There are two Matlab files in this data product:

[Recommended] "CODAP_NA_v2021.mat"
It contains the CODAP data in its entirety. All of the variables are consistent with the Excel, CSV 
and NetCDF formats. We recommend to use this one.

[Not recommended] "CODAP_NA_v2021_G2format.mat"
To make it easier for people who are familiar with the GLODAPv2 format to access part of the data, we 
also generated a Matlab file using the G2 format . Note the G2 formatted file only contains data that are compatible with the G2 format. The "phinsitusp" variable only contains pH that are calculated from DIC, TA and others. 

=== How to open CODAP_NA_v2021.mat: ===

Use the below command to load data out of the file:
load CODAP_NA_v2021;

Type "whos", and you will see 3 variables: 
"CODAP" (a structure array storing all of the data)
"Headers" (header name info)
"Units" (corresponding units)

Type "Headers" and you can find all of the included variables. 

For example, you will find that DIC data are stored as "DIC". You can access the DIC column data by typing: 
DIC = CODAP.DIC;

To get the unit of DIC, use the below command:
Units{Headers == "DIC"};


=== How to open CODAP_NA_v2021_G2format.mat: ===

Use the below command to load data out of the file:
load CODAP_NA_v2021_G2format;

Type "whos", and you will see 3 variables: 
"C1" (a structure array storing all of the data)
"Headers" (header name info)
"Units" (corresponding units)

Type "Headers" and you can find all of the included variables. 

For example, you will find that DIC data are stored as "tco2". You can get the DIC column data by typing: 
DIC = C1.tco2;

To get the unit of DIC, use the below command:
DIC_unit = Units{Headers == "tco2"};