Programming input data into a section of the mesh?

Hello,

I’ve imported a geometry into paraview that already has some solution data. I want to filter the Mesh into different regions using the Threshold Filter, group those regions together into a new object, and finally program each region to have a different value ex: Temperature: 500K

How can I do the last step programatically? Can someone point me to modifying cell/point properties like temperature?

Thanks

For each part you want to threshold :
Threshold + Calculator

Then, select all the calculators and :
GroupDataSet

Thank you!