A set of functions can be fitted to the data.

Least square fit procedures can be employed to describe the data by a Polynomial (up to order 10), or Legendre Polynomial (second order, even terms only, a typical angular correlation function). In addition, set of parameterized nonlinear functions (function list) can be fitted to the data using 'curfit'.

Available functions are: [1] [2] Polynomial, [3] Legendre Polynomial [4] Ge Detector efficiency [5] Simple Exponential [6] Chalk River TF Parameterization [7] Rutgers TF Parameterization [8] angfit [9] Connect PointsIf parameters are provided functions can be drawn.

For comparison different data sets
and functions with display attributes can be stored
simultaneously and drawn in the same picture.

Data sets contain a list of x, y and dy [optional
dx] floating point numbers.

In addition input lines starting with certain characters like

# comment line ignored t title x x-label y y-label s signals new data set p # selects different point symbol (#: 1-5)are recognized.

Up to 20 data sets can be stored simultaneously.

r filname

If no filename is provided, data input from keyboard is
expected. A newly typed data set can be saved as
file. If no filename is given, the data are not
saved and cannot be saved without retyping.

Parameter files can be read or written:

'rpar filnam' or 'wpar filnam'

- Program guess if implemented (automatically)
- Typed from keyboard (spar)
- Read from file (rpar)

The options box selects a weighting mode for the data set.

Caution: A dataset for fitting should not exceed 128 members.

Current commands are:

r [name] Read data file pfit [order] polynomial fit of that order lfit Legendre polynomial fit s [angle] (Legendre only) returns the "slope" at given angle cfit curve fit (after selection of function) spar [# value] set function parameter fpar [#] list and fix function parameters rpar [name] read parameter from file wpar [name] write parameter into file fval [x] calculates function value for given x psym [#][ size] select point symbol and optional the point size xscale [min][max][step] set xscale (min,max,step) yscale [min][max][ste]p set yscale (min,max,step) cpscale [id] copy scale settings of other id (to have identical scales) xlabel [text] set xscale label ylabel [text] set yscale label title [text] set top title log y data converted to log mode [#] set weighting mode for fitting xmul [fac] multiply x data ymul [fac] multiply y data d [#] display data set do [#] color overlay display other data set dop [#] color overlay points of other data set dof [#] color overlay function of other data set ps [#][#] make postscript file 'cliograph.ps' pso [#][#] make postscript file overlay two or more picture psop [#] make postscript file overlay points psof [#] make postscript file overlay function set [#] select data set cset[#] current set # nset create new empty data set pset [#] prints set info plset [#] make plotset for use with xmgrace exit quit

Gerfried Kumbartzki Last modified: Tue Jul 6 17:44:36 EDT 2010