Community Profile Richard Willey

MathWorks

Active since 2011

Statistics

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New Regression Capabilities in r2012a
Example code to accompany the "New Regression Capabilities" presentation Submitted

Computational Statistics: Feature Selection, Regularization, and Shrinkage
MATLAB code for "Computational Statistics: Feature Selection, Regularization, and Shrinkage" Submitted

Data Driven Fitting with MATLAB
Demostration code and data sets for the "Data Driven Fitting with MATLAB" webinar. Submitted

Exploring Protein-DNA Binding Sites from Paired-End ChIP-Seq Data
MATLAB code for the "Exploring Protein-DNA Binding Sites from Paired-End ChIP-Seq Data" webinar. Submitted

Fitting with MATLAB: Statistics, Optimization, and Curve Fitting
Demo code and data for the "Fitting with MATLAB" webinar Submitted

Introduction to Classification
Files and code from Computational Statistics: Getting Started with Classification using MATLAB® Submitted

MATLAB code for the nonparametric fitting video
Use localized regression, cross validation, and the bootstrap for nonparametric fitting.

Submitted

Optimizing breakpoints for Tables
MATLAB code to support the "Generating Optimal Tables using MATLAB" webinar. Submitted

Computational Statistics Webinar
Use cross validation and Bootstrap to enhance LOESS

Crossvalidation of Classification Trees?
I recommend that you look at the following example from the file exchange http://www.mathworks.com/matlabcentral/fileexchange...

9 years ago | 0

linear regression
Alternatively, if you have the 12a version of Statistics Tbx X = [1,2,3,4,5,6,7,8,9]; Y = [4 5 6 9 8 7 4 1 2]; my...

9 years ago | 1

How to apply Random walks ?
MATLAB includes a wide variety of functions that can be used to simulate a random walk. Depending on what precisely you want to...

9 years ago | 1

What is a reasonable lower time limit for regstats?
MATLAB and Statistics Toolbox provide a variety of ways to perform a regression. For example, if I am performing a simple linea...

9 years ago | 1

Parametric bootstraping in curve fitting
In general when I hear the expression parametric bootstrap I think "parametric residual bootstrap" I'm attaching some simple ...

9 years ago | 1

| accepted

How do I Regression Fit a SinWave to a dataset?
Here's some simple code that illustrates how to perform nonlinear regression using the 12a release of Statistics Toolbox. Not...

9 years ago | 1

Homework help.
Couple quick questions / comments 1. are you sure you typed in the model correctly? This looks very close to a Gompertz fun...

9 years ago | 0

Curve fitting f(x,y) result
I'm attaching code that shows a couple different ways to solve your problem. I prefer the second option. The R^2 is slightly...

9 years ago | 1

Curve fitting f(x,y) result
Hi ZazOufUMl A "Poly31" model is different than the one that I suggested. (Poly31 will contain a number of cross terms). ...

9 years ago | 0

Curve fitting f(x,y) result
Hi there The "Poly54" fit type is specifying a 5th order polynomial in one direction and a 4th order polynomial in the other....

9 years ago | 0

Matlab - How to Generate Random Numbers from a Specific Probability Density
If Pv and Pa can both be described as functions of a, you might be able to use a univariate generator to generate plausible valu...

10 years ago | 0

Multicolinearity/Regression/PCA and choice of optimal model (2nd try)
I'm attaching some code that might provide helpful I also have a two part blog posting on this same subject that provides a b...

10 years ago | 0

| accepted

The problem of using rng to generate random numbers.
From the sounds of things, the simplest thing to do would be to generate all of your random numbers OUTSIDE your loop. Start ...

10 years ago | 0

The problem of using rng to generate random numbers.
It's hard to make a specific recommendation without known more about the use case. What (specifically) are you trying to acco...

10 years ago | 0

classifier
I did a webinar a couple years titled: "Computational Statistics: An Introduction to Classification with MATLAB". You can ...

10 years ago | 0

Surface Fitting Tool Coefficient Structure
Local regression (aka LOWESS/LOESS) and interpolation don't lend themselves to parametric representations. There really isn't a...

10 years ago | 0

| accepted

Curve smoothing using Matlab
I have a function called FitIt on the file exchange that might prove useful. FitIt combines Local regression (to smooth yo...

10 years ago | 0

Get Y values from Curve Fitting Tool
For simplicity, this code is using a simple linear model. However, the same syntax with work for your nonlinear regression. ...

10 years ago | 7

| accepted

Least squares linear regression when squares have to do with elasticity?
Here's a simple example using the new regression functions in the 12a release. All you need to do is pass the appropriate weigh...

10 years ago | 1