Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

Re: [Phys-L] Help! data analysis and display (graphing) apps.


On 2012, Sep 02, , at 20:40, John Denker wrote:

On 09/02/2012 10:05 AM, Bernard Cleyet wrote:

I must input data multiple columns thousands of rows collected from,
for example, a photogate, then manipulate (average, find adjacent
differences, various algebraic functions, etc.) and display.

That's an important clarification of the request.

cut

Unfortunately, my "clarification" was grossly incomplete. R would do it, except it appears designed for statisticians. I need to fit to the data, for examples" y=a*exp.(-b*x)* cos(c*t+d); y = a /(1+b*x), or y= a*(1-b*x), and more.

What I want is essentially a spread sheet w/ NLLS fit (as many as 6? parameters) capable. Origin would do except it isn't Apple platform.

I think I'll necessarily continue w/ Kaleidagraph, always saving the data before I execute any plots (that's when it crashes).


bc


p.s. Here's an example of what I've done w/ Kaleidagraph:


http://www.cleyet.org/Pendula,%20Horological%20and%20Otherwise/HSN/HSN%20published%20articles/PDFs/Q%20of%20a%20%22grand%20mother%22%20clock's%20pendulum.pdf