FileReader.ReadSpectrumEx

Remarks

With a scan number, that scan is read, or an empty spectrum if it does not pass the filter. With -1, the next spectrum that passes the filter is read, and an empty spectrum, with ScanNumber 0, marks the end of the file.

Only Thermo RAW files provide the extended data. Other formats leave it at zero.

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Syntax

Syntax	Description
ReadSpectrumEx(string fileName = “”, int scanNumber = -1, bool centroid = true)	Reads a spectrum with the extended per-peak data where the format provides it, opening the file first if it is not the current one.

Parameters

Name	Type	Description
fileName	string	The file to read from, or empty for the current file.
scanNumber	int	The scan number, or -1 for the next spectrum.
centroid	bool	The preferred peak type. Not guaranteed; check the Spectrum.Centroid property.

Returns

Type	Description
SpectrumEx	The spectrum, or an empty one if it could not be read.

Exceptions

Exception	Condition
SpectrumFileOpenException	A new file could not be opened.

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Example

using Nova.Data;
using Nova.Io.Read;

FileReader reader = new FileReader(MSFilter.MS1);

// The first call names the file; later calls keep reading it.
SpectrumEx spectrum = reader.ReadSpectrumEx("DDA.raw");
while (spectrum.ScanNumber > 0)
{
  Console.WriteLine(spectrum.ScanNumber + ": " + spectrum.Count + " peaks");
  spectrum = reader.ReadSpectrumEx();
}