tgspcinfo - Return information about SPC file

Syntax

InfoStruct = tgspcinfo(File)

Description

InfoStruct = tgspcinfo(File) returns a MATLAB structure containing summary information about a Galactic SPC file from Thermo Scientific^®.

Input Arguments

File

String specifying a file name or path and file name of an SPC file. If you specify only a file name, that file must be on the MATLAB search path or in the current folder.

Output Arguments

InfoStruct

MATLAB structure containing the following fields:

Field Description

Filename Name of the SPC file.

FileSize Size of the SPC file in bytes.

ExperimentType Experimental technique used to create the data.

NumDataPoints Number of data points (y data values) in the SPC file.

XFirst First x data value in the SPC file.

XLast Last x data value in the SPC file.

NumScans Number of scans or subfiles in the SPC file.

XLabel Label for the x data values.

YLabel Label for the y data values.

ZLabel Label for the z data values.

CollectionTime Date and time the scans were collected.

CollectionTimeDatenum Date and time the scans were collected in serial date number format. For more information, see datenum.

Resolution Instrument resolution.

SourceInstrument Name or model of the instrument used to collect data.

InterferogramPeakPointNumber Peak point number for interferograms. It is 0 for scans that are not interferograms.

Comment User-provided comments.

CustomAxisUnitLabel User-provided labels for the axis units.

SubScanHeaders Header information for subfiles or scans, including scan index, next scan index, and w data value.

ZValues Vector containing the z data values of all scans in the SPC file.

Examples

The SPC file, sample.spc, used in the following example is not provided with the Bioinformatics Toolbox software. You can download sample files from:

https://ftirsearch.com/default3.htm

Return information about an SPC file:

% Return information about an SPC file named sample.spc
info = tgspcinfo('sample.spc')

Reading header for file: SAMPLE.SPC
File contains 1 scans

info = 

                        Filename: 'SAMPLE.SPC'
                        FileSize: 48380
                  ExperimentType: 'General SPC'
                   NumDataPoints: 12031
                          XFirst: 6.2998e+003
                           XLast: 499.9531
                        NumScans: 1
                          XLabel: 'Wavenumber (cm-1)'
                          YLabel: 'Absorbance'
                          ZLabel: 'Arbitrary'
                  CollectionTime: '08-Mar-1993 15:13:00'
           CollectionTimeDatenum: 7.2800e+005
                      Resolution: '  .00   '
                SourceInstrument: ''
    InterferogramPeakPointNumber: 0
                         Comment: [1x74 char]
             CustomAxisUnitLabel: ''
                  SubScanHeaders: [1x1 struct]
                         ZValues: 0

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