Comments for MATLAB Recipes for Earth Sciences
http://mres.uni-potsdam.de
Martin H. Trauth, University of Potsdam, GermanyWed, 21 Jun 2017 08:27:05 +0000hourly1https://wordpress.org/?v=4.8Comment on All about the Books by Martin H. Trauth
http://mres.uni-potsdam.de/index.php/2017/01/31/199/#comment-26
Wed, 21 Jun 2017 08:27:05 +0000http://mres.uni-potsdam.de/?p=199#comment-26Thanks very much for this very nice comment! The Lego practical was indeed a great success and we will continue to expand it in the next semester. We have thought to use Raspberry Pie, for which there is also a MATLAB hardware support, but had not made it for time reasons.
]]>Comment on All about the Books by garner
http://mres.uni-potsdam.de/index.php/2017/01/31/199/#comment-25
Tue, 20 Jun 2017 19:24:52 +0000http://mres.uni-potsdam.de/?p=199#comment-25Hi, Professor Trauth!
MRES has been a helpful book for me, I like the way that the book was written. Today, I found this blog and I have seen the Lego Mindstorms devices… great! Have you thought to use Arduino in order to develop other devices?
Congratulations on your books and this blog!
]]>Comment on Detecting Change Points in Time Series with MATLAB by derler
http://mres.uni-potsdam.de/index.php/2017/04/20/detecting-change-points-in-time-series-with-matlab/#comment-15
Thu, 18 May 2017 23:15:33 +0000http://mres.uni-potsdam.de/?p=1600#comment-15Great, thanks. And I realised the script was in the extra material from the book, so even better!
]]>Comment on Detecting Change Points in Time Series with MATLAB by Martin H. Trauth
http://mres.uni-potsdam.de/index.php/2017/04/20/detecting-change-points-in-time-series-with-matlab/#comment-14
Thu, 18 May 2017 08:41:53 +0000http://mres.uni-potsdam.de/?p=1600#comment-14Hi Dirk,
very good question! If you are using findchangepts in MATLAB you get, together with the change point locations, the residual error of the signal against the modeled changes. Using findchangepts without the output displays the time series with the change points and the total residual error that you can use to test the model for its quality. As you know from reading the docs of findchangepts the model of course depends on the number of change points you select. I also included the two references provided in the docs of the function for further information.
The function I created for the 2009 paper uses the test statistic of the Mann-Whitney test to find transitions in the mean and the Ansari-Bradley test (not shown here but it’s in the MRES book) to find transitions in the standard deviation. If you have Gaussian data you can also use the t-test and F-test to do the same. And then you have the output of the test to calculate the significance of the result, depending on the size of the sliding window you choose.
Martin
]]>Comment on Detecting Change Points in Time Series with MATLAB by derler
http://mres.uni-potsdam.de/index.php/2017/04/20/detecting-change-points-in-time-series-with-matlab/#comment-13
Thu, 18 May 2017 05:27:41 +0000http://mres.uni-potsdam.de/?p=1600#comment-13Hi Martin,
How can you determine if the observed change point in a time-series is significant. For instance I am using findchangepts in Matlab to detect changes in coral skeleton parameters, and while I can pick up change points within individual parameters, how can I determine if these changes are significant (outside of the confidence limits of the data).
Thanks
Dirk
]]>Comment on The MATLAB/LEGO MINDSTORMS Environmental Remote Sensing Lab Started Today by Martin H. Trauth
http://mres.uni-potsdam.de/index.php/2017/04/21/the-matlablego-mindstorms-environmental-remote-sensing-lab-started-today/#comment-9
Sat, 29 Apr 2017 17:10:45 +0000http://mres.uni-potsdam.de/?p=1624#comment-9Many thanks, Allison, and congratulations for posting the very first comment on the blog! The first MATLAB/LEGO day indeed was a great success and we obviously successfully replaced the boring programming exercises of the previous years by something more fascinating! After three hours a number of MATLAB-programmed LEGO MINDSTORMS vehicles, some of which were nicely decorated such as the one shown on the image, were cruising through the seminar room.
]]>Comment on The MATLAB/LEGO MINDSTORMS Environmental Remote Sensing Lab Started Today by allison.sueyi
http://mres.uni-potsdam.de/index.php/2017/04/21/the-matlablego-mindstorms-environmental-remote-sensing-lab-started-today/#comment-8
Sat, 29 Apr 2017 16:58:38 +0000http://mres.uni-potsdam.de/?p=1624#comment-8Great first task! The pictures you sent look like the students are really enjoying themselves and learning lots!
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