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ptc-68037491-Visitor
1-Visitor
Dec 15, 2014 3:25 PM UTC
Solved

Using the solve function in Prime 3.0 with units not working

Hej

I just downloaded Prime to try it out, and i like the layout and general feel a lot better than MathCad15, but I've run into a huge problem.

I used the symbolic solve in 15 a lot, solving for a missing variable in an equation, where all others were defined with units and then using the normal '=' in the evaluation tab. Then 15 would combine the units and spit out a useable result, where I could change the units by writing the desired unit on the end. The picture below shows what i mean:

Capture.PNG

Now trying to do the exact same thing in Prime 3.0 gives me the following

Capture.PNG

Any help would be appriciated!

Fred_KohlheppAnswer
23-Emerald I
Dec 15, 2014 5:13 PM UTC

Actually, your problem is that Prime doesn't recognize kJ as a unit. Define that and . . .

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5 replies

Fred_Kohlhepp23-Emerald I
23-Emerald I
Dec 15, 2014 4:35 PM UTC

You're trying for a symbolic solve; but the symbolic processor doesn't recognise units. Try a numeric solve block.

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ptc-68037491-VisitorAuthor
1-Visitor
Dec 15, 2014 4:38 PM UTC

And how exactly do I use numeric?

Why is it 15 seems smarter than Prime?

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Fred_Kohlhepp23-Emerald I
23-Emerald I
Dec 15, 2014 5:15 PM UTC

15 is smarter than Prime. Prime 3 is the first that could actually be considered "useable," version 15 will still do many things that Prime will choke on.

That said, Prime is the path forward.

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