Rank: 487 based on 166 downloads (last 30 days) and 14 files submitted
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Other platforms include: Objective-C, .NET, Python, SQL.

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Files Posted by Jeff View all
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24 Sep 2012 Screenshot Mann-Kendall Tau-b with Sen's Method (enhanced) A non-parametric trend test including Sen's slope method using Mann-Kendall Tau-b technique Author: Jeff Burkey seasonally adjustment, hydrology, trend test, monotonic trend, tau b, mannkendall 37 26
  • 4.58824
4.6 | 20 ratings
18 Jun 2012 Screenshot LOWESS, Locally Weighted Scatterplot Smoothing for linear and non-linear data (enhanced) LOWESS, a robust regression like LOWESS allows detecton of a trend otherwise with too much variance Author: Jeff Burkey weighted regression, robust regression, regression, line fit, bisquare, statistics 34 8
  • 5.0
5.0 | 6 ratings
25 Apr 2012 stormevents - extract out storm events based on user supplied thresholds Using hydrograph separation techniques, storms are extracted from a time series. Author: Jeff Burkey hydrology, hydrographs, storms, storm events, hydrgraph separation 5 0
25 Apr 2012 Screenshot Hydrograph Separation using HYDSEP Separates base and storm flows using HYDSEP local minimum method. Author: Jeff Burkey hydrology, hydrograph separation, storm flows, base flows 9 0
21 Feb 2012 Seasonal Kendall Test with Slope for Serial Dependent Data Seasonal trends using tau-a,b and seasonal slope with intervals, accounts for serial dependence. Author: Jeff Burkey mannkendall, probability, trends, seasonal kendall test, trend test, statistics 9 4
Comments and Ratings by Jeff View all
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15 Jun 2012 LOWESS, Locally Weighted Scatterplot Smoothing for linear and non-linear data (enhanced) LOWESS, a robust regression like LOWESS allows detecton of a trend otherwise with too much variance Author: Jeff Burkey

If one truly measures zero, what would be the expected response? A constant? I can see how that may pose a problem, but what is the question imposed on the data? This is a good question. I did not consider measuring zero. Give me a few days to revisit and have a response. - Jeff
13 Apr 2012 Seasonal Kendall Test with Slope for Serial Dependent Data Seasonal trends using tau-a,b and seasonal slope with intervals, accounts for serial dependence. Author: Jeff Burkey

Rita,
It certainly has potential. But whether it can or not reallyh depends on what you're trying to do. As you can imagine statistics is all about semantics. Seasonality can have different meanings. My code will perform a trend analysis on a time series. how you set up your data for seasons is dependant on what question you're trying to answer. I also wrote a Kendall seasonal program, but again you need to be very clear on what you want a season to mean. I would read the comments in the files to get a better understanding.
23 Jul 2011 Mann-Kendall Tau-b with Sen's Method (enhanced) A non-parametric trend test including Sen's slope method using Mann-Kendall Tau-b technique Author: Jeff Burkey

Arvind,
I'm guessing you're using an older version of matlab that does not accept the tilda '~'. Try replacing them with a variable.
- Jeff
18 Oct 2010 Summarizes data using a sliding window without loops This function is extremely fast calculating a sum, mean, etc, using no loops. Author: Jeff Burkey

Well, I swear when I typed in conv I got an undefined function, but I do it again and it's there. Magic!! Thanks John.

Interestingly, when I type conv in the help search, it doesn't come up but a whole bunch of convert 's nothing convolution which lead to conv. Once I found conv in the help it shows up now.

18 Oct 2010 Summarizes data using a sliding window without loops This function is extremely fast calculating a sum, mean, etc, using no loops. Author: Jeff Burkey

Thanks Cris. I've never even heard of conv before. Going online at mathworks, it's not redialy apparant what toolbox that function is in...maybe Signal Processing? I can find the function documentation but I can't tell what toolbox it's in. Thus, while I would like to use your solution, it's not available to me. I only have Statistical Toolbox and conv is not in that toolbox. At least I still have some utility to people with conv! Thanks for the input. I'm sure these dialogues are very helpful for all interested.
Comments and Ratings on Jeff's Files View all
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10 Apr 2013 Mann-Kendall Tau-b with Sen's Method (enhanced) A non-parametric trend test including Sen's slope method using Mann-Kendall Tau-b technique Author: Jeff Burkey Chris

18 Jan 2013 Sens Trend Test with seasonallity present, non-parametric A monotonic trend test that has good power with seasonal data. Requires no missing data. Author: Jeff Burkey Margaritidis, athanasios

I solve my problem Mr. Burkey. This function works well!! I just import my data as csv files!!!

Greetings from Greece
20 Nov 2012 Seasonal Kendall Test with Slope for Serial Dependent Data Seasonal trends using tau-a,b and seasonal slope with intervals, accounts for serial dependence. Author: Jeff Burkey zegre, nicolas

Jeff,
thank you for all that you contribute to hydro analyses, greatly appreciated! Is there significant trend in the example data that you provide for sktt?
25 Oct 2012 Mann-Kendall Tau-b with Sen's Method (enhanced) A non-parametric trend test including Sen's slope method using Mann-Kendall Tau-b technique Author: Jeff Burkey Patrick

25 Oct 2012 Mann-Kendall Tau-b with Sen's Method (enhanced) A non-parametric trend test including Sen's slope method using Mann-Kendall Tau-b technique Author: Jeff Burkey Patrick

works fine and is well documented, thus nothing to complain about

Top Tags Applied by Jeff
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statistics, hydrology, probability, mannkendall, trends
Files Tagged by Jeff View all
  • 1 - 5 of
  • 14
Updated   File Tags Downloads
(last 30 days) 		Comments Rating
24 Sep 2012 Screenshot Mann-Kendall Tau-b with Sen's Method (enhanced) A non-parametric trend test including Sen's slope method using Mann-Kendall Tau-b technique Author: Jeff Burkey seasonally adjustment, hydrology, trend test, monotonic trend, tau b, mannkendall 37 26
  • 4.58824
4.6 | 20 ratings
18 Jun 2012 Screenshot LOWESS, Locally Weighted Scatterplot Smoothing for linear and non-linear data (enhanced) LOWESS, a robust regression like LOWESS allows detecton of a trend otherwise with too much variance Author: Jeff Burkey weighted regression, robust regression, regression, line fit, bisquare, statistics 34 8
  • 5.0
5.0 | 6 ratings
25 Apr 2012 stormevents - extract out storm events based on user supplied thresholds Using hydrograph separation techniques, storms are extracted from a time series. Author: Jeff Burkey hydrology, hydrographs, storms, storm events, hydrgraph separation 5 0
25 Apr 2012 Screenshot Hydrograph Separation using HYDSEP Separates base and storm flows using HYDSEP local minimum method. Author: Jeff Burkey hydrology, hydrograph separation, storm flows, base flows 9 0
21 Feb 2012 Seasonal Kendall Test with Slope for Serial Dependent Data Seasonal trends using tau-a,b and seasonal slope with intervals, accounts for serial dependence. Author: Jeff Burkey mannkendall, probability, trends, seasonal kendall test, trend test, statistics 9 4

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