving of a vibration system.

  I understand that to achieve integration, a table must be fed in. My problem is that I could not buffer the signal in a buffer block, as I couldn't find buffer blocks. so I decided to create my data table by using a loop "for". The nests of the loop 'for' inside a timed loop. The problem that I'm stuck on is how to reset the loop 'for' in order to fill the buffer with each iteration of the outer loop timed.

  I enclose the code if that helps. Note that I use labview in 2013.

  If anyone who has encountered a similar problem before can help me, I would be gratefull.

  Concerning

  Ali

  You can use a shift register initialized as inputs to your curls, to build your table of one. However, you realize, don't you, that the execution of your program as written loops as soon as the computer can spit out responses, then the output array may contain several points that took place before the entry has updated? Assuming that your thing cRIO (I've not worked with these) has integrated into its routine acquisition of calendar data, I suggest you put that inside the loop to get a data point by reading.

  And do you really want your graph to distance for update only every thousand points (points of acceleration million) speed?

  Cameron

• make a graph in real time of 1 DBL value at a time, using a loop for

  I have a somewhat interesting programming task where I have the following situation: (I have attached a mac version of vi Labview 2013)

  -Using a patented (pre-made and uneditable) sub - vi, who receives a value of 0 or 1 as input and reads off a single measure, whenever he receives 1 while a value of 0 is necessary to 'reset' of the vi to rehearse a new measure.

  -I would like to run this sub - vi repeatedly in a loop For each value of "measure" are sent to a curve of waveform to give a direct value (real time) for the graphic to display.

  -As it is, I have a vi file that simulates action in a loop but built in a 1 d array to get exuent values sent a waveform curve.

  -I don't know how to make a real-time graph which receives 1 value double both.

  -In addition, I want only every 2nd value sent to the loop for, but I already have several ideas on how to do it.  First of all, I am concerned about the target in real time.

  Kyle Shiel

  A graphic, not a graphic, allows you to update a point at a time. It would be inside the loop for. update the chart or not, you can use a select statement or the structure of the case.

  These are pretty basic functions in LabVIEW. Please see the free tutorials.

• Facing problem in the recording of data without overlapping in loop for

  Hello

  I am facing problem in writing data withou overlap if I run the outer loop for the 2 times or more, and inside the loop, I make table in a way that I want to, but when I try to compile this table with record temperature I am not able to do. Please guide me through ths.

  Thank you

  Hnagpal

  Himanshu salvation,

  To start reading your matrix of the second line, you can use a table of Index function once you have loaded the table of your spreadsheet file. The function Array Index lie in the range of functions under functions > programming > Board Index. The help of LabView is very useful to explain how to use this function.

  With regard to the accuracy of the numbers when read you the spreadsheet file that you read is formatted in fractional chain, since form you it converted into a mixed string before saving. In order to recover all the precision, read the worksheet as a string and then convert it to a string using a string Fract/Exp to fractional numbers conversion function. This feature is on the range of functions for String > String/Number Conversion > Fract/Exp string in number. The help of LabView is also very useful for explaining the operation of this function.

  Best,

  Dan Nelson

  Technical sales engineer

• 2D Array output confusion - arrays and loops

  Hello

  I am writing a program for a measure 3-terminal of a FET.

  I use 2 power supplies: for every increase of grid voltage Vg, I'm doing a drain voltage Vd Sweep and save the Id and Vd.

  The attached code, you'll see a Subvi, called "I.V. 2 terminals", which returns a table of voltage Drain (1 d) and a table current Drain (1 d).

  But because the output of the Subvi is in a loop (For increment Vg), the end result is a 2D array.

  Whenever a table is leaving a loop it acquires a dimension.

  So ultimately I don't know what are the clues. How can I prevent the table to have a dimension of their out of the loop For?

  I would like to see the output of the Subvi to go straight out of the loop, intact.

  I have attached the Subvi as well, but I don't think that you will need.

  Thank you! I'm still very new to LabVIEW and I really appreciate your help.

  Nicolas

  You can disable autoindexing on any tunnel by clicking right, with evidence that cause you only get data from the last iteration. Is what you want?

• Table of path error 1430 in the loop for

  Hello!

  I have a problem with the 1430 error: path is empty or relative, which seems impossible. The thing is that I have a battery of indicators of path connected to the loop for (check the .jpg and there is no problem with writing to a file by using the paths of an array with the first and last index.) Others are not saved because of the error... to be honest, that all data paths are absolute. Record in the file of the idicator path is the work of a Subvi (merge data vi) but it is in a for loop because I need to make it available to multiple files. There is no error that occur with the work of Subvi to a path. The question is: what labview makes with the paths saved in a table between the loops? I have just run out of ideas so if someone had some time, I would really appreciate for all the tips and ideas.

  K.

  Hello again,

  If someone was interested in the happy ending: the solution is: 2 loops for. I think there must be something with the way that labview sends data between iterations. In any case - don't know how much exactly but works

  the floor is .jpg.

• Control reference 1055 error when you use a loop for

  Hello

  I'm having a problem using control references to accomplish the following: I a VI that reads data from a text file, and then uses that automatically update the value of a control on front panel on two live different, then set the default values, and then save them. Comes from the array of control references, I tried looping on text labels until I have find the one corresponding to the order, I want to change and then update its value. The problem I have is that if I use a loop for, then 9times of LabVIEW 10 complains error 1055: "LabVIEW: object reference is not valid. If instead I the wiring to the index table and manually extract the reference, then it works every time and for each index of the reference of the order.

  Can someone take a look at my code and just see if its obvious what the problem is? In this case, I have a simple solution, but I would really like to understand what I did wrong. I have included as a code snippet, but also attached the files if that helps (Its Import_Colormap.vi, which is the problem). Persons with disabilities code fails, the active code works but I can't see what is really the difference between them - I can change the index of array 0,1,2, 3. and no mistake.

  Thank you.

  

  Your "Colormap.ctl" is a strict type def that contains a ring.  You define the elements programmatically, make the default values, and then save the "Colormap.ctl"?   I was never practicing this but here is a thread that covers this in detail. I do not understand what you expect reach by running.
  The next thing: at the same time (at the same time!), you open the Colormap.vi (this is what we see in yout PNG) that contains an instance of the Colormap.ctl on the front panel. I'm not pretty sure if LabVIEW can handle this correctly. This could be the reason why you sometimes get the error 1105.
  I prefer StringsAndValues and eventually the value of the ring running.  There is no need to do it with a def of strict type.

• How to stop a loop "for".

  Hello

  Do you know how I can stop a loop for? because when I click on the stop switch on my front, the VI didn't stop and continue to perform the loop.

  If you have a newer version of LabVIEW, you can right click on your loop For and show the terminal stop.  This will allow you to stop the execution of the loop For the earlier that you would otherwise based on the N or the number of items in an array of automatic indexation.

• Help with the efficiency of the program, stop a loop for?

  Hi all

  I need some advice programming General to help my VI to operate more effectively.  I have a table in which the program runs each point and 2d compares the value for the surrounding points.  The user can select the range of cells to inspect range, so if the user selects 1, then, it will compare the point (0,0) to all cells in a single cell.  If the user selects 2, then all the cells in a range of cells 2 and so on.  If the point (0,0) is superior to everything around him, then he writes this point in a table.

  I made more notes in the VI to explain what is happening, but I think that the program would be more effective if I could stop a for loop to run as soon as it detects a false condition, i.e. the point (0,0) is not more than one of the surrounding points.  As it is right now, it compares at all points around him, writing TRUE/FALSE for a table, then checks if all conditions are TRUE.  That takes a lot of time if the user selects a value of 8, for example.  It would reduce a lot of processing time if he just threw to the next point as soon as it finds a FALSE condition.

  Any other advice would be appreciated as well.  Try to be a more effective programmer!

  Thank you!
  Alex

  I do not attach the data file, because it is too big.

  In versions before the invention of the loop For with conditional stay terminal, you can do it, but you have over what a while loop to stop when your condition is True, OR when the terminal i is equal to the size of the incoming array - 1.

• loop for and while loop with empty table entry

  Hello

  I have a question with loop and loop.

  When a constant empty array (zero element) is connected to the loop For with "allowing the index", there are no interactions performed in loop For. But, if the loop is replaced by any loop, no problem.

  LabVIEW 2010

  Hello

  It is ok. I have no problem at all.

  For the 'loop' For when you connect the table thanks to indexing, the number of iterations is set to the size of the array. The iteration number assigned to N (in your case 10) is ignored.

  For the 'While' loop the number of iteration is defined by the Boolean Condition and the size of the array is ignored.

  Paul

• How can I autoindex looping for to create several channels daqmx

  I'm trying to autoindex create a loop FOR containing the DAQmx vi to create AI multi-channel voltage with identical settings, except that I need to apply specific channel names using a constant and specific physical channels using a constant of channel. Wiring of a constant DAQmx of physical channel does not work because the data type is incorrect. Similarly, I don't understand how to use a string constant to autoindex through the channel names is or how to configure the constant string (s) to assign names. Also, when I try to make one of these, I get a tunnel to exit the DAQmx autoindex create channel, rather than a task out. I can achieve my goal using several explicit DAQmx create calls to channel, but for high channel count, it is very time consuming.

  I use LV 8.5.

  I'm hoping to find the code showing how to perform the conversion type, flattening, or what to do.

  Diane has.

  I have an array of clusters.  Each element of this array is a cluster.  The cluster consists of a (scalar) string and input/output (also scalar).

  In addition, my TI attachment extracted.  I think that your file has been LV2009.  If so, you can drag the image from the browser and drop it onto a diagram.

• Interface user-generated loop for?

  var compLayerArray = new Array("Compsition 1", "Composition 2", "Composition 3");
  var layerControls = newArray();
  
  
  function generateWindow(){
  var layerPositionsWindow = new Window("palette", "Layer Positions", undefined);
  var layerPositionsGroup = layerPositionsWindow.add("panel", undefined, "layerPositionsGroup");
  layerPositionsGroup.orientation = "column";
  
  for(var p = 0; p < compLayerArray.length; p++){
          layerPositionsGroup.add("statictext", undefined, (p+1) + ". " + " " + compLayerArray[p].name);
          layerControls.push(groupOne.add("edittext", undefined, "0"));
  }
  
  var layerPositionsButtonGroup = layerPositionsWindow.add("group", undefined, "layerPositionsButtonGroup");
  layerPositionsButtonGroup.orientation = "row";
  var positionCancel = layerPositionsButtonGroup.add("button", undefined, "Cancel");
  var positionSave = layerPositionsButtonGroup.add("button", undefined, "Save");
  
  layerPositionsWindow.show();
  
  

  I was wondering if it is possible, and if so, how, for generating a user interface based on a loop for? I try to view each layer within a model in the user interface. I can do, because a static text does not require any kind of var. However, when I get to the line 11, I don't really know how I would go about adding a text edit under the name of each layer. I want store a value for each layer. Thank you!

  -Nate

  OK, I see what is happening. You have decided to add an additional group to the user interface within the same main layerPositionGroup. What happens in the loop to the #14 line. Actually, this has changed now the user interface model that was easy to read before to something more complicated to read. So since you have now "group #" then "GroupTwo #" you now generate a user interface with this model...

  Group 1 (statictext)

  GroupTwo 1 (statictext, edittext)

  Group 2 (statictext)

  GroupTwo 2 (statictext, edittext)

  Group 3 (statictext)

  GroupTwo 3 (statictext, edittext)

  .. compare to the original provision of...

  GroupTwo 1 (statictext, edittext)

  GroupTwo 2 (statictext, edittext)

  GroupTwo 3 (statictext, edittext)

  So when you browse the children in the group in the debug.onClick in the #34 line, you do not get anything because 'Group 1 (statictext)' doesn't have a second child, just one, the statictext. This interrupts the process. Not sure why it isn't throwing the error, but it is the cause of your problem.

  Group 1 (statictext) //Has 1 child

  GroupTwo 1 (statictext, edittext) //Has 2 children

  Group 2 (statictext) //Has 1 child

  GroupTwo 2 (statictext, edittext) //Has 2 children

  Group 3 (statictext) //Has 1 child

  Children //Has 2 GroupTwo 3 (statictext, edittext)

  Through this model is very different, because now, you must take account that you want to only read that the odd numbered children clues, those two children. So your onClick for loop must now include a check for odd numbers like that...

  debug.onClick = function(){
       var kids = globalVar.children;
       var kidLen = kids.length;
       var kidValues = new Array();
       for(var k=0; k