Homebrew [Release] Graphing Calculator

RikuKawai · Oct 9, 2015

Pedeadstrian said:
But they can connect to the internet, so it's barely different than using a smartphone, which I imagine most teachers/schools have rules against.

I would imagine your school is the exception. The high school I went to don't even allow you to have mp3 players, regardless of whether or not you're in class. Of course, I still did. I knew how to hide the wires in my hoodie.

My school has no issue, I use my 3DS in math with this app.
My school has WiFi everywhere and I also carry my 3DS all the time along with my iPod.

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gamerboy1995 said:
Is there any advantage to using RPN in terms of the way the 3DS handles it (ie maybe it computes faster?), or was that just a personal choice on your part? Maybe you could add a settings toggle to switch between RPN and the normal notation to make it easier for the like 99% of us that don't use RPN?

Also, I was almost disappointed to her this didn't have a Z axis, because how cool would it be to use the actual 3D part of the 3DS? it would take forever to compute the points though.

Algebraic Notation using peasant.
Learn RPN, it's faster and better.

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flarn2006 said:
This is a simple graphing calculator that works with RPN equations.

Use the circle pad to move around, L and R to zoom, and hold X or Y to use the cursor. Press Select to reset the view.

Get the latest version from here: https://github.com/flarn2006/GraphCalc3DS/releases.

Multiple graphs, a numerical scale, and the ability to snap to units with the cursor would be great.
Trying to say, get the value of Y at X=5 can be very annoying because your cursor always ends up at X=5.12475 or something.

Like others have said, 3 dimensional graphs would be cool with stereoscopic rendering.
4 dimensional graphs should be possible too.

flarn2006 · Oct 9, 2015

videogame57 said:
Multiple graphs, a numerical scale, and the ability to snap to units with the cursor would be great.
Trying to say, get the value of Y at X=5 can be very annoying because your cursor always ends up at X=5.12475 or something.

Multiple graphs are already a thing; I added that in the new version I posted last night.

Snapping to units is a good idea; I'll try and come up with a way to make that work well from a UI perspective. One thing I plan on that should help is making it possible to use the D-pad for more precise positioning, but I understand that wouldn't work if you just want to see the value at a certain location, unless you're okay with zooming in really far.

What do you mean by a numerical scale? If you want to see what the coordinates are at a certain point, that's what the free cursor (X button) is for.

gamerboy1995 · Oct 9, 2015

videogame57 said:
Algebraic Notation using peasant.
Learn RPN, it's faster and better.

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4 dimensional graphs should be possible too.

I'm not part of this very small group of people that uses this really weird version of math = I'm a peasant? Could you please explain that to my calculus professor who has been teaching for 30 years and has probably only ever had one student ever turn in a paper where they say "3 3 +" instead of "3+3"? Or maybe you could explain it to the people who make actual graphing calculators like the TI-84, because I'm pretty sure they would also tell you that you did something wrong if you wrote "x^2" as "x 2 ^".
Could you please explain how writing numbers in a different order is "better" in any way other than making you feel smarter?
I was just saying that almost everyone who needs a graphing calculator has probably been trained with algebraic notation, so it would make a lot more sense if they could input it like that rather than trying to learn some obscure notation just for this one app?

Also, I'd love to see what you think a 4 dimensional graph looks like, seeing as our universe is only 3 dimensional.

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flarn2006 said:
Multiple graphs are already a thing; I added that in the new version I posted last night.

Maybe when you post new versions, you could post some kind of notice on here so the people can just click the watch button on this thread to see any news about it rather than needing to remember to check Github?

flarn2006 · Oct 9, 2015

gamerboy1995 said:
Could you please explain that to my calculus professor who has been teaching for 30 years and has probably only ever had one student ever turn in a paper where they say "3 3 +" instead of "3+3"? Or maybe you could explain it to the people who make actual graphing calculators like the TI-84, because I'm pretty sure they would also tell you that you did something wrong if you wrote "x^2" as "x 2 ^".

I guess you've never used an HP graphing calculator. To be fair though, the newer ones do support algebraic notation as well.

gamerboy1995 said:
Maybe when you post new versions, you could post some kind of notice on here so the people can just click the watch button on this thread to see any news about it rather than needing to remember to check Github?

That's a good idea; I'll do that next time.

RikuKawai · Oct 10, 2015

gamerboy1995 said:
I'm not part of this very small group of people that uses this really weird version of math = I'm a peasant? Could you please explain that to my calculus professor who has been teaching for 30 years and has probably only ever had one student ever turn in a paper where they say "3 3 +" instead of "3+3"? Or maybe you could explain it to the people who make actual graphing calculators like the TI-84, because I'm pretty sure they would also tell you that you did something wrong if you wrote "x^2" as "x 2 ^".
Could you please explain how writing numbers in a different order is "better" in any way other than making you feel smarter?
I was just saying that almost everyone who needs a graphing calculator has probably been trained with algebraic notation, so it would make a lot more sense if they could input it like that rather than trying to learn some obscure notation just for this one app?

Also, I'd love to see what you think a 4 dimensional graph looks like, seeing as our universe is only 3 dimensional.

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Maybe when you post new versions, you could post some kind of notice on here so the people can just click the watch button on this thread to see any news about it rather than needing to remember to check Github?

The peasant thing was a PCMR joke.
You don't write in RPN, you just enter into the calculator in it.
It's just faster to enter and you don't have to worry about brackets because you handle order of operations yourself. RPN is basically postfix on a stack.

Also, https://en.wikipedia.org/wiki/Four-dimensional_space

vayanui8 · Oct 10, 2015

Pedeadstrian said:
I would imagine your school is the exception. The high school I went to don't even allow you to have mp3 players, regardless of whether or not you're in class. Of course, I still did. I knew how to hide the wires in my hoodie.

With the rise of smartphones they've slowly become much more lenient. Eventually most school just gave in and let people use electronics during breaks over the past few years. They still don't allow them in class, but in my experience most of the teachers don't care that much and the ones that do can easily be fooled by a stack of books

UltiNaruto · Oct 10, 2015

Well when we had to go on computer room. I was using my own laptop since their computer were pretty slow and the teacher would always let me use it

flarn2006 · Oct 11, 2015

Version 1.2 is now available at the Github releases page. I've added the "snap to units" feature that videogame57 requested.

Xen0 · Oct 11, 2015

Is there a way to move parables on the y axis? For example x2^+2 doesn't work. Don't know if this is correct so, at least in Germany we learn it this way.

Thanks in advance

flarn2006 · Oct 11, 2015

Xen0 said:
Is there a way to move parables on the y axis? For example x2^+2 doesn't work. Don't know if this is correct so, at least in Germany we learn it this way.

Thanks in advance

You mean x2^2+?

Xen0 · Oct 11, 2015

flarn2006 said:
You mean x2^2+?

Yeah that worked, thanks

(Hopefully) last question: how can I move it on the x axis? Don´t know this American(?) writting system, sry^^

flarn2006 · Oct 12, 2015

Xen0 said:
Yeah that worked, thanks
(Hopefully) last question: how can I move it on the x axis? Don´t know this American(?) writting system, sry^^

It's not an American thing (in fact it's called RPN, and the P stands for Polish); it's just a way of writing equations that's better for entering them into calculators. It's mainly used on HP calculators.

And to move it on the X axis, you just put the number of units you want to move, and then + (to move left) or - (to move right), after every "x".

flarn2006 · Oct 20, 2015

Version 1.3 is now available! See the releases page on Github for download links. I've added some new functions, and also a useful "slider" function for adjustable variables.

Ericzander · Oct 30, 2015

FINALLY I can bring my 3ds to class.

"I'm not playing Zelda! I'm graphing!"

GalladeGuy · Nov 22, 2015

Is this still being worked on?

ComeTurismO · Nov 22, 2015

I'm actually going to use this next semester.

flarn2006 · Dec 3, 2016

Bumping this thread since there's a new update with a requested feature: pressing A lets you enter an equation the traditional way.

Lotoonlink · Dec 3, 2016

flarn2006 said:
Bumping this thread since there's a new update with a requested feature: pressing A lets you enter an equation the traditional way.

Why did you suddenly update it now? Just got bored and needed something to work on?

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Update idea I just got: add 3d viewing (if you havent already)

flarn2006 · Dec 3, 2016

Lotoonlink said:
Why did you suddenly update it now? Just got bored and needed something to work on?

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Update idea I just got: add 3d viewing (if you havent already)

Mainly because the software keyboard was added to ctrulib (though that was a while ago), also I just got it to compile again after having trouble for a while and I found a library for equation parsing that will compile for the 3DS.

What do you mean by 3D viewing? Like 3D graphing? I would like to add that eventually because of the 3D display, but I'm not exactly sure how to best do it yet.

Lotoonlink · Dec 4, 2016

flarn2006 said:
Mainly because the software keyboard was added to ctrulib (though that was a while ago), also I just got it to compile again after having trouble for a while and I found a library for equation parsing that will compile for the 3DS.

What do you mean by 3D viewing? Like 3D graphing? I would like to add that eventually because of the 3D display, but I'm not exactly sure how to best do it yet.

What I mean is that if you eventually have the option to graph multiple lines at once, you can have each line going at a different 3d depth. Even if you don't have multiple lines, adding 3d to the numbers on the top screen and other data shown will make this cooler!
Edit: just looked at the update history, nvm multile lines is already a thing. So, you should add 3d to it!

Homebrew [Release] Graphing Calculator

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