(Multi ^ n) draw graphs of waveform

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• How to write graph of waveform data to text file with the option to the user to do

  So, I'm new to labview and will have bad to write a program in particular.  I have a waveform graph that runs for 120 seconds, generating a sine curve.  I am, however, having a time difficult get the program to write the x and are coordinated in a text file.  I've attached what I have so far.

  The first task I was assigned was to write a program that creates a curve of snusoidal on the front panel by adding a data point every half second for 120 seconds.  The plot should starts only if the user presses a button to start.

  The next part is to give the user an option to write the data generated in a file of worksheet called 'sine.txt '.  The file name and location should be hard-coded.  The file must contain the x and there contact information of each data point in columns separated by tabs, also known as the delimited.

  I spent several hours refining the attached program, and I can't seem to make it work right.  Any suggestions would be helpful at this stage.

  Sincerely,

  A student of chemistry frustrated whose research mentor is out of town

  First, you create files Excel.  You create text files.  And it seems that your writing on a file already created X (time) vs Y (curve of data) that is delimited by tabs.

  All you do is simply too complicated or a Rube Goldberg.

  All you need is the joint.

• Put multiple graphs of waveforms in a report

  I am a new user of LabView and I am trying to select more then a graph of a waveform with a control or a list to my report of Word, but I couldn't find a way to do it. I can choose ONE of many graphics, but sometimes I need to send two or three.

  My .vi sending so that you guys understand my problem.

  Right click on the table of Boolean block diagram > change in control. You now have a table on your control panel, resize to the size you need. Then, you can double-click on the empty space of front panel to create a label for it. I don't think you can change the actual label on the table without any labels, so I just made an additional label on the side of it.

  

• How can I view graph of waveform in a secondary Vi model.

  Hi all

  I am new to Labview so need help. I am developing an application that reads data from a network of sensors (WSN) wireless. The WSN composed of connected to the USB base station what data gets other nodes of sensors.  The data comes in a certain format.  Name of the node, temperature and humidity reading etc. I want to read data from the serial port, and based on the node name, I want to view information for each node in the separate window s or secondary etc. So if a new node is detected then a new window is created for this node. Given that all nodes have the same sensors on board I only need a model one. I can read the data by using the serial port, analyze the data to detect which node it is and also what are the sensor readings. I created a template of VI for the sensor node. I have problems showing model screw in a secondary school. I can correctly display a waveform graph in high school, but I have problems in a waveform graph display in the secondary. I can see the actual waveform table in high school, but I do not see the plot. Would be grateful if someone could tell what I'm doing wrong here.

  Thank you very much

  Raza

  Hi all

  I think I solved the problem. It seems that I was running the Vi in a loop. I took the Vi run outside the time lopp and it works very well. Also, I need to close the reference at the end.

  Raza

• 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.

• How to add a cursor to a graph of waveform on mouse click

  Hi, I have a waveform graph, which is displaying the data. I wish I could click on a point on this graph during execution and add a cursor to this place. Any suggestions? I tried to understand this for awhile but I'm completely stuck. Thank you, Ty

  Here is a version 8.0

• Registers at offset and graph of waveform for function tare - strain readings

  Hello users,.

  My goal is to put a strain given to zero when the strain has an initial reading. I guess that it will provide records shift in combination with the structure of the case. I tried to use two waveform graphs - showing the offset of the strain and the other showing the strain calibrated, so it will be clearer to see the stabilized strain before the reset button is set to force the strain in the calibrated chart to start from scratch. Is it possible to do?

  Kind regards

  Helen

  Helen, you need not cross-post the question in several boards of Directors. It is a question of LabVIEW and LabVIEW, fortunately, is one of the most active panels.

  So, it looks that you want to have a zero cases that calibrates your strain of reading that would be offset by reading than zero cases. Otherwise, you want to be continuous playback using the zero defined previously.

  A simple solution for this is to put just a case structure within your loop of producer that is activated with a single button "channel zero". When this button is pressed, it takes the last points of data that have been read and creates a lag, so that the new data are now scaling as it.

  How is this look:

  

  If you plan to increase the size of this application, you should watch State Machine architecture or the messages in queue manager if you have a lot of data processing. This structure unique case for zero setting can only get you so far until it's hand.

• graph of waveform of filling via the property node

  Hello

  I want to fill a graphic waveform spirit multiple waveforms by programming. This means, the graph is the main VI, and use it in an another vi reference chart. Firstly I have to solve the correct reference waveform curve, then I use the "Value" property node The value must be the value of type variant, should be no problem. But the property node works only with table 1 d and not 2D.

  How can I fill it with table 2D programmatically? I use LabView 8.6, see attached example.

  Mitulatbati

  Hi mitulabati,

  You must specify the data type that you will be feeding to your chart, the default type is an array of 1 D.

  To do this, connect an empty 2D array directly on the graph, it will change the input to your waveform parameters and now the property node will accept this new data type.

  Hope this helps

• 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

• Save data indicator "graph of waveform" to CSV

  Hello

  I want to save the waveform on the indicator of "waveform curve" to CSV to a desired location. I don't know about the option "Export data to excel" but which don't account path desired user. Any suggestions on how to do it?

  Just look at your file IO functions. Write to the spreadsheet file, write to file action, etc..

• How to draw graph wrt times

  I m new to labveiw and this forum... anyone can tell how to draw simple

  graphic analog I / p with respect to time...?

  Why don't you do something like that? After the back if you have any questions.

• HP first colors to draw graphs?

  I want to develop a program that displays signs of card to play.  When the index is a heart or a diamond, I wish it were red.  However, so far in the documentation, it looks like we have black, dark gray, light gray and white.  It comes with a color display - I would have thought that we would have control of the color.  Am I missing something?
  Thank you

  Nick

  Chapter of the programming in this manual had not been updated yet. Search for RGB in the system catalog/help for more details.

  RGB(R,G,B,[A]) / / note, no alpha blending, but there is a flag of transparency

• Two signals to two graphs of waveform

  Hi all!

  I had some problems with my data acquisition software.

  I got two signals and I show two signals to two different graphic signals.

  How to separate the signals?

  There is an entry called "table". Just this thread in the 2D DBL table. Drag the bottom of the table Index down so that you have a second output sub-table. Wire of your graphics. Fact. No need to plug anything on the index entries.

• How to draw a box under a trace of waveform?

  Hi all

  I have a graph of waveform of 3000 point showing a series of peaks.  For one of these peaks, for which I know the beginning and end clues, I would draw a box under the waveform on the graph, to highlight its position programmatically.  I don't know if there is a way to do it.

  I figured out how to draw cursors at the beginning and at the end, but finally I do for multiple peaks, and forest of cursors quickly becomes confused.  A simple shaded box works much better.

  Any ideas?

  Many thanks in advance,

  RipRock99

  A great thank you GerdW!

  The code LV was very close to what I wanted to do and is easy to use to determine how to make my code produces the result I wanted.  Basically, I added another form of wave to my chart, using my known indices x to set the values of Y for the areas I wanted to be gray as + infinity and leaving the rest to =-infinity.  I then plotted this second graph on top of the original waveform and the property node to set the fill indicator for - infinite.

  That does not answer the general question of how to draw a filled rectangle with the coordinates on a graph, but this does not fix what I wanted to achieve.

  Bravo and thanks,

  RipRock99

  PS: I'm including a preview of the result and a snapshot of the code used to define the property node programmatically.  I do not understand my code just as it is complicated, and I would also need to add a large set of data.  I hope that the pictures are enough to help someone else referencing this Council!

• Create multiple vertical lines for waveform graph

  Hi all

  I use NI 9234 USB vibration of rotating machinery data acquisition. A simple VI was made for this.

  The next step is the analysis, signals were well displayed waveform, time, FFT, all important values... and so on.

  But I have a problem with multi vertical lines of the waveform graphs, it looks very simple, and I tried many ways but have yet to get it with a good solution.

  Vertical lines are used to display the frequency of breakdowns of machines (such as we post 1 X, 2 X, 3 X,... more harmonics).

  Does anyone have a solution for this problem?

  Thank you very much!!!

  Here's a very quick example (LabVIEW 8.2)