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Can I assign the preferred units to a non optimised calculation?
 Rank: Newbie
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Joined: 12/06/2020(UTC) Posts: 3 
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Hi, Whenever I add MPa, GPa or even kN/mm^2 SMath seems to introduce the symbol "s" to the equation which looks to be the software changing it back to kg to do the back end calculations which makes sense. It changes it to kg/(m*s^2) The problem I have is that when I do the 'Optimise = none' to show all of the values for students, it comes up with the base units which confuses a lot of them. Is there any way of assigning the units for these individual values? So only the kg/(m*s^2) shown on the image attached. Thanks Adam   Query.sm (7kb) downloaded 5 time(s).
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  Rank: Advanced Member Groups: Registered, Advanced Member Joined: 13/01/2012(UTC) Posts: 2,647   Location: Italy Was thanked: 1329 time(s) in 875 post(s)
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Using a custom unit you could accomplish it, although you have to deal with some extra code if you want even the numerical result. In this example I've added a whitespace at the end of MPa (using CTRL+K), but it might be another character such as zero-width spaces or using an homoglyph instead of a latin letter (f.e. the cyrillic а in place of latin's a) ![2020-06-12 10_41_36-SMath Studio - [Page1_].png](/forum/resource.ashx?a=33312&b=2) |
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Joined: 04/07/2015(UTC) Posts: 6,866  Was thanked: 981 time(s) in 809 post(s)
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A Classroom about units is a delicate session on 3 counts: 1. Maths are unitless except trig [rad] 2. Engineering formulas are in convenient units. 3. Many solvers and other maths must be unitless. Query.sm (32kb) downloaded 7 time(s).
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The Unit-System subprocessor is SI ... useful/annoying. 
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Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 981 time(s) in 809 post(s)
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There are two ways of using unit system in simple project. 1. live sub-processing if you multiply the quantity by unit 2. silent by not multiplying ... explain Pink is live as you can see result in SI Yellow,is NOT multiplied , 'mm' is simply put in there then back space 'mm' to see a round place holder instead of rectangular. In that round place holder, insert mm from the unit panel ,,, see 'mm Look at silent result 'mm³
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Rank: Newbie
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Joined: 12/06/2020(UTC) Posts: 3
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Originally Posted by: Davide Carpi  Using a custom unit you could accomplish it, although you have to deal with some extra code if you want even the numerical result. In this example I've added a whitespace at the end of MPa (using CTRL+K), but it might be another character such as zero-width spaces or using an homoglyph instead of a latin letter (f.e. the cyrillic а in place of latin's a) Thanks David, works perfectly
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Rank: Newbie
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Originally Posted by: Jean Giraud There are two ways of using unit system in simple project. 1. live sub-processing if you multiply the quantity by unit 2. silent by not multiplying ... explain Pink is live as you can see result in SI Yellow,is NOT multiplied , 'mm' is simply put in there then back space 'mm' to see a round place holder instead of rectangular. In that round place holder, insert mm from the unit panel ,,, see 'mm Look at silent result 'mm³ Thanks Jean
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Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 981 time(s) in 809 post(s)
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So little SI applies to Engineering ! In my times, Mathcad, Matlab, Mathematica were not even pregnant. Try this example, anything Q, D, mu, rho. 
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