substitute variables

substitute variables - how to substitute variables into the function - Mensajes

#1 Publicado: 28/6/2022 15:53:21
Alžběta Vachutková

Alžběta Vachutková

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Is there some way how to substitute variables into the function? For example I define two variables:
a=1m
b=2m
and then I define function A=a·b=2m^2
But I need something like this A=a·b=1·2=2m^2
Is it possible?
#2 Publicado: 28/6/2022 17:05:29
⚜ Kenny Lemens, P.E. ᵂᴵ

⚜ Kenny Lemens, P.E. ᵂᴵ

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Greetings!

This is possible, but there is some work involved to make it happen. After you define your variables a and b, do the following:

STEP 1) Insert a text region (i.e., Keypress the double quotes [ " ]); this used to keep math/text on the same line.
Reference post #8 on forum: https://en.smath.com/forum/yaf_postst17400_Edit-workflow-for-text-regions-with-embedded-math.aspx


STEP 2) Type your equation 「A:a*b=#」, the text 「 = 」, and the equation 「A=#」 into your text region.

STEP 3) Right-click your 1st Equation, on your context menu you will see [Optimization]; change this option to [None]

STEP 4) Right-Click your 2nd Equation, on your context menu: uncheck the [Display input data] option.


NOTES: With units, it will simplify 「1*m」 to 「m」; so this isn't a perfect solution by any means.

Example:
Here is a file with an example: SMath - substituting variables into same equation.sm (46,02 KiB) descargado 1406 vez(es).
SMath - substituting variables into same equation.jpg




Hope this helps!
Kenny Lemens, P.E.
"No matter where you go, there you are." -Buckaroo BanzaiHotkeys: https://en.smath.com/forum/resource.ashx?a=45771&b=2
#3 Publicado: 28/6/2022 22:43:35
Alvaro

Alvaro

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Hi. It would be great to have a new equals sign, such as ≡ , that shows the substitution of an expression for its values, but without the rounding problems that this proposed solution has, and showing the final result in Pascals, perhaps.

Clipboard04.jpg

show.sm (14,6 KiB) descargado 1415 vez(es).

show.pdf (56,88 KiB) descargado 819 vez(es).

Best regards.
Alvaro.
#4 Publicado: 29/6/2022 11:15:54
Jean Giraud

Jean Giraud

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When it comes to expand/explicit maths formulas,
it soon turns a monkey business, that hits the wall.
Inspect the 14 same representations, and few more.
Enjoy ... Jean.

Maths 0 Formula Representations QUICK.sm (33,43 KiB) descargado 1476 vez(es).
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