Polar Plots

[MancPablo]

Morning/Evening Gurus (*delete as appropriate),

Is it possible to generate polar plots like the one in the attached? I have three inputs, a direction, a radial position and 3rd value for the colour scale (wind direction, windspeed then a gas pollutant from a weather station). I am basically looking for a Labview equivalent of Openair, if that means anything.

Thanks in advance

[altenbach]

I am sure you could just use an intensity graph and map your data into the grid accordingly Using interpolation for missing grid points..

You can use "plot images" feature to overlay the circular scales, etc.)

Similarly, you can use a 2D picture indicator.

Do you have some typical data?

[altenbach]

Either way, you need to map your data into a rectangular grid (which is also the case of your example images). For an example of overlaying grid lines and markers, have a look here.

[MancPablo]

Hi All,

Thanks for the info,and sorry for the slow response in replying. I was out of office last week.

I'll have a look at the thread and also try and post some data as an example.

Paul

[MancPablo]

Got some data together in between teaching undergrads! This would be the sort of thing, with a signal, a radial position and a direction. Would this work on your example code?

[GerdW]

Hi Pablo,

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@MancPablo wrote:

This would be the sort of thing, with a signal, a radial position and a direction.

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Something like this:

Now you need to implement an interpolation algorithm to "fill" the blank space between your data samples…

[alexderjuengere]

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@GerdW wrote:

Now you need to implement an interpolation algorithm to "fill" the blank space between your data samples…

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the easiest way is to accumulate a 2d Histogram with rectangular or square 'bins'

Spoiler

[alexderjuengere]

[ASTDan]

You could check this toolkit out

https://www.vipm.io/package/heliosphere_research_llc_lib_advanced_plotting_toolkit/#:~:text=The%20Ad....

I don't know if it will solve your problem but it has some handy plots you can make.

[alexderjuengere]

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@alexderjuengere wrote:

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@GerdW wrote:

Now you need to implement an interpolation algorithm to "fill" the blank space between your data samples…

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the easiest way is to accumulate a 2d Histogram with rectangular or square 'bins'

it is common to smooth the flat square bin with a 2d Gaussian Kernel as shown here:

https://forums.ni.com/t5/Machine-Vision/gaussian-filter/m-p/2443278#M38836