Mass Spectrometry Data with msbackadj

Hello,

Im trying to use the msbackadj function (<http://de.mathworks.com/examples/bioinfo/1636-preprocessing-raw-mass-spectrometry-data#12 Preprocessing Raw Mass Spectrometry Data>). But it doesn't work and I don't know what is the failure.

The plot looks fine and all spectras are mapped, but the msbackadj function doesn't work. Im a beginner and the best help for me with with an good example! :-)

My x-axis (mz) is function and my mass spectrometry data (sample) is in a csv-file, it consists of 200 spectras with 17000 data points.

mz: 17000x1 double

sample: 17000x200 double

if true
  % code

sample = importdata('Daten.csv');

x = [0.0005:0.0005:8.5];

t = x.';

clear x;

mz = (2.5347*(t-0.169).^2);

clear t;

figure(1)

plot(mz, sample(:,:))

grid

xlabel('Masse/Ladung (m/z)');

ylabel('Intensität');

title('Massenspektren');

YB = msbackadj(mz,sample(:,:));

end

Thx for your help!

Kind regards Paul

[Luuk van Oosten]

Hi Paul,

Could you provide your exact error and where it occurs? If you could add a .csv file with your data, that would be very helpful as well, without it I don't know where to start... If you can provide the code in your question in the right make-up, that would also helps a lot!

Tschüs