Method to scale up or down lots of resistor/capacitor value together

If you do not want to invest in own coding, you could split up your problem into A) selecting the instances you want to change, and B) to modify properties.

A) The selection part can be done with the Menu: Edit->Select->Select by Property.
If you can live with searching for a single property, than it is just a single run.
Searching for multiple properties could be done with multiple searches, the first one with 'Form Action' set to 'select', and the following set to 'deselect' and searching for those things you do NOT want to have.
e.g. seaching for instances of cellView 'res' with property 'r' of 100 or smaller would be:
find 'cellName == res' with Form Action 'select' (would select all resistors), and
find 'r > 100' with Form Action 'deselect' (would deselect those with higher value than wished)


B) For changing the propery values I'm not aware of a builtin feature that would make live easier; however, you can use a simple skill one-liner:

foreach(inst geGetSelectedSet() let((p) p = dbGetPropByName(inst "<property name>") dbReplaceProp(inst p~>name p~>valueType strcat("<FACTOR>*" p~>value))))

Just copy/paste to CIW and execute while your elements are selected.

You need to modify at least the <...>, which is the property name you want to change (probably "r" for the resistors and "c" for the capacitors), and second how to handle the value. CDF values are usually strings, so if you really want to calculate with them, you would need to evaluate them first, than do your calculation and convert them back to strings. Just to replace/extend the existing string is much easier, I'd prefere in your case just to add a variable as factor, which would then show up in the simulator and can be changed easily in simulation. The example above is set up for this already, you just need to enter the name of the variable (e.g. X and Y, something more descriptive would be also fine).

You would have to trigger the CDF callback, if you change certain values in e.g. complex transistor pcells, but it is not necessary for the cap/pcapacitor and res/presistor of the parasitics you are probably tinkering with.