Tagged Questions
10
votes
0answers
137 views
2
votes
1answer
72 views
How to get confidence bands of parameters from a fitting procedure?
I have done fitting of data points with a given model that has two parameters (A and B), using NonlinearModelFit. The result of the fit is the maximum of the ...
4
votes
1answer
138 views
Multinomial logistic regression
Has anyone done multinomial logistic regression in Mathematica?
The binomial case is essentially done on the LogitModelFit documentation page and works fine.
I am ...
6
votes
1answer
137 views
Obtaining standardised regression coeffiecients
Regression coefficients are the constant that indicate the rate of change in one variable as a function of change in another. Standardised regression coefficients are the same, but refer to a change ...
6
votes
1answer
193 views
Fix end point in smooth kernel distribution density
I am using some extreme value fitting method which results in a parametric distribution for values exceeding some threshold, all values $\geq 0$.
For smaller values I'd like to use a smooth kernel ...
3
votes
1answer
144 views
Getting slightly different results in fitting a logit model in R and Mathematica
I'm fitting some data to a Logit model in both Mathematica and R and I'm getting slightly different results.
R code:
...
3
votes
0answers
154 views
Mathematica Complains about Non Symmetric Covariance matrix, when it's not the case
I was doing some fitting with Mathematica7 using NonlinearModelFit. It's quite long the program to do the fit and that's why I am not displaying here ...
It goes ok, and I can get the fit parameters ...
13
votes
5answers
2k views
Estimate error on slope of linear regression given data with associated uncertainty
Given a set of data, is it possible to create a linear regression which has a slope error that takes into account the uncertainty of the data?
This is for a high school class, and so the normal ...
2
votes
2answers
221 views
Non-linear trend reduction with missing data
How can I reduce a non-linear trend of some data series if there are parts of "no data", represented by the value 99999? For example:
...
24
votes
4answers
2k views
Simultaneously fitting multiple datasets
What is the proposed approach if one wants to simultaneously fit multiple functions to multiple datasets with shared parameters?
As an example consider the following case: We have to measurements of ...
