Abscissa
Abscissa is a program to make high-quality 2D plots from data given in ASCII table format. Data can be created and modified by means of a user-defined formula. A least-squares fitting routine helps to optimise the parameters of this formula to best fit the given data. It is made for scientists.
Main Features:
- ASCII data import and export
- fast reading and plotting
- plotting in many styles
- linear, logarithmic, and date axes
- text objects in the diagram
- x,y error bars
- 4 interpolation methods
- user entered functions f(x)
- flexible functions (parameters, user data, compiled C-code)
- parameter fitting using a Least-Squares Method
- fit of function with several independent coordinates (R^n->R)
- external programs can use Abscissa as plot front-end
- perl scripts can be recorded, played, and saved
- data editing in a spread sheet
- data sorting
- data statistics and correlation
Requirement:
for Mac OS X 10.3 to 10.6 use Abscissa 3.4.1
Content:
last update: Oct 26, 2025 by
R. Brühl ruediger.bruehl@ptb.de