how to clear polar plot Programmatically

[FrankLi]

How to clear polar plot Programmatically, thanks!

[Mattetc]

I would guess the same way any other chart is cleared, though I haven't used polar plots much.

Normally I would right-click on the polar plot onn the front panel > create property node > Value (signalling) and pop that down on the block diagram. Then wire an empy plot to the input of the property node. If you just right click on the input and create constant it should do that by default.

[FrankLi]

Dear Mattetc

Thank you for your help. I tried your method, but haven't solved the problem yet. I paste my source code for your referece.

Thanks again.

[camerond]

You're not telling the program too clear the plot, you're telling it to paint the background white and stop.

Try this.

Cameron

[Mattetc]

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.

[FrankLi]

With Camerond and Mattetc's help, I have solved the problem.

I attached my vi to show what is the problem and how to solve it.

I saved the source file in version 11.0