Comments on: SciCal

By: Greg Winig

Greg Winig — Thu, 05 Nov 2009 22:13:04 +0000

I FOUND AN ERROR. 26 FACTORIAL COMES OUT WAY WRONG!

By: Quan

Quan — Wed, 04 Nov 2009 23:28:13 +0000

The pro version give u more function to use and an equation solver to solve equations.

By: Greg Winig

Greg Winig — Wed, 04 Nov 2009 21:02:27 +0000

What is the difference between the pro and lite versions of sci cal?

By: Don Dunfee

Don Dunfee — Wed, 02 Sep 2009 14:43:40 +0000

Factorial function needs to be checked.
Try a large number factorial, then multiply by
the next number, then the next number, using just
the multiplication key. Results are reasonable.
Start with 16!, then multiply the result by 17, etc.
Get to 19! Now try the function. Result is off.

By: IPHONEWATCHERS.COM » Blog Archive » SciCal Lite - Scientific Calculator

Tue, 02 Jun 2009 09:37:27 +0000

[...] ez.scical@gmail.com Updated:Fixed a bug occurred when the expression is too long. Website: http://quanlam.wordpress.com/2008/12/13/scical/ Support Website: [...]

By: meeble

meeble — Thu, 05 Mar 2009 21:00:00 +0000

sweet, the latest version fixed a bug i guess SciCal was having with parenthesis!

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By: quanlam

quanlam — Tue, 10 Feb 2009 07:41:12 +0000

(1 + AER)^1/m-1 by convention will be understand as ((1+ AER)^1)/m
and the result will be different to (1 + AER)^(1/m)

About ((1-(1+0.05)^-5)/0.05)*100 I will try to find the problem.

Thank you for your feedback.

By: Dion

Dion — Mon, 09 Feb 2009 01:54:41 +0000

For those using SciCalc fr financial calculations beware it is important to place brackets around exponents.

Example:

Annual Equivalent Interest Rate (AER) = (1 + r)^m-1

where:

r = periodic rate
m = number of periods each year

can be rearranged to find r if given the AER.

If, say, AER = 5% and there are 2 (six monthly) payments made, then:

r = (1 + AER)^1/m-1

In SciCalc it is important to express this as:

r = (1 + AER)^(1/m)-1

or for this example:

(1+0.05)^(1/2)-1 = 0.02469507659….. (i.e. 2.47% of the principle every six months)

The expression stated as:

1+0.05)^1/2-1 = -0.475 is wrong.

By: Dion

Dion — Mon, 09 Feb 2009 01:19:21 +0000

While I’m at it – a couple of wish list items:

1) Remembering past calculations from one session of use to another.

2) At least three memory locations for storage of constants or parts of previous calculations (memory locations also stored between sessions).

3) An ability to email the results of calculations (in absence of a clipboard function on the iPhone or any other convenient form of calculation export).

Ciao