About scientific notation

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About scientific notation

Post  Estrongs on Tue Feb 01, 2011 10:20 am

Hello.

I'm new user of Smart Math Calculator (free pack).

I was calculating the mass of a part (volume Ũ density) with the following expression:

488.5*pi/4*25*7.85E-3

But the result is n/a. Plese, could you to explain me how is the right method to write the expression.

Thank you,

Best regards,

Estrongest
Country: Venezuela

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Re: About scientific notation

Post  runiter on Thu Mar 17, 2011 10:52 pm

You can't type 7.85E-3 in this form, you must use 7.85*10^(-3) instead.

So:

488.5*pi/4*25*7.85*10^(-3)

In the next release we will hopefully add the feature to recognize the scientific forms of numbers.

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Re: About scientific notation

Post  Yukterez on Thu Aug 04, 2011 11:24 am

there should also be the possibility to type a sqrt for the square root, because most equations come in this form it is annoying to replace them with the √ sign and then replace it back before sharing the equation (in most boards √ turns to v)

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Re: About scientific notation

Post  Yukterez on Thu Aug 04, 2011 11:29 am

by the way and back to topic, i always use the form

488.5*pi/4*25*(7.85E-3)

(it aso works to put the E in a ()

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Re: About scientific notation

Post  runiter on Tue Aug 09, 2011 10:18 pm

Yukterez wrote:there should also be the possibility to type a sqrt for the square root, because most equations come in this form it is annoying to replace them with the √ sign and then replace it back before sharing the equation (in most boards √ turns to v)
That's a good idea. I will add it to out to do list.
Meanwhile there is a simple way that allows you to do that yourself. Simply add the following function to the global library of Smart Math Calculator:
sqrt(x)=√x

This way everytime you type sqrt(x) it will be same as typing √x

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Periodic Notation

Post  Yukterez on Thu Sep 08, 2011 1:45 pm

is there any notation for periodic numbers like 1/7 = 0,Ŋ142857 or 0,142857, or do I have to type 0,142857142857142857142857142857 etc if I donīt know the fraction value ?

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Re: About scientific notation

Post  runiter on Thu Sep 08, 2011 8:04 pm

You would have to type it (copy and paste would be easier naturally).
I'm not sure how often people need this kind of fractions but if there is demand for it I can add it to a future version.

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Re: About scientific notation

Post  Yukterez on Sat Nov 05, 2011 10:39 am

Admin wrote:Meanwhile there is a simple way that allows you to do that yourself. Simply add the following function to the global library of Smart Math Calculator:
sqrt(x)=√x
This way everytime you type sqrt(x) it will be same as typing √x
Where is this global Lib ?
Screenshot of my directory: http://666kb.com/i/byeqt4dkeztoyqkqt.jpg

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Re: About scientific notation

Post  runiter on Sat Nov 05, 2011 11:30 am

Hi Yukterez,
The file that contains global function definitions are saved here:

C:\Users\YOUR_USER_NAME\AppData\Roaming\Runiter\Smart Math Calculator\Functions.cfg
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Re: About scientific notation

Post  Yukterez on Sat Nov 05, 2011 1:56 pm

Admin wrote:Hi Yukterez,
The file that contains global function definitions are saved here:

C:\Users\YOUR_USER_NAME\AppData\Roaming\Runiter\Smart Math Calculator\Functions.cfg

but when i go there i have only 3 files in that directory:
http://666kb.com/i/byevqt39wfqa061xd.jpg

sorry for bothering, but i always get the formulas with sqrt and my notepad++ doesnīt save the root symbol either (converts it into a v)

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Re: About scientific notation

Post  runiter on Sat Nov 05, 2011 1:59 pm

That's probably because your global function list is empty.
Did you add a new function to your function library?
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arcosh / acosh

Post  Yukterez on Sat Nov 05, 2011 2:55 pm

No, I didnīt

But by the way you should add a arcosh (sometimes called acosh, not to be confused with acos) function so i can solve
cosh(a)=b
a=acosh(b)
Now I have to type
arcosh(x) = ln(x+√(x^2-1))
but unfortunately the "LN" fuction has that speed bug (:

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another few questions

Post  Yukterez on Sat Nov 05, 2011 3:39 pm

Admin wrote:That's probably because your global function list is empty.
Did you add a new function to your function library?
I duplicated another cfg File and filled in sqrt(x)=√x
http://666kb.com/i/byeyceryu8kc9winu.jpg ← Sreenshot
but it doesnīt work
Of course I closed the smc and reloadet it, but doesnīt work...
I had to save the cfg file to Unicode, ANSI didnīt take the root symbol
maybe thatīs why it doesnīt work ?
when I get it to work, will it also be possible to define new variables like y=123 etc ? do i seperate the functions or variables by comma or enter ?

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Re: About scientific notation

Post  Yukterez on Sat Nov 05, 2011 9:03 pm

Ok I now addert a new "Functions" Entry with function with field "Function": sqrt(x) / "Description": √x
which didnīt work, so I deleted the entry but there was a new "Functions.cfg" where I pasted the entry you suggested:
sqrt(x)=√x
I had to save the file in Unicode again instead of the old ANSI format because of the symbol, but it still doesn't work:

>> http://666kb.com/i/byf6jixeivcpg8nzu.png << Screenshot

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Re: About scientific notation

Post  runiter on Sun Nov 06, 2011 2:46 am

oh no, you should never edit the Function.cfg file!!
When you create a new Function, type the entire expression sqrt(x)=√x in front of "Function:"
You don't need to type anything in "Description" field.
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Re: About scientific notation

Post  Yukterez on Sun Nov 06, 2011 5:19 pm

Thanks a lot ! Now I also was able to define
acosh(x)=ln(x+√(x^2-1))
and all the kilometerlong time variables that define some giga light years in meters and such like the time since the big bang in seconds etc (: that will save me a lot of work, even if it was some work to figure out how to do so (:

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Re: About scientific notation

Post  runiter on Sun Nov 06, 2011 6:53 pm

It's good that you brought this to my attention.
Perhaps adding new function is not as obvious as it should've been. I will make some improvements in the user interface in the next release.
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another suggestion

Post  Yukterez on Mon Nov 07, 2011 8:23 pm

in the next update maybe you should add a dialogue field when one klicks on the delete a function button (the minus sign) - it is too close to the add (+) and edit (i) button, i already deleted a bunch of functions (good that i made a backup in the forum so i could easily restore them) (:

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Re: About scientific notation

Post  runiter on Mon Dec 12, 2011 12:42 pm

Good point, adding to todo list.
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