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Jun 19, 2020
07:33 AM

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Jun 19, 2020
07:33 AM

Split numeric solution

Hi,

I'd like to split the numeric solution of my equation to show the influence of the two factors without having the define new variables. I need to keep it as simple has possible. See p.7

For exemple ;

uc = 3 + 0.5 (where 3 is the section a and 0.5 the section b)

uc = 3.5

Thank you !

Camille

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Jun 19, 2020
08:10 AM

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Jun 19, 2020
08:10 AM

Im afraid that's not possible.

With the symbolic processor you can collect expressions on certain items. Consider e.g.:

You can do the following:

But the numeric processor does not have this capability.

Now you might try to use the symbolic processor to get the numeric answer by using the 'explicit' keyword. But I doubt that you can achieve the desired result, mostly because it is very hard to force the symbolic processor in its output. Not also that the symbolic processor generally does not handle Units the way the numeric processor does, or the way you might hope it does.

I think defining two variables, or function to hold the two expression parts is the best option to keep them separated.

Success!

Luc

7 REPLIES 7

Jun 19, 2020
08:10 AM

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Jun 19, 2020
08:10 AM

Im afraid that's not possible.

With the symbolic processor you can collect expressions on certain items. Consider e.g.:

You can do the following:

But the numeric processor does not have this capability.

Now you might try to use the symbolic processor to get the numeric answer by using the 'explicit' keyword. But I doubt that you can achieve the desired result, mostly because it is very hard to force the symbolic processor in its output. Not also that the symbolic processor generally does not handle Units the way the numeric processor does, or the way you might hope it does.

I think defining two variables, or function to hold the two expression parts is the best option to keep them separated.

Success!

Luc

Jun 19, 2020
08:24 AM

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Jun 19, 2020
08:24 AM

I see.

Thank you !!

Camille

Jun 19, 2020
08:45 AM

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Jun 19, 2020
08:45 AM

Best you *might* do:

Jun 19, 2020
08:47 AM

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Jun 19, 2020
08:47 AM

Yeah. that is very clear ! I'll go with this proposition.

Thank you

Jun 20, 2020
07:30 AM

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Jun 20, 2020
07:30 AM

Another Mathcaddy way of doing things - return the values as components of a vector ...

Stuart

Jun 20, 2020
10:18 AM

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Jun 20, 2020
10:18 AM

Great idea. Note that you don't need to transpose the vector:

Success!

Luc

Jun 22, 2020
07:19 AM

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Jun 22, 2020
07:19 AM

Thanks, Luc. You are quite right that it doesn't need transposing for this particular result. However, it makes indexing simpler when the result is in vector form and some functions/operators require a vector, so I just make it a habit to do the transposition.

.... I'm not sure whether it be a good idea to apply vector functions to single-row arrays or not. It might help or it might make things more confusing.

Cheers,

Stuart

.... I'm not sure whether it be a good idea to apply vector functions to single-row arrays or not. It might help or it might make things more confusing.

Cheers,

Stuart