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

Estrongs
Guest

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.

_________________
Saeid Nourian, Ph.D.
President of Runiter Company
http://www.runiter.com

runiter

Posts : 132
Join date : 2007-12-05
Age : 38
Location : Boston, MA, USA

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)

Yukterez

Posts : 22
Join date : 2011-08-03

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

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

Yukterez

Posts : 22
Join date : 2011-08-03

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

_________________
Saeid Nourian, Ph.D.
President of Runiter Company
http://www.runiter.com

runiter

Posts : 132
Join date : 2007-12-05
Age : 38
Location : Boston, MA, USA

## Periodic Notation

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 ?

Yukterez

Posts : 22
Join date : 2011-08-03

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.

_________________
Saeid Nourian, Ph.D.
President of Runiter Company
http://www.runiter.com

runiter

Posts : 132
Join date : 2007-12-05
Age : 38
Location : Boston, MA, USA

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

Yukterez

Posts : 22
Join date : 2011-08-03

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

runiter

Posts : 132
Join date : 2007-12-05
Age : 38
Location : Boston, MA, USA

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)

Yukterez

Posts : 22
Join date : 2011-08-03

That's probably because your global function list is empty.

runiter

Posts : 132
Join date : 2007-12-05
Age : 38
Location : Boston, MA, USA

## arcosh / acosh

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 (:

Yukterez

Posts : 22
Join date : 2011-08-03

## another few questions

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 ?

Yukterez

Posts : 22
Join date : 2011-08-03

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

Yukterez

Posts : 22
Join date : 2011-08-03

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.

runiter

Posts : 132
Join date : 2007-12-05
Age : 38
Location : Boston, MA, USA

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 (:

Yukterez

Posts : 22
Join date : 2011-08-03

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.

runiter

Posts : 132
Join date : 2007-12-05
Age : 38
Location : Boston, MA, USA

## another suggestion

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) (:

Yukterez

Posts : 22
Join date : 2011-08-03

Good point, adding to todo list.

runiter

Posts : 132
Join date : 2007-12-05
Age : 38
Location : Boston, MA, USA