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<blockquote><div class="quotetitle">Quote from <a class="profile-link highlight-admin" href="https://ucphchemometrics.com/forum/profile/jlhdk/">Jesper L Hinrich</a> on January 27, 2023, 8:59 am</div>Hello,

Yes, we have changed how the session information is stored. The information is roughly the same, but store differently.

If you already have a session with imported .CDF files, then you can use "Export Chromatography Data" in the DataTab to export the Data, retention time, mass spectra axis, and sample names. The exported file is a standard MATLAB .mat file.

The exported file can then be modified, in a similar way as for v5.98. Importantly, it should be saved with MATLABs save(...,'-v7.3') function as it allows efficiently accessing subsets of the data. This file can then be imported using the "Import Chromatography Data" in the DataTab.

The new format is similar to the old, but with the chromatographic data called <strong>Data</strong> which is an array of size #samples by #retentiontimepoints by #massees. The <strong>mz</strong> variable is a 1 by #masses vector contains the mass axis. The <strong>rt</strong> variable is a #retentiontimepoints by 1 vector and contains retention time in minutes.

The <strong>PathsAndFilenames</strong> variable is not strictly needed, but then sample names will then be unknown 1,2,3, etc. . It is a cell array of size #samples by 2 with the first column being folder location and the second the file or sample name.

Best,
Jesper

NB. The edits are due to me trying to include screenshots, but that was unsuccessful.</blockquote><br>

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