If you have been
struggling to use parameter functions like round, ceil, floor, isolate (which
converts units for parameters) or similar then you will need to know this. I
have been playing with this before
and it was only recently that I have found some hidden help pages which explain
why I had this problem and how to solve it.

round'n round |

The more you
live the mode you learn and I hope it stays this way for a long time; I know
there is a regression curve but I don’t want to taste it. Avid for knowledge I
am glad I learned something new so I had to write it down for you and me; I am
in this way hoping it won’t perish in the back of my mind.

The solution I
found last
time was to increase precision by multiplying with10 or one if it’s powers,
then use the function and then divide by that number again. Not elegant or good
looking but it did the trick until I found the correct solution for this.

So it seems that
units are evaluated before mean value of the parameter and in order to evaluate
the numerical part you first need to get rid of the units.

How do we do
that? We simply divide and multiply by the parameter units like this: "

*round(5.8 / 1 mm) * 1 mm*"Get rid of those units first. |

The help page
has a probably better example so shamelessly I will share it.

“

*Units are evaluated before the arithmetic portion of an expression. Therefore, the power operator applies to a unit before it applies to an adjacent numeric value. For example:*

*2 m^2*

*does not evaluate to 4 square meters, but rather means 2 square meters. The correct syntax is:*

*(2 m)^2 = 4 m^2*

*“*

There is a lot
of info about syntax errors as well like when you mix units with unitless
values without explicitly specifying this. That’s when you get that red text in
the functions window so make sure you glimpse over the help
pages here (2016) or here
(2014), if the page is no more, search Google for “Formulas and equations
for expressions reference” or “Expression Reference for Numeric Parameters”.

Later,

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