Why can I not use variables in math expressions?

Kevin_Beitel

It seems that existing variables are not valid in math expressions. I get a valid expression when defining #Y as a value of #X/2, but #X^(1/2) or sqrt(#X) are invalid expressions. Is this not allowed or am I doing something wrong?

kevin_o_toole_1

Right, an operation like sqrt(1 meter) isn't well-defined: Does it mean 1 meter? 10 centimeters? Or nothing at all? Onshape says the latter

If #X has length units, you can use an expression like sqrt(#X / inch) * inch, which is well-defined.

konstantin_shiriazdanov

it may be because of the units of #x, linear operations keep units the same but power of the value with units doesnt

kevin_o_toole_1

Right, an operation like sqrt(1 meter) isn't well-defined: Does it mean 1 meter? 10 centimeters? Or nothing at all? Onshape says the latter

If #X has length units, you can use an expression like sqrt(#X / inch) * inch, which is well-defined.

brian_brady

I get around this by using unitless variables.

john_mcclary

I also use unitless until the bitter end