Hi All, Is there any way to extract resistance and capacitance (pex) of selected net in magic? Thank you.

extresist include <netname>

will cause

extresist

to extract resistance information for only the specified net. That's not quite what you asked for, especially as the parasitic capacitances will still be calculated for all nets. For that, you will need to filter the netlist to get only the capacitance lines related to the net of interest.

Ok. Thank you so much @Tim Edwards