Plot points software?

[postitlord]

I'm looking for some relatively simple graphing software, but can't find any.

Given a table of points, x and y coordinates,
I can input a list of numbers manually, have points appear on a graph, it can draw a line of best fit, and tell me the lines' slope. I am sure such a freeware/shareware program exists, but am having excedding difficulty finding one. Can anyone recommend anything? Preferably with a simple user interface.

[DiGiTaIErRoR]

You could make your own.

[Guv]

The best software for this is called PSI-Plot, which will do far more than simple curve fitting and/or plotting from a set of XY coordinates. It is a bit expensive, over $100.00 (there is a $50.00 upgrade to 7.01 from earlier versions).

Some of the spread sheet programs can do curve fitting, but I do not think they make graphs.

[DiGiTaIErRoR]

You can emulate a TI calculator.

That'll do what you want.

You can get it for free.

[DavidHooper]

Try www.graphmatica.com though it might not do exactly what you want. You should get in anyway though - it rox!

[postitlord]

I'm somewhat dissappointed. I'd hoped there'd really be simple software out there. Emulation, seems like a last resort...

[krtxmrtz]

I would try to find what you want on ftp servers of universities around the world. Just to name one, this is place I used to go browsing a few years ago with good results:



and take a look under the directory "science". They have a text index file which gives a short description of the files in the directory.

Wish you good luck!

[Guv]

PostitLord

I'm somewhat dissappointed. I'd hoped there'd really be simple software out there. Emulation, seems like a last resort

Unfortuately, plotting and curve fitting are complex enough that there are many possible variations, parameters, et cetera. Anybody who knows enough to write an application will always include more options than any individual user wants.

DavidHooper posted a site where you can obtain a free copy of Graphmatica. I am sure that it will do what you want. I downloaded it, but found it was not as user friendly as PSI-Plot, which I prefer, but which must be paid for.

I would expect a Web search to turn up other software. Perhaps search for Freeware and/or Shareware instead of searching for Plotting software. Once at a site, look for the plotting software.

I use PSI-Plot which is great for plotting from data points. It has a built-in spread sheet and can accept data from Excel. It plot points and do curve fitting. I happen to use it only for Function Plots, which is one of the many options provided. You seem to want only a linear fit to a set of data points, while it is capable of providing higher order fits. I doubt that you will find any software which does not do more than you require.

BTW: Just after the prehistoric era, I enthusiastically described to my father all the amazing capabilities of computers. He replied as follows.

If you have a device or machine that can only perform one function, you turn it on and it starts to do its function. If you have a device that can do two functions, you have to turn it on and then do what is necessary to choose function 1 or function 2. If you have a device that will do many functions, you might not be able to figure out how to get it to do anything.