svd_snowfall_test

svd_snowfall_test, a MATLAB program which calls svd_snowfall() to demonstrate the use of the Singular Value Decomposition (SVD) to analyze a set of historical snowfall data.

Licensing:

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Related Data and Programs:

svd_snowfall, a MATLAB library which reads a file containing historical snowfall data and analyzes the data with the Singular Value Decomposition (SVD).

Source code:

• svd_snowfall_test.m, calls all the tests.
• svd_snowfall_test.sh, runs all the tests.
• svd_snowfall.txt, the output file.

• svd_snowfall_test01.m, reads and processes the snowfall data.
• svd_snowfall_test02.m, computes and plots the singular values.
• svd_snowfall_test03.m, computes and displays the rank 1 through rank 5 approximants to the 2010 snowfall data.
• svd_snowfall_test04.m, displays the first six U modes in the data.
• svd_snowfall_test05.m, displays the first six V modes in the data.
• rank_one_approximants.png, a plot of the rank 1 through rank 5 approximants to the 2010 snowfall.
• singular_values.png, a plot of the singular values.
• snowfall.txt, the snowfall data.
• u_modes.png, a plot of the first 6 U modes = monthly snowfall patterns over a year.
• v_modes.png, a plot of the first 6 V modes = variation over 1890-2010 of snowfall in a given month.