[LemuelCRA]

Hello, I'm working in Tecplot 360 EX 2018 R2 and am trying to set all values of a specific variable to NaN for just one zone. My aim is to label nodes in one zone without cluttering the view with labels from another. That's why I thought maybe setting NaNs could do the 'blanking' job.

Specifically, I want to set the variable {Head} to NaN in a particular zone. I attempted using the Specify Equations tool with the command:

{Head} = NaN

However, this results in an error:

Unrecognized Command. Error occurred near position marked with "@" below:
{Head} = @NaN

Has anyone encountered this or know of alternative methods to accomplish this? Any advice would be appreciated!
Thanks!

[wsfowler]

Interesting idea. Tecplot 360 hasn't really been designed to handle NaN values, but I ran a little experiment to try your idea.

I was able to set data values to NaN using our PyTecplot API by doing the following.

1) Allow Python connections via "Scripting > PyTecplot Connections" and toggle on "Accept connections"
2) Run the following Python code to set the "C" variable of the second zone to NaN

import tecplot as tp
import math
tp.session.connect()
ds = tp.active_frame().dataset
num_points = ds.zone(1).num_points
ds.zone(1).values("C")[:] = [math.nan]*num_points

With NaN values, Tecplot 360 2024 R1 still renders the data labels and displays them as "NAN". However, Tecplot 360 chooses to not render the contour coloring for that zone.

It appears that, at this point, there's no way to have a zone "opt-out" of rendering the Point/Cell labels.

If you'd like to make a formal request for us to update this behavior, please contact our support staff at support@tecplot.com.

Thanks,
Scott

[LemuelCRA]

Thanks Scott!
I will opt for the request.