d files (well, folders actually) and choose those that you want to convert to AIA format. Then, choose a folder containing the Agilent. This is a common format used to move GC-MS data between different software regimes. The Agilent software can batch convert the Agilent format data to ANDI/AIA/ NetCDF interchange format. Step 1:Ĭonvert GC-MS data files to ANDI/AIA/NetCDF interchange format I could describe all the different routes I tried, but I suspect that just giving the method I have found that works best will be more useful for people who, like me, just want to be able to pull GCMS data from CDF files. The aim was to reduce some of the burden on the technicians who were having to format the reports by hand – extremely dull and time consuming. I was trying to write a tool that we could use to batch process GC-MS data from a teaching laboratory to present grouped reports to the students, in a format that matched a similar output from the GC-FID systems we also have. Ī probable cause for the error in MATLAB CDFLIB functions comes from the TT2000 datatype that is used for the epoch variable in MAVEN files.After spending a few days writing a tool to read GC-MS data files into LabVIEW, I thought I’d publish what I found – so others do not have to repeat my mistakes! The steps I describe here will also be useful to people who are using languages other than LabVIEW’s G to understand how to get GC-MS data from netCDF files. With SPDF version of CDF routines you would get the correct output: > mvninfo = spdfcdfinfo('mvn_lpw_l2_lpnt_20180814_v03_r02.cdf')įilename: 'mvn_lpw_l2_lpnt_20180814_v03_r02.cdf'Īnd spdfcdfread returns the data as a MATLAB array > mvndata = spdfcdfread('mvn_lpw_l2_lpnt_20180814_v03_r02.cdf') With MATLAB provided CDFLIB running on MATLAB 2017a (9.2.0) you get > cdfinfo('mvn_lpw_l2_lpnt_20180814_v03_r02.cdf')

The version of cdflib that comes with MATLAB does not support some of the features used in MAVEN files. The Installation instructions are fairly straightforward and there is little that can be added to it. This version of the library is provided for free and can be downloaded directly from SPDF. To read the data from NASA Space Physics Data Facility (SPDF) you are encouraged to use the CDF handling library from SPDF.

Opening cdf files matlab