Answered
PCA princomp help please
There are some examples where Principal Component Analysis is used for regression. Traditional regression analysis assumes ...

mer än 12 år ago | 0

Answered
How to use the outputs of the Stepwise function?
Hi John The stepwise function in Statistics Toolbox is used for liner regression. If you want to use a stepwise type alg...

mer än 12 år ago | 0

Answered
Perform sequential feature selection for classification of noisy features - code explanation
Hi Adrian I did a two part series on Loren Shure's blog contrasting feature selection techniques with regularization. The ar...

mer än 12 år ago | 1

Answered
Non-linear regression
For what its worth, I just took a very quick look at the data set that you provided. years = [1982 1983 1984 1985 1986 1987...

mer än 12 år ago | 0

Answered
uncertainty and curve fitting
If you need confidence intervals nlinfit is a better option

mer än 12 år ago | 0

| accepted

Answered
Non-linear regression
I'd strongly suggestion that you watch a webinar titled "Electricity Load and Price Forecasting with MATLAB". The webinar is av...

mer än 12 år ago | 1

Answered
Linear Regression - more weight on specific Bins of data
MathWorks tech support has a solution documenting various options for weighted regression. http://www.mathworks.com/support/s...

mer än 12 år ago | 2

Answered
how to deal with a missing value of a time series?
Hi Yoshiko The treatment of missing data is a fairly complicated topic. The choice of techniques to handle a missing data prob...

mer än 12 år ago | 0

Answered
stats toolbox...fitting a curve to a plot in log log space
Question and a Comment First, the question: It's unclear whether you are trying to do a curve fit or a distribution fit. Yo...

mer än 12 år ago | 0

Answered
Surface fitting tool, results accuracy
Offhand, I don't know any way to change the display within the tool itself. With this said and done, its fairly easy to 1. ...

mer än 12 år ago | 0

| accepted

Answered
fitting a polynomial function to data points and ploting it
If you have Curve Fitting Toolbox, you can generate everything you need as follows X = 1:100; X = X'; Y = X.^2 + 3*X + 5 ...

mer än 12 år ago | 0

| accepted

Answered
SVM Regression
The SVM implementation in Bioinformatics Toolbox does not support Support Vector Regression. With this said and done, the boo...

mer än 12 år ago | 0

Answered
How to fit a curve with forced initial value
Hi Phillippe If you have Statistics Toolbox or Curve Fitting Toolbox its relatively easy to force this type of constraint. ...

mer än 12 år ago | 1

| accepted

Answered
how to select random rows from a matrix?
Statistics Toolbox includes a nice function called randsample % Generate a matrix named foo foo = randn(10000,2); ...

mer än 12 år ago | 4

Answered
Linear data fitting
From my perspective, the easiest way to solve this one is # Fit a linear model to the complete data set # Apply a clustering al...

mer än 12 år ago | 0

Answered
Which curve fitting function do I need?
nlinfit uses optimization solvers under the hood, so it's not too surprising that you're getting the same answer. nlinfit is pa...

mer än 12 år ago | 1

Answered
General Least Squares Fit
Thanks for clarifying. From the sounds of things, you need some kind of solution for non-parametric fitting. The choice of...

mer än 12 år ago | 0

Answered
General Least Squares Fit
I am somewhat confused by the question. Regression analysis is used to estimate a set of regression coefficients than minimiz...

mer än 12 år ago | 0

Answered
Multinomial logistic regression
The following example deals with Poisson regression rather than logistic regression. I'm posting this because it includes a fair...

mer än 12 år ago | 0

Answered
How to estimate Standard Error for the coefficients in ridge regression aproach
If you're working with a ridge regression model (as opposed to lasso or elastic net) then its relatively easy to code up a paire...

mer än 12 år ago | 1

Answered
Populating a 3D lookup table
Hi Stephen I did a webinar a couple years back focusing on using sftool to generate lookup tables for Simulink. The webi...

mer än 12 år ago | 0

Answered
Markov Chain - Hidden Markov Model; how to create markov chains and combine them to a hidden markov model
When I am working with Markov Chains I'm normally looking at stationary distributions which, by definition, don't depend on the ...

nästan 13 år ago | 1

Answered
Bootstrap sampling depending on portfolio
Hi Philip I attached a couple different examples of residual bootstraps using MATLAB The following reference provides some...

nästan 13 år ago | 0

Answered
Curve fitting to data sets with multiple parameters
The easiest way to solve this type of problem is the nlinfit function inside Statistics Toolbox. Here's a simple example that d...

nästan 13 år ago | 1

Answered
Optimal(default) bandwidth estimation method
You can open ksdensity.m in your editor and inspect the bandwidth estimation code. This section of the code starts at line 29...

nästan 13 år ago | 0

Answered
Bootstrap for surface fit goodness of fit stats
Few quick observations First: There are a lot of different ways to bootstrap a regression model. Some of the more common exam...

nästan 13 år ago | 1

Answered
Multi-Dimensional Data for SVM
Hi Ziggy First: Statistics Toolbox has a number of good classification algorithms. The 11a release includes a variety of di...

nästan 13 år ago | 0

Answered
how to use cfit to get fitobject and gof from a separately provided line
The aren't any constructor options for the Fit Objects in Curve Fitting Toolbox. The easiest way to accomplish your goal is t...

nästan 13 år ago | 0

Answered
Interpolating Multivariate time series
Handling missing data is a very complicated topic. There are a number of different approaches that you can use including listwi...

nästan 13 år ago | 0

Answered
Problem of robust fitting using the "robustfit" function
Hi Massinissa In your first example, you are fitting Z as a function of X and Y. In the second you are fitting X as a function...

nästan 13 år ago | 0

| accepted