User Manual
There are many different Matlab commands within Libisis. These include basic commands, such as taking the exponential of a dataset, through to integration and plotting commands. The following is an online user manual for the matlab interface of the Libisis software.
Overview
There are many different object types within Libisis used to store experimental data. Once an object is created, functions exist to manipulate the data contained within. The most common objects for plotting and data manipulation are IXTdataset_1d and IXTdataset_2d objects. IXTrunfile objects contain all raw data from a run.
IXTdataset_1d objects store signal and error information against one dimension (the x axis). Label and titling information is also stored. IXTdataset_2d objects also contain a second dimension (the y axis). All relevant data pertaining to a run can be stored in an IXTrunfile object. The object can be thought of as an array of IXTdataset_2d objects with a lot of additional information.
Data is read into these objects (using methods described below) and can then be manipulated using many different tools and functions described in this documentation.
General Behaviour
Most functions share a general behaviour outlined here
Data Manipulation Functions
Input and Output Functions
getspectra, getspectrum - Read in spectra from IXTraw_file objects or from RAW files
read_ascii, write_ascii - Read or write to text files
read_points, write_points - Read or write to text files, forcing data to be point data
read_hist, write_hist - Read or write to text files, forcing data to be histogram data
Binary Operators
Binary operators such as +, -, *, etc. are used to perform arithmetic operations between datasets and/or numbers
Elementary Functions
Elementary functions act on each signal element identically
Data Manipulation Functions
shift, shift_x, shift_y, shift_xy - Shift data along an independent axis
scale, scale_x, scale_y - Scale one of the independent axes
flip, flip_x, flip_y - Reverse the data in a dataset
Rebin Functions
Three different methods exist for rebinning a function. Rebin will rebin the data into user defined bins. Rebunch will bunch together a user defined number of bins. Regroup rebins data using a minimum binwidth given by the user but insures that the new bins are coincident with the existing bins.
rebin, rebin_x, rebin_y, rebin_xy
rebunch, rebunch_x, rebunch_y, rebunch_xy
regroup, regroup_x, regroup_y, regroup_xy
High Level Functions
deriv1x, deriv2x, deriv1y, deriv2y, deriv1, deriv2 - Takes derivatives of a dataset
integrate_x, integrate_y, integrate_xy, integrate - Integrates a dataset between user defined limits
smooth - Smooths out signal data to avoid small, sharp deviations
interp_x, interp_y, interp - Interpolates data onto a different set of points
unspike - Removes any large spikes from the data
fit - Fitting data to known functions and giving curves of best fit
func_eval - Evaluate a function at the given x and y data points
Special Functions
Special functions are used to transform data between different types.
contract - Turn an array of IXTdataset_2d objects into a single IXTdataset_2d object
expand_d1d, expand_listd1d, expand_d2d, expand_listd2d - Expand single objects into many objects
oned_to_twod - Convert an IXTdataset_1d into an IXTdataset_2d
hist2point, hist2point_x, hist2point_y - Convert between histogram and point data
Graphics
Using Default Properties and Name Tags
Plot Commands
Pre-Emptive Formatting
Retrospective Formatting
lx, ly, lz
linlogbutton, linlogmenu, linx, logx, liny, logy, linz, logz
aspect
dxyz
kf keep_figure, rf release figure
set_plot, set_axes, set_figure
set_legend
Other Commands
sdp, set_default_property, sup, set_user_propety, ra, reset_all, rd, reset_default
gallnt, gallh, check_figure, chkf, get_handle, gh, alias
undop
color_slider
rename
fromplot
User Reference
Information for reference purposes, such as valid linestyles, marker styles etc.