proteomics and mass spectrometry

Question

[qudrat]

Hello, Can somebody tell me how to find total number of spectra in an mzml file? How to know the number of unassigned spectra remained in a file after tandem run was over?

Answer 1

[mobiusklein]

The total number of scans should be listed in the count attribute of the <spectrumList> element of an mzML file. A shell approach to finding this is to run grep "<spectrum " path/to/mzml | wc -l

Without knowing the program you used to assign spectra, answering the second part of your question is much harder. Can you name the program you used, please?