I have a graph with a line drawn on it. I want to user to be able to change the orientation of the line by “clicking and dragging”. To do this need to implement drag-handles. Here’s how … (more…)
Tag Archives: JSL
Linearly Separable Data
In my last post I outlined some “homework” that I had set myself – to write a script that would create linearly separable data. I want the ability to create it in an interactive environment. (more…)
Some Homework
Don’t worry. The homework is for me, not you. But feel free to have a go yourself also! I want to create a set of data which contains a binary response that is linearly separable within a plane defined by two input variables. (more…)
Oneway Advisor
I want to show you an example of some software designed to help you be more productive and consistent in applying statistical tests. It’s designed to work along side a oneway analysis of variance and will automatically assess the assumptions associated with the analysis.
Analysing My Fitness Data
I like watches and the Garmin Forerunner caught my eye. So to justify buying one I’ve had to start running!
Asserting Your Beliefs
"the programmer should make a number of definite assertions which can be checked individually, and from which the correctness of the whole program follows" - Alan Turin
Performance Profiling
In my last post I illustrated the performance boost generated by using matrix operations to conduct least squares regression calculations. Matrices by their nature require numerical data. So what about handling a categorical predictor variable? To do this it’s necessary to create dummy variables – separate variables for each unique level of the predictor variable.
Regression in Matrix Form
I’m working on some predictive modelling projects and I need to iteratively compute R2 statistics over 100’s of variables. Each time I do the calculations I need to go and have an extended coffee break – and I’m starting to buzz with too much caffeine so I thought I would look to see whether I could make my code more efficient!
Handling Lists of Columns
Note from author: this remains one of the most popular posts on this blog – so I have written an update.
A number of platforms in JMP allow for a variable number of columns. I want to take a look at how to handle this situation using the JMP scripting language.
Column References
A column of a JMP table acts as the primary source of data for most types of analysis within JMP. That is evident by the fact that the first task you perform when you launch a platform is to assign columns to roles: