Hello! This question builds on a topic/toy-model that I posted here , where @ricardoV94 helped me a lot. It’s a really simple asymptote function: y \sim N(\mu = \frac{x}{x+k}, \epsilon ) My real data is an ecological distance decay curve. The “noise” around the asymptote function is probably ac…

I played around (a tiny bit) with the code you provided. I can’t even get it run as it is. This seems to be due to the fact that the SD of y_pred is very likely to be \le 0 for some values of xnorm. If you are going to use a linear expression to characterize the scale of a parameter, you might co…

Modeling noising parameter that decreases (negatively varying variance)

Questions

ricardoV94 February 26, 2021, 4:21pm 9

The mean of the gamma must be positive:

    γ = pm.Gamma('γ', mu=-1.5, sigma = 0.5)

1 Like

Topic		Replies	Views
Gamma noise prior, upside-down? Questions	6	971	May 12, 2021
Need help with simple asymptote model using toy data Questions	3	454	January 28, 2021
Chain failure with an exponential model Questions	7	2103	September 18, 2019
ValueError: Bad initial energy: inf. The model might be misspecified Questions	1	1063	April 26, 2018
What to do with divergences in my case Questions	7	2495	September 21, 2017

Modeling noising parameter that decreases (negatively varying variance)

Related topics