Re: Number of decimals
"floobydoo2000" <[email protected]>
| Newsgroups | gmane.comp.windows.gui4cli |
|---|---|
| Message-ID | <[email protected]> |
I've investigated this. 6 decimals is it if you use the built in math routines. You can use a windows version of a unix utility called bc (I think that stands for binary calculator). This is a command line utility and allows for arbitrary precision. This seems perfect for you. One thing to watch out for is when taking a number to a non integer power isn't allowed, eg 2^.333 gives an answer of 1. You get around this by using logarithms. i.e. e^{(ln x)/2} is square root of x. e is Euler's constant 2.718281828. In bc it looks like: e(0.5*l(x)).
The square root of 25 this way yields 4.99999999999.... Just ask for more precision than you need and round off. You can set this up in a script file that you can load into bc each time you call it so that in your Gui4cli script to do x^y you would do something like pow(x,y), where pow is a function you've set up in a script that you have bc load.
Mike
--- In [email protected], "Marianne" <marianne976@...> wrote:
>
> Dear Dimitris
>
> Hope is is going well. Just one question.
>
> I am working a lot with statistics and use Gui4Cli for the purpose. I do have one problem and hope you can give me advice.
>
> Gui4cli only gives a value to 6 decimals. For example 2/3 = 0.666667
> Is there a trick that I can get more decimals, in the region of 10 to 16?
>
> In probabilities this is very important. In one specific situation there is a differenc of 0.10 if I work on 6 or 7 decimals. In the one case it gives me a probability of 0.15 instead of 0.25.
>
> Thank you ever so much for all the help.
>
> Kind regards.
>
> Frans.
>
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