MATLAB Interface for NCAR Data

Access National Center for Atmospheric Research (NCAR) Data from MATLAB

Getting Started with National Center for Atmospheric Research (NCAR) Data in MATLAB®

Description

This interface allows users to access NCAR data directly from MATLAB. Quantitative and climate risk analysts can use the available data to make investment decisions based on climate data and weather patterns.

System Requirements

• MATLAB R2022a or later
• Web services credentials supplied by NCAR: https://rda.ucar.edu/login/
• User are responsible for complying with any terms governing their use of the National Center for Atmospheric Research Data.

Features

Users can access NCAR data directly from MATLAB. NCAR documentation for data set meta data, parameter summaries, summaries, templates, submission requests and request status and data set deletion can be found here:

https://github.com/NCAR/rda-apps-clients

A valid NCAR connection is required for all requests.

Create a NCAR connection.

% Credentials in code
n = ncar("username","password");

% Example of credentials out of code as of R2023a
n = ncar(getenv("username"),getenv("password"));

Get data set metadata information for a specific data set

mdData = metadata(n,"ds083.2");

Get data set parameter summary.

psData = paramsummary(n,"ds083.2");

Get data set summary.

sData = summary(n,"ds083.2");

Get data set control file.

tData = template(n,"ds083.2");;

Submit a data request.

request.dataset="ds083.2";
request.date="202203020000/to/202203051200";
request.param="TMP/R H/ABS V\nlevel=ISBL:850/700/500";
request.oformat="netCDF";
request.nlat=30;
request.slat=-25;
request.wlon=-150;
request.elon=-30;
request.n_groupindex = 2;
requestx.targetdir="/glade/scratch\n";
requestid = submit(n,request);

Check the status of a request.

checkStatus = status(n,requestid);

Download requested data.

Note that there is no API method to programmatically download the data. Users can login to the NCAR site, https://rda.ucar.edu/login/, to access their data requests. From the website, choose User Dashboard and select the Show Requests option to access the requested data.

Delete requested data.

deleteStatus = delete(n,requestid);

License

The license is available in the LICENSE.TXT file in this GitHub repository.

Community Support

MATLAB Central

Copyright 2023 The MathWorks, Inc.