View Full Version : TI replacement calculator - specifically, need standard deviation
student
09-19-2005, 02:30 AM
I'm looking for a feature rich replacement for TI calculators. If I can't get that I'm at the least looking for a calculator that can do sample standard deviation, population standard deviation, sum of values, and sum of squares of values. TI calculators still cost around 100 bucks after tax so price isn't really a problem. I can't imagine a bit of PPC software costing that much.
Cheers :D
There a many good scientific calculator, two of my favorites are:
Math Tablet http://www.statsnow.net/mathtablet
Higher level math than most and is programmable. Has a Matlab"ish" interface and is very customizable.
and
SpaceTime http://www.spacetimemobile.com
Very nice 3D plotting. Not programmable but has many good canned routines.
CRM
Gremmie
09-19-2005, 07:00 PM
Look for a TI emulator, I know there are emulators for the popular HP calculators, the finance version (15c I believe) should work.
delfuhd
09-19-2005, 07:16 PM
http://www.freewareppc.com/calculator/virtualtipocketemulator.shtml
There are other ones like that, and I'm not sure about htat particular one but usually you need the ROM image fromt eh calculator. I use it every day
http://www.freewareppc.com/calculator/virtualtipocketemulator.shtml
There are other ones like that, and I'm not sure about htat particular one but usually you need the ROM image fromt eh calculator. I use it every day
I have found VTI to be very buggy. Do you know where I can find the others you mentioned?
www.mobilevoodoo.com mentions working on one, but the last page update was a year ago and he hasn't replied to my emails so I assume it's a dead project (too bad, looks like he does nice work).
As someone mentioned above, I also highly recommend MathTablet. I'm sure you could easily program any functions you need.
Jorgen
09-21-2005, 08:54 PM
The HP-48 / 49 emulators do exist for PCs, Palms and PPCs; I have had it running on a PC and a Palm Tungsten T, but never tried it on my PPCs.
You can get one for the Pocklet-PC (and the PC) from here http://www.hpcalc.org/hp49/pc/emulators/ (search for "PPC"). You also need a ROM image either from the same site or HP (HP released them some time ago for this use). The ROM I use for the PC is called 49Gp_50.bin (search for it in Google) and I assume this will also work on a PPC.
You can find 48 adn 49 manuals on the same site or here http://www.educalc.net/149032.page
Jorgen
Hi guys,
If you doing simple statistics then Pocket Excel might work very well. It has some inbuilt statistics formulas but its strength is in what I would call "pseudo vectorisation" :D ie ability to perform an operation on the each element of the vector. For example you might have columns for x & y values then have columns like x(i)^2, (x(i) - mean(x))^2, y(i)^2, (y(i)-mean(y))^2 etc. You will need to setup an initial spreadsheet but after that you just have to re-use it. If you are careful than you may do this on desktop PC and then copy it to PPC (take care because most of the desktop formulas are not supported).
Another great advantage of Excel is that you can quickly see the numbers you entered and correct mistakes. You can hide the formulas by either putting them on the separate sheet or hiding the rows or column they are in.
Oleg
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