eprload saves field as 1x2 cell v. 6.0.0-dev.19 from .spc file (with several spectra in it)

[davnie]

I use a Bruker EMX with Bruker WinEPR Aquisition for in-situ measurements. I record and save e.g. 300 spectra in one *.spc file. I use EasySpin 6.0.0-dev.19 (2019-12-10) with Matlab R2017a.

When using eprload in the stable version I would get one vector for the field (1xnpoints double) containing the one field that was scanned for all the spectra in the file.
When I use eprload in this version the field is saved as a 1x2 cell with b{1,1}= field and b{1,2}= a vector counting from 0 to nspec-1.

Example of code here:

Code: Select all

[b, scan, pars] = eprload('insitu_scan.spc');

In the Bruker software a number is displayed when recording that shows the number of saved spectra. I assume that it this number that is saved for each scan and shown in b{1,2}.

I am not sure if this change is intentional, for me it is a mild inconvenience (have to update all old scripts before running them), so I thought I would let you know.

[Stefan Stoll]

This is a non-intentional change. Please post your data file so we can track down the bug.

[davnie]

Hi Stefan,
Thanks for your great teaching in Brno.
I have tried to attach the scan.par and scan.spc as a zip file, The files contain 200 spectra. The first 131 are recorded spectra the last ones are empty (zeroes). The zip file is 807 KB.
I get an error saying

Sorry, the board attachment quota has been reached.

BR
David.

[Stefan Stoll]

We adjusted the attachment settings. Try again.

[davnie]

Thanks, it seems to work now. As mentioned it contains 200 spectra, only 131 is recorded the rest are zeroes.

Let me know if you need anything else.

[Stefan Stoll]

This is actually correct behavior, both in 5.2.27 and in 6.0.0-dev, and nothing has changed in this regard between the two versions.

When you have a 2D set of spectra, the first output argument contains both axes - in your case the magnetic field in b{1} and the number of the spectrum in b{2}. See the documentation of eprload.

[davnie]

I am sorry. You are absolutely right.