Dark Cowherd <[EMAIL PROTECTED]> wrote:
> http://www.ucalc.com/mathparser/index.html
>
> There is a great library called UCALC which allows you to set up an
> expression and evaluate it
> for e.g. you an define an expression by calling a function in UCALC
> then call it with various values of x
>
> for e.g. see this page
> http://www.ucalc.com/mathparser/sample6.html
>
> It is very fast. I have used it in VB when there is lot of number
> crunching to be done.
> Is there a Python equivalent.
>
> I looked at numPy and SciPy sites (just skimmed through) did'nt seem
> to have what I wanted.
>
> Any pointers?
Python has 'eval' and 'exec', so you can process at run-time anything
that you can type into script file. However, it will be a bit more
verbose than UCALC, because Python is more general.
If you're looking for scientific calculator, which can be embedded or
scripted, then perhaps you should take a look at
http://home.eol.ca/~parkw/index.html#rpn
It is RPN calculator with full support for <math.h> functions and some
features found in typical programmable scientific calculators.
Eg.
3+4/5-8 --> rpn 4 5 / 3 + 8 - = --> -4.2
x^2+5x-10
--> rpn 'f(x)= dup 5 + x 10 -'
rpn 1 'f(x)' = --> -4
rpn 5 'f(x)' = --> 40
or it can be scripted directly using shell function, like
--> func () {
rpn $1 dup 5 + x 10 - =
}
func 1
func 5
Sum(x^2+5, 1, 10). I assume this is sum of x^2+5, for x=1,2,...,10
--> rpn clear
for i in {1..10}; do
rpn $i x^2 5 + +
done
rpn = --> 435
--
William Park <[EMAIL PROTECTED]>, Toronto, Canada
ThinFlash: Linux thin-client on USB key (flash) drive
http://home.eol.ca/~parkw/thinflash.html
BashDiff: Super Bash shell
http://freshmeat.net/projects/bashdiff/
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