DATCROP manual

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© ATSAS Team, 2011-2014

Table of Contents

• Manual
  • Introduction
  • Running datcrop
    • Command-line arguments and options
  • datcrop input files
  • datcrop output files
• Example

Manual

The following sections shortly describe how to run DATCROP from the command-line on any of the supported platforms, the required input and the produced output files.

Introduction

DATCROP is a tool for removing data points from the beginning and/or the end of the scattering curve. Primarily it is used for removing noisy data close to the beamstop and excess data at high angles.

Running datcrop

Usage:

$ datcrop <FILE> [OPTIONS]

OPTIONS known by DATCROP are described in next section, the required argument 'FILE' in the section on input files.

Command-line arguments and options

DATCROP requires one command line argument FILE which is a data filename, possibly with relative or absolute path components. Instead of a filename, the FILE argument may be '-' to read data from stdin.

DATCROP recognizes following command-line options:

datcrop input files

DATAFILE must contain three columns: scattering vector, experimental intensity, experimental errors.

datcrop output files

The produced output file contains three columns with cropped data.

Example

$ autorg bsa.dat -f table
File              Rg  stdev  I(0)    stdev  Guinier points   Quality
bsa.dat           3.12   1%  65.1       0%   30-122 ( 93)    88%

$ datcrop bsa.dat --first 29 --smax 2.5 -o bsa_cropped.dat

Here we start with the first point of the Guinier region and keep angles only up to 2.5 nm^-1.