How do u modify polar plots

I would like to modify/control as many features on a polar plot as possible. I am aware of the property node feature, but those seem to be limited in what can be modified. I would like to have control over plot line thickness, fill-in solid color under data, and text size. I have seen these things modified before but I can't figure it out myself. Has anyone had this same issue?
Thanks!
Solved!
Go to Solution.

robin533,
It sounds like with as much customization as you want, you might have to dig deep in the code. I would suggest trying to get into the low level code of the Polar Plot VI and seeing if you can modify what it is you're looking for. You can access some pen controls and color options this way.
Cheers!
KyleP
Applications Engineer
National Instruments

Similar Messages

Polar plot help

I'm working a project where I need to plot X & Y data to a polar plot. Actually, what I really want is to plot X-Y data on a compass rose, and show 'clock" position instead of angle headings...but I can fake that well enough for now...
Attached is my test vi for plotting to the polar plot. I've repalced the standard LV polar plot with a version available in one of the support forums that plots points instead of lines. Looks right to me..but no data plotted Any hints or direction?
Also, I ideally want to keep continually plotting data points - one set of coordinates after another. Any thoughts on the best way to do that? While loop maybe? I used to use labview prtty regularly, but it's been a while, so forgive me if these are easy questions.
Thanks!
Attachments:
polar_test.vi ‏41 KB

Updated vi attached for my polar plot test.I've replaced the modified "polar plot" vi with the original labview one. I can see data passing through everywhere, right to the plot itself...just don't see anything showing up. Is there something I'm misunderstanding about how to use the polar plot?
Attachments:
polar_test.vi ‏63 KB

How can I change the Y-axis (circular) grid spacing, in Polar Plot VI?

When using Polar Plot VI, I need more control over the plotting parameters. This means tweaking the sub-VIs in various ways. What I need to do most is make the polar magnitude axis less busy, i.e. only draw circles every 10 instead of every 5 divisions, when using a range of 0 (outermost) to -80 (innermost).
The magic 'magnitude axis subdivisions' variable seems to be generated in Calc Scale Specs sub-VI, and output as an array of clusters, but I can't quite see how it's created and from what.
Please can anyone help me gain control over the number of magnitude division circles generated?
Many thanks!

I think if you go inside the Calc Increment.vi and modify the Increment output terminal it might change what you want to see. Try putting a multiply by 5 or ten into the case structure for when the log is false.
Attachments:
polar plot calc increment.jpg ‏90 KB
modify calc increment.jpg ‏104 KB

How to interpolate impedance measurements in a polar plot

Hello,
I do impedance measurements and plot them afterwards in a polar plot (see attached VI). Because of a sharp resonance it is hard to get a high resolution there.
- Is it possible to do an interpolation between the the measured points?
Thanks a lot.
Best regards,
Michael
Solved!
Go to Solution.
Attachments:
Interpolation.vi ‏47 KB

Take a look at the attached. I created an array to resample the data based on the data itself and then used the Resample (constant to variable) to generate interpolated data. This way the resonance is interpolated with more resolution than other locations. Does this do what you want?
There is a constant on the block diagram that controls how much more the resonance will be interpolated.
Message Edited by rpursley8 on 03-22-2010 12:02 PM
Randall Pursley
Attachments:
Interpolation-1.vi ‏76 KB

How to draw polar plot?

Hi all,
I want to draw a polar plot in LV. I am having different values of frequencies & voltage/current values at respective freuencies. Can anybody guide me?
Vaibhav Gandhi
B.E. Instrumentation & Control,
INDIA

Hi Vaibhav,
LV already has a polar plot indicator and comes with an example of how to use it...
Btw. usually you plot a signal vs. phase on a polar plot. How would you plot vs. a frequency?
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

How to clear polar plot Programmatically

How to clear polar plot Programmatically, thanks!

This doesn't technically clear the plot, it's writing an array of zeroes to it. But if all you want is to make the plot appear to dissapear that's ok.
I've taken a closer look and found that you have to use the Erase First property node to set which pictures can be erased. The default is never erase any, which is why the plot doesn't clear.
Then, you can get an empty picture constant from the pictures sub-pallet and wire that into the Value (Signalling) property node and it will work.
I have attached one VI with and one without the event structure to tidy things up, but you may not have the event structure available to you. I wrote these in LV2012.
Attachments:
PolarPlotV1.vi ‏16 KB
PolarPlotV2.vi ‏22 KB

How can I increase line width on polar plot?

The lines plotted on a LabVIEW 6 polar plot (picture control) are very thin and do not show up well when printed. I would like to increase the line thickness (as can be done easily on the graph controls), but looking through the polar plot VIs, I cannot find any obvious way of doing this.

The polar plots basically use the picture control to draw the lines on a plot. To increase the thickness of the lines you would have to draw another line right next to the line. I'm sure this could be done, but would require alot of messing about with the drawing subVI's to draw all lines in duplicate.
Alternatively you could plot the graph twice, but the second plot has an origin 1 pixel out. This will double the thickness on the screen, but i dont know what it will print out like. See attached example in LV 6.0.
Another thing to try is change the plot colours. You can make the gridlines black (instead of grey), and paint the background white. This makes the lines show up much better. I will also include this in the same example.
I hop
e this helps you..
Kim
Attachments:
Polar_plot_lines.vi ‏37 KB

How to add cursors on polar plot

I want to add cursors on polar plot just like the XY graph has. I am new to LabVIEW and want to be able to move those cursors by mouse movements and get the respective Angle and Magnetude values. Since the polar plot is a picture I am unable to do the same. So my questions is;
Can I add cursors on Polar plot? If not, then, is there any other way to do so?

Hi!
I've found an old post about you issue: http://forums.ni.com/t5/LabVIEW/the-best-way-to-make-a-nice-POLAR-plot-in-LV/td-p/115478 (but no easy solution is provided ).
You can use an XY plot, of course, but it's up to you to convert your polar plot to the cartesian coordinate system of the XY plot and the way back for the cursor coordinates.

How do you get the polar plot VI's to work correctly?

I have the data in a file and can see the correct data when placed on a smith chart, but not on the polar plot. It looks like it is mirrored on the Polar plot.

There are a couple of examples hat come with LabVIEW that might help you. They can be found under Help >> Examples >> Advanced >> Picture Control >> "Polar Plot" and "Simple Smith Plot". As a way of comparing the two different plots, I had them plot the same data points. It looks like if you have a lot of data points with a lot variability then you want to use the Polar Plot. The following webpage may provide some infor regarding smith plots:
http://zone.ni.com/devzone/nidzgloss.nsf/webmain/80EC3CE5F229DB818625686A0078B8D9?OpenDocument
Chris_Mitchell
Product Development Engineer
Certified LabVIEW Architect

Polar Plot Problem

Hello!!!!
I have created a Polar plot, but there is a line that shouldn't be there, what do I have to modify, so it shows exactly what I want??? I Have attached a picture of the graphs that I want, and my example VI, I hope someone can help me.
Sorry, The arrays have to be filled out whit the next info:
I: -1, 1,-1,1
Q:1,-1,-1,1 THIS WAY IT does what I need.
Saludos.!
Mensaje editado por Special K
Attachments:
img030.jpg ‏305 KB
graficar2.vi ‏43 KB

Special K wrote:
Im using LABVIEW 8.0 how can I create my own polar plot??
You would need to use the picture functions to draw your graph, in the same way that the Picture Plot VI does. If you open up that VI you will see how it's done.
Have you seen the images of what I want to obtain?? Is it possible to create those graphs??
Yes. And yes. The "how" is a different matter. It's quite trivial to create an XY graph to draw your points, so that's why I suggested to use that. If you do not know how to draw an XY graph, open the Example Finder (Help -> Find Examples) and search for "graph". You will see lots of examples on graphs, including one for XY graphs. All you need to do is provide 4 points to the graph, and change the plot type to "scatter" so you just get the points instead of lines. Pretty simple.

Multiple polar plots into a 3d plot

my test measures a light source, for each iteration (of the test) the detector moves up in elevation 5 deg (starts at 0 deg) and takes a data point every 2.5 degrees in azimuth (for a full 360 deg). My data array is a 3d array where on each page I have 3 columns azimuth, elevation (the elevation is constant for each iteration) and measured data. The question is: I cannot seem to plot it into a 3D graph...polar plot no problem...does any one have any insight?

“Create color map.JPG” illustrates one way to create the map for the forth dimension.
“Set Axis Range.JPG” how I manipulated the axis range and properties. Note: It appears all CW 3-d graph items start counting at “1” not “0”.
“Add Cursors.JPG” shows the cursor work.
I hope this helps,
Ben
Message Edited by Ben on 09-24-2005 03:48 PM
Message Edited by Ben on 09-24-2005 03:49 PM
Message Edited by Ben on 09-24-2005 03:49 PM
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction
Attachments:
Create color map.JPG ‏37 KB
Set Axis Range.JPG ‏71 KB
Add Cursors.JPG ‏62 KB

Polar plot scale labels and background colour

Dear Labview Forum,
I am trying to create a polar plot. However when I put the polar
plot indicator on my front panel and wire up some data and parameter
control boxes, the scale labels are missing. See polar plot
basic.VI. Are the scale labels there or are they the same colour
(black) as the background and hence not visible?
When you compare this to the polar plot demo, the background is white and the scale labels are present.
How can I control the polar plot background colour parameter?
How can I control the scale label colour and visibility?
Regards,
Jamie
Message Edited by Jamieg on 01-17-2007 02:18 AM
Using Labview version 8.0
Attachments:
polar plot basic.vi ‏31 KB
Polar Plot Demo.vi ‏33 KB
polar plot basic.vi ‏31 KB
Polar Plot Demo.vi ‏33 KB

I'm so sorry ... i am also unable to find the Propety Node... i think i mistook changing the Label/Caption bg colour as changing the whole bg colour... i'm so sorry...
i've tried searching but to no avail... my apologies...
all the best to your application...
Best Regards,
JQ
LV 8.0 user...

Polar plot from excel

I have some data in the form of an excel table with two columns
(frequency and amplitude). I wish to plot this as a polar plot in
labview and then carry out convolution/correlation with another set of
data. How do I achieve this seemingly herculean task?

Look at this example file. Labview has a built-in polar chart.
C:\Program Files\National Instruments\LabVIEW 7.0\examples\picture\demos.llb\Polar Plot Demo.vi

Polar plot line color

Hello
I have three vector plotting using polar plot.vi the problem is when I tread to shift the line color, only use black, I need three diferents colors any suggestion?. I put a picture with my block diagram.
I would like too chance the line width how to I can realice this using mi VI?
thanks
Danilo

Abel_Souza wrote:
Hi Danilo,
I think you can use color box contants in a case structure, each case sent one color constat, so you can select colors when you select a case on case structure.
Regards,
Well that is part of the story but the picture input tunnel should be changed to a SR if you wnat more than one plot.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

Multi-Phasors using polar plot

Hello everybody
I used LabView 7.1 and I need plot three phasor, at the moment I use Polar Plot, but I don't know how to plot some phasors, any idea?
Another problem is how to I would chance the line width and form.
Thanks
Danilo

Hello erick.yamamoto
I managed plot three phasors, but I don't know how to chance the colors, form, and with of this phasors.
Danilo
Attachments:
VISincrofasor.png ‏27 KB

How do u modify polar plots

Similar Messages

Maybe you are looking for