Invalid use of -. At least one of the operands must be scalar or the operands must be the same size. The units of the operands must be commensurate.

Invalid use of -. At least one of the operands must be scalar or the operands must be the same size. The units of the operands must be commensurate. In ee.semiconductors.n_mosfet

Argument 1 = {[1x1 double],'K'}

Argument 2 = {25,'C'}

T = {[1x1 double],'K'}

Tmeas = {25,'C'}

Warning: Unit'C' for parameter'Measurement temperature: Unit' specified in the block is not commensurate with the default unit'degC' specified in the library. Please specify a unit commensurate with'degC' for parameter'Measurement temperature: Unit'.

Warning: Unit'C

[Crystal Blackwell]

Ironically, I am working on a temperature based experiment as well. I am not sure if you are trying to create a custom component as myself.

I used a work around. The value function allows you to extract the scalar from variables with units. Then I performed the math using the scalar and reassigned the units afterwards using a T = { result of calc, reassigned unit} statement. I know in Temperature experiments, change in K = change in degrees C. So if that is your issue then this might help you out.

[Crystal Blackwell]

Of course the other option is to remove your units from unnecessary places.

Answer 1

[Sindar]

Wherever you specify the units as 'C', put 'degC' instead

[Waseem Haider]

Thanks for your kind response but i already tried it. now i got this error.

Unit expression C is not commensurate with degC. please provide a commensurate unit expression.