Calculators are not always be used to solve mathematica problems. Handycalc has designed some tricks that might be useful:
All these tricks is some simple input and does not need to launch any other programs.
Currency convert
Try to input as follows:
Notice the first tip has changed to a currency convert. You can press it and get the following result:
handyCalc shows the two currency with two big flag. Simple and clear, isn’t it?
And it also shows the last update date of the currency exchange rate. The currency exchange rate is updated from the ECB: European Central Bank.
If you provide only one currency, handyCalc will open the currency list and let you select from them.
Tip: You can input your currency name (first character or the full name) and handyCalc will search it for you.
In the Currency Converter, you can also update the currency exchange rate from ECB if you are online:
Unit convert
Unit convert is the same as currency convert. Try to input as follows:
And if you provide only one unit, a unit list will be opened to let you select.
You can also goto the Tools menu and press [Unit Converter] and open a full listed unit converter.
Time calculate
There are many formats you can present a time:
- today
- now
- Apr 14, 2008
- Apr 14, 2008 20:00
- Apr 14, 2008 8:00 pm
- 20080414 20:00:00
- 30 years 5 months
- 7 days 10 hours 45 seconds
- 7 days 10 hr 45 sec
combine them with plus or minus.
Statistics
Statistics is a simple function when you plus many numbers together:
Variable & Function preview
The variable & function preview does not require to input anything. Just move your selection (the blink line in your input box) beside the variable or function, and the preview is shown below.
Others
You can input certain word to launch something. For example, input “zoom” and there is a “Zoom tuner” tip shown bellow. You can press it and adjust the zoom.
There are certain functions with certain words you can press:
- Zoom: zoom, zoom in, zoom out, zoom+, zoom-
- Preferences: prefs, preferences
- Document: new, open save, documents
- Currency convert: currency, currency convert, convert currency
- Unit convert: unit, unit convert, Length, Speed, Volume, Mass, weight, Temperature, Pressure, Force, Energy, Power, Time, Luminance, ect.
<- Go to the basic input and calculation
<- Go to the advanced mathematica calculation tutorial (such as solve equations, define functions)
December 3, 2008 at 10:01 am |
Is there any way to add other currencies? In particular, I was trying to convert Peruvian Soles, which I would normally go to xe.com to get rates for.
March 3, 2009 at 10:09 pm |
The statistics calculations are pretty cool but I’m troubled by the fact that with the sample above (329.13+482.34+234+312+124+342+366.36) the standard deviation is listed as 273.107 whereas in fact it should be 111.4954.
March 4, 2009 at 11:14 am |
@gavin hurley:
the bug has already been fixed in the latest handyCalc release. you can get it in the AndroidMarket.
March 10, 2009 at 11:41 am |
where are the files saved?
can i use a text editor to type the formula and use handycalc to give the solution.
by the way awesome program.
March 26, 2009 at 11:43 pm |
now i understand handy calc is able to solve derivatives but is it able to solve intergals?
April 10, 2009 at 8:46 am |
A very good tool.
The next thing, you could add is a way to calculate with matrixes.
May 29, 2009 at 5:34 pm |
This is a great tool. The ability to perform trig and logarithmic calculations is very useful.
I tried to figure out a way to get it to graph a piecewise function the other day and I couldn’t get it. Is there a way?
I even tried the method I used to use on the TI-82s in High School, which is to use:
f(x)=(x+1)/(x<2)
The = 2.
Its not a feature I’d use everyday but the one time I wanted it it sure would have been nice.
Thanks again!
May 29, 2009 at 5:36 pm |
Uh…WP chunked a paragraph thinking it was html.
It should say (operators converted to words…):
The less-than operator evaluates to either 1 or 0 on the calculators, so f becomes undefined when x is greater than or equal to 2.
August 1, 2009 at 8:33 am |
Hi mmin.
Great product!
handyCalc 0.40 on Android 1.5 does not evaluate actual time part if function now is called more than once in a sequence.
Thank you.
September 19, 2009 at 4:10 pm |
Cannot enter an alphabet in HEX input when using unit convert
October 2, 2009 at 4:27 pm |
I have the same issue with hex to decimal conversion. Cannot enter an alphabet for hex.
This is a GREAT app, btw!
October 3, 2009 at 10:18 am |
Hi,
Can anyone tell how to keyin a colon to calculate in the time difference?
Thanks in adv.
November 13, 2009 at 5:15 pm |
A very useful app. I use it almost everyday at the University.
I’ll do a couple suggestions:
- Keyboard: a sound when any key is pressed would be very helpful
- Functions: I miss a factorial key and a binomial calculation.
- Now that you have added more units, a Fundamental Physical Constants section would be nice (elementary charge, gravitational constant, etc).
Thanks in advance.