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webOS Nation Forums > webOS apps and software > webOS developer forums > i-marco apps > Scientific RPN Calculator
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GET IT HERE:
http://www.precentral.net/homebrew-a...rpn-calculator
UPDATED: Posted a new ipk and a new screenshot.
This application and it's sourcecode, images and markup are licensed under the Creative Commons Attribution-Noncommercial-No Derivatives 3.0 license. FULL LICENSE INFORMATION
The sourcecode is freely available here:
http://github.com/TheMarco/Scientifi...or/tree/master
Like the subject says this is a scientific RPN calculator. This is an early release so there will be bugs.
I think the behavior of the app is mostly right but it will take some real RPN calculator users to verify that things are ok. If they aren't please let me know and try to be as detailed as possible in your bug report.
Most functions work except for:
- FRAC / INT
- FIX / SCI and ENG notations
For those who don't know how an RPN calculator works here's some examples:
Where you'd normally enter 1, +, 2, = you now use: '1 ENTER 2 +'
Where you'd normally enter 2 * (2 + 5) = you can now just use: '2 ENTER 2 ENTER 5 + x'
As you can see you don't need parenthesis on an RPN calculator. WIN!
I put a cap on large integer sizes because JS gets wonky when the numbers get too big. I don't know if there are ways around this and I don't know if it really matters to most people.
The package should install on non-rooted pre's using the SDK install method.
This application is still under development. There's room for some more functions. I welcome suggestions!
Things I'm thinking of:
- choose between LCD style display and regular text for those who don't like the LCD
- graphing (for the further future)
- your suggestions?
I have attached two screenshots and of course the package.
The com.palm.app version is experimental! It has vibrate feedback when touching keys. The nl.i-marco one is the 'stable' release.
http://www.precentral.net/homebrew-a...rpn-calculator
UPDATED: Posted a new ipk and a new screenshot.
This application and it's sourcecode, images and markup are licensed under the Creative Commons Attribution-Noncommercial-No Derivatives 3.0 license. FULL LICENSE INFORMATION
The sourcecode is freely available here:
http://github.com/TheMarco/Scientifi...or/tree/master
Like the subject says this is a scientific RPN calculator. This is an early release so there will be bugs.
I think the behavior of the app is mostly right but it will take some real RPN calculator users to verify that things are ok. If they aren't please let me know and try to be as detailed as possible in your bug report.
Most functions work except for:
- FRAC / INT
- FIX / SCI and ENG notations
For those who don't know how an RPN calculator works here's some examples:
Where you'd normally enter 1, +, 2, = you now use: '1 ENTER 2 +'
Where you'd normally enter 2 * (2 + 5) = you can now just use: '2 ENTER 2 ENTER 5 + x'
As you can see you don't need parenthesis on an RPN calculator. WIN!
I put a cap on large integer sizes because JS gets wonky when the numbers get too big. I don't know if there are ways around this and I don't know if it really matters to most people.
The package should install on non-rooted pre's using the SDK install method.
This application is still under development. There's room for some more functions. I welcome suggestions!
Things I'm thinking of:
- choose between LCD style display and regular text for those who don't like the LCD
- graphing (for the further future)
- your suggestions?
I have attached two screenshots and of course the package.
The com.palm.app version is experimental! It has vibrate feedback when touching keys. The nl.i-marco one is the 'stable' release.
Nice, thanks
very nice thanks
This gives me flashbacks to high school physics...
It's great, though. The other homebrew scientific calculator has tiny buttons to try and hit.
and the *&%*ing calculator on the Pre doesn't have a square root button!
I don't need much out of a calculator, but, a square root is kind of a must.
Now, I just have to practice my RPN again...
It's great, though. The other homebrew scientific calculator has tiny buttons to try and hit.
and the *&%*ing calculator on the Pre doesn't have a square root button!
I don't need much out of a calculator, but, a square root is kind of a must.
Now, I just have to practice my RPN again...
Press spacebar when in default calculator, you'll notice your 4 buttons on the right change 
It's entirely possible I knew that. 
I think I remember seeing that here. Fair enough. Rant retracted.
Still love the app,though
I think I remember seeing that here. Fair enough. Rant retracted.
Still love the app,though
Ah, this is good stuff. A couple of points:
- it would be nice if you could use the keyboard to type numbers, +,-,*,/ and hit enter
- it would also be nice if it resized for notifications--at least for the USB notification it did not resize (made it hard to hit the bottom row of buttons)
Excellent!!
- it would be nice if you could use the keyboard to type numbers, +,-,*,/ and hit enter
- it would also be nice if it resized for notifications--at least for the USB notification it did not resize (made it hard to hit the bottom row of buttons)
Excellent!!
looks pretty cool, but what I really miss from the Centro's calculator is the measuremnt conversions. IE Pints to liters, Inches to Centemeters, Cubic feet to Gallons, etc.. Any chance you have one like that in the works?
Im sorry, but im new to this. How do you install it?
WoW!!! This is freaking AWESOME!!!! Keep up the great work!
Originally Posted by frankos72:
looks pretty cool, but what I really miss from the Centro's calculator is the measuremnt conversions. IE Pints to liters, Inches to Centemeters, Cubic feet to Gallons, etc.. Any chance you have one like that in the works?
I agree with this! A calculator with built in conversion is something I would use everyday!looks pretty cool, but what I really miss from the Centro's calculator is the measuremnt conversions. IE Pints to liters, Inches to Centemeters, Cubic feet to Gallons, etc.. Any chance you have one like that in the works?
The conversions idea is excellent. I agree this is super useful. I'll work on it!
This is what we need on the Pre. an HP48 emulator. Maybe it can be ported. I have one on my pocketpc and its great.
Christoph Giesselink Emu48 Page
Christoph Giesselink Emu48 Page
Conversions would be nice, but I usually use a conversion program rather than that function in my current RPN program. But on the other hand I have yet to see a conversion program for the Pre. On the gripping hand though base conversions would be really helpful to me. I work a lot with hexadecimal. But that might require adding more buttons.
Hmmm resizing for notifications is kind of a problem because it really needs the space or everything will get too cramped. Not sure how to deal with that...
@ngc2000 I think writing a HP48 emulator in pure Javascript will be... a little bit hard. Not sure if it can be done at all even
Now the conversions... I'm kinda wondering whether this shouldn't be a completely different app. Or it could be a different scene in this app. Not sure what would be best really! It may be a better idea to port the Mac OS X converter dashboard app to the Pre. I use that app a lot myself.
@ngc2000 I think writing a HP48 emulator in pure Javascript will be... a little bit hard. Not sure if it can be done at all even
Now the conversions... I'm kinda wondering whether this shouldn't be a completely different app. Or it could be a different scene in this app. Not sure what would be best really! It may be a better idea to port the Mac OS X converter dashboard app to the Pre. I use that app a lot myself.
Originally Posted by mitch2k12:
Im sorry, but im new to this. How do you install it?
+1Im sorry, but im new to this. How do you install it?
Sorry, I just read the "How To Install". BARN!! I reallly could use this but no way do I want to install like that. I for sure would screw something up. 
I guess I'll wait till a regular app comes out. I'm so tired of hearing soon, soon. Lets have them already"
I guess I'll wait till a regular app comes out. I'm so tired of hearing soon, soon. Lets have them already
"Nice job man. Sweet App
Very nice app! Another feature I would find really helpful is a feet/inches option like on my ProjectCalc calculator. If I had that, I could leave it home!
Originally Posted by ngc2000:
This is what we need on the Pre. an HP48 emulator. Maybe it can be ported. I have one on my pocketpc and its great.
Christoph Giesselink Emu48 Page
Have to agree. I'm not a programmer, but if adding some extra display lines and adding the funcitons isn't too bad, the HP48 is the macdaddy of RPN.This is what we need on the Pre. an HP48 emulator. Maybe it can be ported. I have one on my pocketpc and its great.
Christoph Giesselink Emu48 Page
edit: Sorry, posted before I saw the OP's reply. If it's too tough, ah well.
webOS Nation Forums > webOS apps and software > webOS developer forums > i-marco apps > Scientific RPN Calculator
