Rank: 174 based on 568 downloads (last 30 days) and 15 files submitted
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Travis Wiens

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Company/University
University of Saskatchewan

Personal Profile:

http://homepage.usask.ca/tkw954


 

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Files Posted by Travis Wiens View all
Updated   File Tags Downloads
(last 30 days)
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24 Jun 2013 Screenshot Brewing Calculators A number of functions for brewers. Author: Travis Wiens beer, wine, brewing, homebrew, refractometer, specific gravity 20 0
18 Apr 2013 Screenshot Graph Picker Helps digitize graph data from an image. Author: Travis Wiens gui, digitizing, data import, image 19 1
  • 5.0
5.0 | 1 rating
16 Apr 2013 Screenshot Hydraulic System Comparison Gui Visualizes power losses and utilization for four common types of fluid power systems. Author: Travis Wiens mechanical, engineering, gui, hydraulic, fluid power, efficiency 13 0
11 Feb 2010 Screenshot Radial Basis Function Network Simulates and trains Gaussian and polyharmonic spline radial basis function networks. Author: Travis Wiens radial basis function, radial basis function..., rbf, integral, line integral, polyharmonic spline 175 5
  • 5.0
5.0 | 2 ratings
03 Feb 2010 Screenshot Linear Regression with Errors in X and Y Calculates slope and intercept for linear regression of data with errors in X and Y. Author: Travis Wiens mathematics, measurement, statistics, interpolation, modeling, linear regression 82 4
  • 5.0
5.0 | 3 ratings
Comments and Ratings by Travis Wiens View all
Updated File Comments Rating
22 Sep 2014 Linear Regression with Errors in X and Y Calculates slope and intercept for linear regression of data with errors in X and Y. Author: Travis Wiens

Rainer Boegle: This method is only for a single input.

01 Nov 2009 Complex Optimization of a Recurrent Neural Network Shows how to use the complex method to optimize a black-box neural network model of a load-sensing h Author: Travis Wiens

Note that the "complex method" package is now available at http://www.mathworks.com/matlabcentral/fileexchange/25428-complex-method-of-optimization

Comments and Ratings on Travis Wiens' Files View all
Updated File Comment by Comments Rating
11 Nov 2014 Linear Regression with Errors in X and Y Calculates slope and intercept for linear regression of data with errors in X and Y. Author: Travis Wiens Juan

Hi Travis,
It looks like code is supposed to do exactly what I am after, unfortunately I am having problems with your York_fit.m code:

at 40 ==> tmp=Y/[X; ones(1,N)]; shouldn't it be tmp=[Y/X; ones(1,N)]; ?

but even if I change this I am still encountering more errors:

??? Error using ==> times
Matrix dimensions must agree.

Error in ==> york_fit at 58
Y_bar=sum(W.*Y)/sum(W);

25 Oct 2014 Radial Basis Function Network Simulates and trains Gaussian and polyharmonic spline radial basis function networks. Author: Travis Wiens Shunmugesh

Dear Sir.,

I am new to ANN and i want to use RBF for my drilling optimization problem.
Which consist of 3 input and 3 output.
I would appreciate if you get in matlab coding.
Pl send the code to shunmugesh@gmail.com

13 Oct 2014 Day Length Calculates the length of daylight for any day and latitude Author: Travis Wiens Chad Greene

This is a helpful function; thanks for sharing.

The input day format is somewhat non-user-friendly. The function header describes the input date as the "day of the year, counted starting with the day of the December solstice in the first year of a Great Year." To maintain Travis' functionality and get this function to work with Matlab's datenum format, add this to the beginning of the function:

if nargin>0 && any(Day>366)
[y,~,~] = datevec(Day);
Day = 11+datenum(Day)-datenum(y,1,1);
end

The above assumes that if any input date exceeds 366, it must be in datenum format. Then the function *approximates* day length assuming a static December solstice. Results will not be exact on the daily timescale, but should be sufficient to put multi-year data in datenum format in context with solar cycles.

08 Oct 2014 Linear Regression with Errors in X and Y Calculates slope and intercept for linear regression of data with errors in X and Y. Author: Travis Wiens Felix

I really like the code but is it possible to force the linear regression to go through the origin, i.e. a=0?

22 Sep 2014 Linear Regression with Errors in X and Y Calculates slope and intercept for linear regression of data with errors in X and Y. Author: Travis Wiens Travis Wiens

Rainer Boegle: This method is only for a single input.

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