spec - Local Sector 7 web page

The Index FileIndexing a long ASCII data file to find at what byte offset each scan begins takestime. Once scans.4 has indexed a file, it saves the index information in a binary-formatindex file. The name of the index file is formed by appending .I to the originaldata-file name. As long as the index file is more recent than the data file, scans.4 willtake the index information from the index file.Nor malization and Error BarsThe values returned as error bars are those due to counting statistics (the squareroot of the number of counts). When the counts are derived from the algebraic combinationof detector, background and monitor counts, the error bars are calculatedusing the appropriate propagation of errors formalism. 1ContentsA contents program is included in the spec package. The program tries to print summaryscan information from spec’s standard data files. Usage iscontents [ options ] file1 [ file2 ... ]Current options are-o output Name of output file, otherwise standard output is used.-s start Starting number for first scan of first file.-p page Lines per page.-d Send control codes appropriate for DecWriter II.-c Print #C comment lines.1 P. R.Bevington, Data Reduction and Error Analysis for the Physical Sciences, (McGraw-Hill, New York,1969), p. 64.40 USER MANUAL AND TUTORIALS INTERIM WORK-IN-PROGRESS (8/16/01) NOT FOR GENERAL DISTRIBUTION