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Dear r-sig-hpc members, I have developed a new method of interest to ecologists that involves solving a large optimization problem. One example I used in a recent paper had over 5,700 parameters. I have been using Matlab...
Hello, I was constructing a simple linear model with one categorical (3-levels) and one quantitative predictor variable for a colleague. I estimated model parameters with and without an intercept, sometimes called reference cell coding and cell means coding. Model...
My apologies! The structure is close to linear, but there is a scaling so that modeled proportions sum to 1.0, so the problem is nonlinear. There are quite a few linear constraints as all parameters are non-negative and...
Rolf, Yes, that is what is happening. I thought that lm() recognized the presence of a categorical variable as a replacement, if you will, for the intercept, but either my memory is faulty or the behavior of the function changed...
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