How to delete unit
How to delete unit
(OP)
How can i delete a unit in mathcad ?
Mathcad is giving me a unit but it's wrong, i don't need a unit, just numeric.
Thanks in advance
Mathcad is giving me a unit but it's wrong, i don't need a unit, just numeric.
Thanks in advance





RE: How to delete unit
So if you say "L.yard:10", and "W.yard:15", then "A.yard:L.yard*W.yard=150" with no units.
Of course, not using units is cutting out a huge proportion of the power of MathCAD. For empirical equations where the units won't work out I strip the units inside the equation. For example (made up equation that doesn't mean anything):
MU.gas:π/4*(ID.pipe/in)^2.5*ln((ID.pipe/in)/L.pipe/mi)
This lets me input pipe ID in mm (or whatever length unit I choose that day), pipe length in ft, and MathCAD just uses the right magnitude in the empirical equation. I have some flow equations that I looked up 15 years ago, probably can't even find the reference today and before I started using this technique I had to remember the units of all the inputs. If someone asked me today to tell them the friction drop of 3 km of 200 mm pipe with 800,000 m^3 of gas flowing at 18 bar at the head, I can just input the given data without worrying about the units that my empirical equation needs--saves a ton of work. I've rewritten all of these old equations in this unit-neutral method and get far more consistent results.
David
RE: How to delete unit
You can go to Tools | Worksheet Options | Unit System and disable units and see if that clears the problem.
However, as a general rule I advise against not using units. Mathcad is pretty much the only tool you can find that will help you do dimensional analysis. This will generally get you out of more trouble than you can possible imagine, and is more than worth the bother it takes to avoid messing up the units.
TTFN
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RE: How to delete unit
See my attachment.
RE: How to delete unit
TTFN
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RE: How to delete unit
Also, you'll generally get more help if you backsave the file you are uploading to V11 (.mcd) instead of V12 or later (.xmcd), an awful lot of people refused to go to V12, V13, or V14 (and many of us don't see any reason to go to V15 either).
David
RE: How to delete unit
But still i can't calculate Zi...
RE: How to delete unit
I suggest that you ask your TA or instructor to help you with this. You are now trying to add inverse amps to ohms, which is even worst than your previous attempt, since inverse amps has no physically plausible raison d'etre. It's now patently clear that you have no idea how to set up whatever problem you're trying to solve.
TTFN
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RE: How to delete unit
I definitely agree with IRstuff, Mathcad's ability to do dimensional analysis has got me out of the poo on numerous occasions.
RE: How to delete unit
If you are going to use Mathcad to keep track of units (and I think you should!), make sure you apply appropriate units to ALL of your input data; then, Mathcad should keep track of all units for all of your subsequent calculations.
Hope this helps!
RE: How to delete unit
TTFN
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