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Looking for a special equation...

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pianoman2011

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I am looking for an equation into which you can plug a decimal number and your output will be the closest whole number.

Ex1. If my input is 3.49856, the output would be 3
Ex2. If my input is 10.6987, the output would be 11
Ex3. If my input is 0.3946, the output would be 0

And so on. Pretty much just an equation to round any number to the nearest whole number.

Thanks!

-Jakob
 





U

udanis

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pianoman2011 said:
I am looking for an equation into which you can plug a decimal number and your output will be the closest whole number.

Ex1. If my input is 3.49856, the output would be 3
Ex2. If my input is 10.6987, the output would be 11
Ex3. If my input is 0.3946, the output would be 0

And so on. Pretty much just an equation to round any number to the nearest whole number.

Thanks!

-Jakob
Click to expand...

Like a physical equation?
This can be done easily with a few lines in most programming languages
 
Vaporizer

Vaporizer

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What's wrong with the "if it's greater than 5" rule?
Use that on any number .....................
 
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pianoman2011

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Like a physical equation?
This can be done easily with a few lines in most programming languages
Click to expand...

A mathematical equation. Something that I could type into a graphing calculator.

What's wrong with the "if it's greater than 5" rule?
Use that on any number .....................
Click to expand...

This I know, but I'm asking for an equation that can round decimals mathematically :) let's just say machines don't think like us humans do.

-Jakob
 
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udanis

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pianoman2011 said:
Something that I could type into a graphing calculator.
Click to expand...


Oh that's easy why didn't you say so?

I have have ti-89 so there are the instructions for that model:
Mode
Display Digits
<right arrow>
<1>
<enter>



Then that automatically rounds to the nearest whole number.


Not sure if this is exactly what your looking for.

twhite828 you beat me too it.
 
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pianoman2011

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http://www.lmgtfy.com/?q=TI-83+round+to+nearest+int
Let me google that for you

What assignment are we doing for you?

-Trevor
Click to expand...

No assignment, just a personal math problem that I've been pondering. I'm in calculus, way above rounding numbers... And I tried googling this and yahoo-answering this before I brought it to LPF.

Oh that's easy why didn't you say so?

I have have ti-89 so there are the instructions for that model:
Mode
Display Digits
<right arrow>
<1>
<enter>

Then that automatically rounds to the nearest whole number.


Not sure if this is exactly what your looking for
Click to expand...

Thanks for the help, not quite what I was looking for though. I already knew about the float function, but there has to be SOME equation that is in the calculator to make it round from any decimal-number to a whole number. And this equation is what I'm trying to find.

-Jakob
 
Vaporizer

Vaporizer

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Really.................?
Ok.............
If Z = A.X and X < 5 then Z equals A.0 else Z = A + 1

There all in one line. Surely you can apply this to other decimals............
Hope you get an "A".

Edit: Something tells me calculus isn't going well.......:crackup:
 
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Trevor

Trevor

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pianoman2011 said:
No assignment, just a personal math problem that I've been pondering. I'm in calculus, way above rounding numbers... And I tried googling this and yahoo-answering this before I brought it to LPF.
Click to expand...

Heh, high school calculus. :crackup:

Rounding is a logic problem, not a mathematical one. I think you're barking up the wrong tree.

-Trevor
 
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pianoman2011

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Heh, high school calculus. :crackup:

Rounding is a logic problem, not a mathematical one. I think you're barking up the wrong tree.

-Trevor
Click to expand...

Nopeeeee college calculus at my local college! I don't know what you mean by barking up the wrong tree, I'm just trying to find a mathematical equation to round a number. I've done boolean algebra, would that be considered logic? To my knowledge, I cannot put boolean algebra into a normal calculator .There has to be some way to approach this problem to come up with a normal mathematical equation, be it using derivatives, integrals, powers, etc...

Really.................?
Ok.............
If Z = A.X and X < 5 then Z equals A.0 else Z = A + 1

There all in one line. Surely you can apply this to other decimals............
Hope you get an "A".

Edit: Something tells me calculus isn't going well.......:crackup:
Click to expand...

C'mon guys this isn't grade related. I'm doing this for my own fun, not to get an "A" in my stupid calculus class. Right now we're covering Bernoulli's rule at the moment... nothing related to rounding numbers. And no right now I have a 79% C :p

-Jakob
 
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D

Deleted member 8382

Guest
in java:

public int round ( double A){

if(A-|A| >= 0.5)
return |A|+1
else
return |A|

}

now, translate that into whatever the programming language your calculator is using to and there you go :)
 
D

Deleted member 8382

Guest
Oh, only maths!

I really can't think of anything, and I doubt there's one at all. But I think I know a way to abuse the calculator limitations to get this done: make the calculator loose them: Something like elevate to 99, then sqrt of the result. This will cause some decimals to get lost. Now use 9999999 ;)
 
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pianoman2011

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in java:

public int round ( double A){

if(A-|A| >= 0.5)
return |A|+1
else
return |A|

}

now, translate that into whatever the programming language your calculator is using to and there you go :)
Click to expand...

Hehe thanks hallucynogen :) Look's like I will have to do some research on this one.

-Jakob
 
Trevor

Trevor

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pianoman2011 said:
Nopeeeee college calculus at my local college! I don't know what you mean by barking up the wrong tree, I'm just trying to find a mathematical equation to round a number. I've done boolean algebra, would that be considered logic? To my knowledge, I cannot put boolean algebra into a normal calculator .There has to be some way to approach this problem to come up with a normal mathematical equation, be it using derivatives, integrals, powers, etc...
Click to expand...

Cool story bro, I've taken calculus at the collegiate level too. More of it at a higher level. And I'm sure a whole lot people here have more and higher-level calculus under their belt than I do.

Perhaps your problem is that you focus on showboating rather than on your studies.

-Trevor
 
D

Deleted member 8382

Guest
if you don't want to use custom functions, then... can limits be used? can a piecewise function be used?
 
Vaporizer

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I'm still wondering what is so hard abt the > than 5 rule.......
I'm no rocket scientist......I didn't fail math or programming languages either.
I'm at a quandary why to have it calculate the number when you can plug it in already rounded in your head or round the result in your head :thinking:

This is like the "duh" factor.............am I missing something?

Edit: Ok, do you realize the error factor when rounding via multiple times and used in an equation.......?
My last post here.......he's gotten responses in 4 formats.......enough is enough.
I may need to call the Troll Overlord in on this............lmao
 
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