Drawn 2 data 2 the value axis on the chart of waveform

Similar Questions

• Need for a versatile to pass data to the chart

  Hello

  I have a sub - vi that performs data analyses. I pulled out the results through a def type. I want that this type def to include data necessary to plot the results on a XY Chart.

  My problem is that the data will sometimes contain only 1 and sometimes multiple data series dear. or sometimes the output should be a cluster of two 1 d-tables, sometimes it must be an array of clusters. Is there a good way to do this?

  

  vs

  

  udka wrote:

  You can try using for loop with indexing enabled so you will come to know how much coulumns you have during execution and clusters and then indexing on so that you always have table of clusters.

  You are on the right track.  Just need a little before the loop to transpose the table (to properly make the indexing job) and remove the data from the x-axis.

  

• dispplaying data on the graph of waveform inside/outside while loop

  I create a vi using the random number generator, entering the number in the function(express>>arithmateic>>maths>>trig>>sine) fishing and connect the output of the function sine waveforms. Table of waveform show no problem. If I replace the with graphic waveform table, I get an error that the source type is differenct type of sink. I then put waveform chart outside loop everything hoping that tunnel would act as a table, but still I get the same error. I then put build table palette between all border and loop waveform graph which is placed outside the while loop. I get no error, but no data is displayed on the graph of a waveform. Theoretically, if I press stop I would see a distorted sine wave on the waveform graph, but this doesn't seem to be the case. I am wondering how to view data on the graph of a waveform in such cases!

  Thank you in advance for reading and help!

  See you soon

  First of all, you can take a part of the basis of LabVIEW tutorials.

  Since you need to work with a chart and it is the preferred method to display data point by point, I don't know why you try to use a chart. In any case, you cannot use all simply a table of generation because that would be just the result of the last iteration and your graph indicates it is a single point. If you activate autoindexing, then you get all the values, but not before the end of the loop. If you were to use a shift register and the build dashboard, you might place the graphic inside the loop, but then you would face performance issues that the table would grow uncontrollably.

• Data for the graph economy waveform

  Hello

  I'm trying to collect the data of temperature with the attached VI. Everything works fine until I open the exported file that contains only the last point of the chart. I already had this problem and I think that it is quite common, but I can't find how to solve it.

  Thank you very much for your help!

  Here's what you do.  The central loop is where you get several waveforms.  You want to write each waveform in the output file, which means you want the wave form to write to the worksheet in the Central loop.  Look at its inputs and outputs - put three of them, the file Path/New path, add to the file? and the header? on the shift registers.  Initialize (wants to say wire the register shift outside the While loop) the path of the file to "data\test" (as you've already done), with the new path towards the "output" Shift Register Terminal.  False (the default) of thread to add to the file? and true (if you want headers) to headers?  On the side of the "output" of these two SHIFT registers, wire to 'Add to the file?' "True" and "False" to "Headers?

  For the first time you run the intermediate loop, the file will be opened in a new file (since add to the file? is false) and a possibly written header.  All subsequent calls will add data in the same file (because you wired "True" to add to the file on the output terminal) and no header.

  And to get rid of the unnecessary frame at the end – data flow will be responsible for sequencing.

  Bob Schor

• It is better to define a waveform properties of scale before or after sending new data to the chart?

  Hi, I wonder what is the best time to update the properties of the graphic scale waveform.

  I'm sampling data every 15 minutes for 192 samples, or 48 hours.  I want to draw these samples with x in absolute scale so the scale maximum x is time and x minimum scale at the time mode is x max in less than 48 hours (172800 seconds).  I want also to intermediate-scale markers 6 hours apart and to be multiples of 6 hours.  for example at 06:00, 12:00, 18:00.  It works by using nodes of property but sometimes intermediate markers are on the hour 6 multiple and sometimes they are at 6 hours after the scale min marker.  for example, 09:15, 15:15, 21:15.  Is there a way to ensure that the intermediate markers are on the hour 6 multiples?

  Thank you

  Neville

  Neville,

  I don't think there is a function of the order of execution by using nodes of property information across your graph. If you are concerned about the speed of your VI, I would recommend writing to the property node before update you the chart. I believe that this will ensure that the chart will update only once: when the new data is sent to the curve, as opposed to the update with the new data, then with the new scale.

• Save the data in the chart to the file constantly

  I'm analog data Aqcuerir of USB 6000 data acquisition and display on the chart. I have to save all the data in a file as well (text or excel... or at least a file). It is easy to configure so that the data is saved after the stop button was so press until the end of the race. However, I need to write to a file when running because he could be running for days. In such a period extended, the buffer is an overload, and the data is lost.

  Could you please indicate some kind of how to write data to a file constantly during measurement, wthout record in the buffer?

  
  

• Constantly add data to the chart 2D

  Hi I'm going to be very difficult to deal with some great paintings. What I'm trying to do is create a program that monitors the 23 entries of a controller for cRIO. Here is the flow of the program:

  1. the program starts and collects 1 sample per second of each entry and place into a 2D array, which has 23 columns and 10 rows

  2 only collect 10 samples, constantly replace the samples in this array.

  3. once a threshold is crossed any of the entries take the previous table and add it to a different 2D array that contains 360 000 rows and 23 columns.

  4. once the table is inserted permanently add data of each entry in the new table at 100 samples/s.

  5. the big Board has 360 000 lines because the program must be able to record data for one hour if necessary.

  I used 23 separate tables and it worked OK but it was much to ineffective and the program was slow. I can't get data to enter in the right table and I'm pretty frustrated so any help will be much appreciated. Thank you

  Adam

  At least I'd be initialize your berries to the largest possible size that you may encounter. When adding data use the subset of table replace to update the table with your new data. In addition, I would put these paintings in a shift register. Avoid to display an indicator of control to data, do not use local variables or property nodes to access the data. or the other.

  Also, do you need to have all the data in the application while it is running? You can use medium running or other methods to reduce the amount of data, you should keep in mind? May store data to disk and keep only part of it in memory and read only comprehensive data when you need it?

• How to remove header, time and date of the Subvi "export waveforms to the spreadsheet file?

  I use 'Export waveforms for spreadsheet File.vi' in order to export the labview data into a file.

  However, the default format is the following:

  waveform [0]
  T0 13/11/2009 14:54:34
  Delta t 0.001000

  time Y [0]
  2009-11-13 14:54:34 - 2.441406E - 3
  2009-11-13 14:54:34 - 2.441406E - 3
  2009-11-13 14:54:34 0.000000E 0

  Yet I am interested in only the actual data without header or stamp date and time, for example:

  -2.441406E - 3

  -2.441406E - 3

  0.000000E + 0

  Could someone help me please with the adaptation of the Subvi to my needs?

  Transposes set to true.

• HSlider as the range of dates in the charts

  IM using hslider as a date range to view database
  on the dates selected for the chart.
  My problem is how to change the chart data, based on the selection of the date of the hslider
  Note: there are 3 sets of line in the table, so the data set should be based on the range of the hslider date selection
  
  Any idea! Examples

  found a use for good double cursor if you try to do something like google, thank you cards to brendan, good job.
  http://www.stretchmedia.ca/code_examples/chart_range_selection/main.html

• How to sort the data in the chart

  Hi, the data feeds that I show on my chart are a kind of account for each of their life cycle. For example, we have 20 in lifecycle = Production, 15 to life = pre direct cycle, 15 = testing life cycle, so on. I want to be able to sort the data by the nature of the life cycel, so in this case, the test-> advance live-> production rather than alphabetically. How to do this?

  Put a 2nd column in your report by using the field of life cycle and then write a CASE statement WHEN:

  CASE {cycle} during the 'Test' THEN 1
  WHEN 'pre Live' THEN 2
  and so on...
  ELSE 0 END

  Hide this column and use it as the sort order.

  see you soon
  Alex

• data in the chart values

  Hello
  
  How to display the values of stacked - Vertical data - model rtf?
  
  Thank you

  http://winrichman.blogspot.com/2010/05/chart-data-values.html

  Re: Option to display data in charts
  Re: Need help - advanced graphic coding

• problems with the date in the chart in the first instance

  Hello

  I have a date selection field (P2_START_DT), which has a default value in a table

  Here's the code I used to set the default (thanks again to the expert for assistance)

  Start

  Select max (REC_DATE) dt in: P2_START_DT

  from TABLE_A;

  return: P2_START_DT;

  end;

  on the same page, I have a report (Type: SQL query) and a chart that takes P2_DATE as a parameter

  This is a sample report SQL condition

  ...

  where

  RECORD_DATE >: P2_START_DT

  This is a condition of samlpe SQL used for the graphics

  ...

  where

  RECORD_DATE >: P2_START_DT

  condition is about the same for both

  My problem is that when the page is loaded for the first time, the P2_DATE field and the report shows good data but my chart shows nothing.

  to test, I added a button to submit the page.

  When I click on the button both my chart and the report shows the right data... suggesting that for some reason any graph is not picking up the default value for P2_START_DT when the page is first loaded

  Please notify.

  The default value for your item is not saved in session state until you offer page.  When your chart is rendered the first time the value of your object in session state (which makes graphic references) is not defined.

  Create a calculation for your section header to set the value of the element in the session before the rendering of the graphics state.

  Calculate the point: P2_START_DT

  Calculation Point: before header

  Type of calculation: (single return value) SQL query

  Calculation:

  select max(REC_DATE) dt
  from TABLE_A;
  

  Condition Type: point value / Expression 1 a NULL column

  Expression 1: P2_START_DT

• tracing of dynamic data but the diagrams showing the previous acquired data too

  Hi, I'm developing a curve of voltage signal at the same time as it is acquired by the computer of the amplifier to locking SR830. I used a XY trace and placed inside the loop, where the data are acquired.

  Please find the attached VI.

  Cory K wrote:

  Altenbach says:

  The express VI 'built the xy graph' has an entry "reset?" Wire a real in order to reset the internal data. In your particular case, do a '= 0' on the final iteration of the Interior for the loop and thread it reset entry.

  Now I'm confused. He does not want to keep the previous data or not?
  He made it seem like it's getting only 1 point in the chart, but he wants to keep all the data in the chart

  Sorry, my post was incomplete. You must double-click the express VI 'build xy graph' and uncheck'erase data on each call.  Easy enough?

  

  Whenever you want to start over, thread a real for the reset entry to clear the history.

• SeriesInterpolate - delete data in the table early

  Hi all

  I did experiment with the graphics available in Flash Builder 4 and I like the capabilities of the cards, but have run into an area that didn't work quite as I expected. Specifically, when adding and deleting of data point to a table with SeriesInterpolate defined.

  I've set up three examples, I guess these will do much more reasonable that I try to explain it in words only! :

       - http://sprymedia.co.UK/media/Misc/Flex/LineChart/LineChart-Add.swf

  -By clicking on the button at the top right adds a new point of data at the end of the data table, and the table is correctly updated (almost smooth there is a change of 1px at animation which is strange...)

       - http://sprymedia.co.UK/media/Misc/Flex/LineChart/LineChart-delete.swf

  -By clicking on the button (which is now incorrectly labeled) removes the element at the beginning of the table data - but the chart draws it as if he was removing the end element.

       - http://sprymedia.co.UK/media/Misc/Flex/LineChart/LineChart-AddDelete.swf

  -C' is what I'm aiming eventually for - a smooth side scroll graphic, when new data are added at the end and the old data are dimmed on the front. However, the delete behavior makes this look a little weird.

  Is there a way to get a smooth transition I am looking with SeriesInterpolate? Or she and be implemented in a different way?

  Thank you very much

  Allan

  Hi Allan,

  Yes. Set of cards code is part of open source for Flex 4. Latest version of the SDK can be downloaded from http://opensource.adobe.com/wiki/display/flexsdk/Download+Flex+4

  Thank you

  Deeptika

• How convert the waveform on the table of waveform waving on waveform graph

  Please answer now...

  Your other post indicates it is a thesis, I consider homework. What did you do? What do you mean? What do you get a waveform graph? You have one, or the plots of 10? If you have a parcel, what you get as the data type for the data in the chart? If you have more than one conspiracy, what do you get? What is the data type that accepts a waveform graph? Have you looked to see how that is defined?

  For example, let's say you have a parcel on your chart. When you get the data, you get... a table 1 d of values. It's kind of logic, right? Well, what is the type of waveform data? It consists of a starting point, time delta between points and an array of values. Hmmmm... So, what about using the wave function of build? Just a thought...