Labview Intensity Charting/Graphing

How do you get an array with three columns of data to be 3 individual arrays and then graph them in an intensity graph/chart? I am pulling data from tcp and it is output as a comma separated string and a carraige return to denote an end of variables so the output in the data stream looks like:
(X,Y,Intensity)
6,80,9,
74,14,0,
51,69,1,
then i conver it to s spreadsheet style 2D array. I talked to the labview reps and they said I need to use something like Replace Array Subset. To do this. I have included the VI and an image of what my current setup results in. Basically I just want the intensity to be plot at the X and Y coordinate specified in the set. Thanks!
Attachments:
TCPGraphing.vi ‏40 KB
labview.png ‏108 KB

If I understand correctly, you will want to initialize a 2D array of the correct size for your data filled with zeros. As the data is read in, use the Replace Array Subset to replace a zero with the new data. The X and Y coordinates will determine which element of the 2D array to replace with the associated Z value. Something like the attached maybe?
Randall Pursley
Attachments:
Replace.png ‏20 KB

Similar Messages

Labview crashes with intensity chart

Twice this morning, LV2010 has hung ("program is not repsonding") when I have tried to reposition an intesity chart on my front panel. In one case I copied the chart from a NI example program into my VI. When I tried to reposition the chart on my front panael, LV stopped responding. Same thing happened when I tried again; the second time, I got the intensity chart from the charts and graphs palette. I have LV 2010, version 10.0f2, and windows XP. Thanks.
Solved!
Go to Solution.

Hi there!
The following KnowledgeBase explains why this might be happening.
http://digital.ni.com/public.nsf/allkb/9A8FB888BFCED9658625721500434A31
Basically, that chart might be holding a lot of data, and when you move it, LabVIEW has to rearrange all that information in RAM as you move the chart. You can either write smaller data, or save all that data in an array separate from the chart at the end of execution so you can save it. If you want to view it in a chart later, just input it back into a chart.
Ravi A.
National Instruments | Applications Engineer

MATLAB pcolor and LABVIEW Intensity Graph

Hello all
I have a data matrix which i want to plot using intensity graph of LABVIEW. My problem is that when i plot this matrix using MATLAB pcolor along with "shading interp" command, i got a very fine and smooth coloring graph of this matrix, however, using LABVIEW Intensity graph along with getcolor vi, i was not able to get a smooth coloring graph comparable to MATLAB pcolor. I have tried many setting but results were not satisfactory
Is this due to a limitation of LABVIEW intensity graph or i am missing something? Kindly help me
Best Regards
Asim

Thanks for providing that Asim, unfortunately the VI you provided is unusable as-is. There is a subVI missing, and while not critical, it's difficult to tell how you're setting up the intensity graph without that VI. Additionally, it doesn't appear that there is any graph data included in the VI you provided and a third-party software license would be required to use this VI. Could you upload the data you're handling in a format that works without any external tools?
As for thoughts on the differences in the plots; they are largely similar in appearance, although it does appear that you're using a different color scale in LabVIEW- the majority of your scale is in the blue-green range, rather than continuing linearly through yellow, orange, and red. You're going to lose a lot of visual resolution in the ranges you're highlighting due to this. The plot you're trying to achieve also appears to be interpolated or blurred around the edges of bins, are you actually plotting data between integers on the x-axis, or is this an artefact introduced by the software?
Regards,
Tom L.

Labview Intensity Graph Vertical Axis Label

When I change the font of the vertical axis label of a Labview intensity graph, the label disappears. Is this a Labview bug or is there a way to correct the problem?

Here are those screenshots... I was a little quick to submit
- JLS
PS - of course, when you're editing the free label, it doesn't have those nasty affects, and if you group the objects (see the Free Label and Grouping screenshot) it behaves (at least cosmetically) much like a native graph label
Best,
JLS
Sixclear
Attachments:
Free Label and Grouping.JPG ‏81 KB
While Typing.JPG ‏66 KB
After Typing and Clicking Off the Graph.JPG ‏67 KB

How can I make a spectrogram from a soundwaveform using the intensity chart function?

I want to make a spectrogram for a sound waveform where the x-axis is time, the y-axis is frequency, and the intensity is amplitude. I performed a DFT on the sound waveform, then used it as an input to the intensity chart function. Every time I run my program the x-axis has a scale from 0 to 1 sec, when my sound is longer. The y-axis doesn't give me the same range of frequencies as the DFT. The intensity scale is correct. Can anyone suggest another approach? The labview example did not help since I'm not generating an array and creating the intensity chart at the same time.

Hello -
You could probably use a 3D surface graph.
I am including an attachment to show you what I mean. This example program is available here. I just made a few modifications to make it look as an intensity graph:
1. By right clicking on the graph and going to CWGraph3D >> Properties and selecting the Grid Planes tab in the Graph tab, I unchecked the grids, to show just the graph. Then, I went to the 3D tab in the Graph tab, and selected Towards X-Y Plane in the View Direction section. Click OK.
2. Then, I right clicked on the graph again and went to Advanced >> Enabled State and selected Disabled, so
that the user cannot change the orientation any more.
You can build your own plot using time and frequency as X & Y, and the amplitude will give you the color. You only need to adjust the orientation so that you can see it from �the top� and it looks like an intensity plot.
Hope this helps.
Attachments:
XYZ_Plot_Example.zip ‏57 KB

How do I format 1D waveform array to output to intensity chart?

I've tried to modify the "Cont Acq&Graph Voltage-Int Clk.vi" example vi to output to an intensity chart. The problem is the chart only accepts a 2D array of input data, while the DAQmx vis are giving me a 1D array of waveform data. How do I fix this?
Thanks in advance...

Thanks! Here's an example of the first few samples of the data I'm getting, plus the header:
Channels 1
Samples 1000
Date 2006/07/24
Time 13:41:57.315999
Y_Unit_Label Volts
X_Dimension Time
X0 0.0000000000000000E+0
Delta_X 0.000100
***End_of_Header***
X_Value Dev1/ai0 Comment
0.068936
0.028033
0.038671
0.047368
0.053086
0.052326
0.039342

How can i specify pixels in the intensity chart ?

Hi,
I want to specify the number of pixels in the intensity chart . I have 56 values that want to be displayed . How can i do that? .
Solved!
Go to Solution.

Hi jerryvdk,
By specifying the Number of Pixels, do you mean allowing only a specific Plot Area Size for the chart itself?
You can modify this through the use of a Property Node.
Steps to Change the Plot Area Size:
Right click on the Intensity Chart.
Scroll through Create » Property Node » Plot Area » Size » All Elements.
This will create a Property Node which will allow you to change the draw area property of the Intensity Chart.
By specifying a draw area of 56x1, this would allow a 56px draw area size. Is this what you meant?
Alex Thomas, University of Manchester School of EEE LabVIEW Ambassador (CLAD)

Append Intensity Chart to Report

Hello everybody
I am trying to append an intensity chart to word report generation VI, any ideas to do this? I am thinking about append front panel image to report vi. but it doesn't accept my chart reference.
The idea is to send the picture to report whenever defect is detected by the intensity chart during the test
thank you

You cannot have multiple copies of the Report Generation Toolkit installed to different LabVIEW versions. If you want to use the Report Generation Toolkit in LabVIEW 8.2, you will need to uninstall it from your previous LabVIEW version, then reinstall it to LabVIEW 8.2. If you really need the toolkit installed to multiple LabVIEW versions, there is a workaround outlined in this KnowledgeBase entry, although it's not a complete workaround for the Report Generation Toolkit, since this toolkit is one of the only ones that actually replaces shipping LabVIEW files.
We are currently investigating ways to alleviate the pain of using toolkits with multiple LabVIEW versions. Let me know if you have any other questions.
-D
Darren Nattinger, CLA
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Label Frequencies in Octave Intensity Chart

Hi, I show some octave spectrum in an intensity chart. All is fine, but I can not label the y-axis ticks correct with the frequencies. The Y-axis shows only the index.
In the array left I show the correct text for the y-axis.
How can I replace the 0,1,..,10 with "31,5","63",..."16000" ?
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I can not attach a vi? I get the errormessage:
Correct the highlighted errors and try again.
The attachment's IntensityOctave.vi content type (application/force-download) does not match its file extension and has been removed.
Attachments:
IntensityOctave.zip ‏8 KB

Do you mean
But I get only:
I understand MarkerVals[], that at this values of the axis a marker should drawn. But the y axis range is from 0..10 (column index).
I need instead a property MarkerText[] (as string array) to assign the text for the markers.
vi attachment: there are many posts with vi files as attachments.
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In SharePoint Foundation 2013 I want to create a report / chart / Graph for Employee (Employee Id,Employee Name & Department) which will show month wise from which date to which date Employee are on vacation in particular department.
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Hi,
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Print Charts/Graphs on Smart Forms

Hi Seniors,
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Dear Bouman,
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My xml publisher report not display chart/graph in r12 apps

dear all
my xml publisher report is not showing chart/graph in oracle apps r12.1.1, but it's locally preview fine in MS word
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Hello Adnan,
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CR 8.0 pie chart/graph doesn't appear in web browser

Post Author: kevind
CA Forum: Charts and Graphs
Hi,
I am using a CR 8.0 report (containing data in tabular format and Pie/Bar graph) with Web component Server.
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Hello Subramaya,
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12/01/2012 12:00:00 AM
12/31/2012 12:00:00 AM
Hi
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Raj,
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Labview Intensity Charting/Graphing

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