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## DDPM
#### 1. propose the definition of forward equation. i.e.
and thus
#### 2. design a neutral network that has the below property to approximate the reverse(denoising) process
then we …
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I am trying to evaluate the expectation of a function of a normal random variable using Sympy 0.7.4.1
```
a, mu = symbols('x mu', real=True)
sigma = symbols('sigma', positive=True)
X = Normal("X", mu…
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**Describe the bug**
I am not sure if this is an oversight or a conscious design choice. When fitting a DDM model with random intercepts on a, v, and z, the random effect on v has a different coordin…
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Define the lognormal density starting from the normal:
```
var("mu", domain="real")
var("y, m, s, sigma", domain="positive")
dnorm(x, mu, sigma) = e^(-(x-mu)^2/(2*sigma^2))/(sigma*sqrt(2*pi))
dlnor…
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double inv_sigma=1.0/w_sigma; inv_sigma的作用与意义在那里？
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I have been using grid.transform extensively in my work and it works super well.
But I found myself writing a bunch of wrappers around it that I think we can integrate generally in xgcm.
## I w…
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Hi,
Thanks for developing scDesign3. I have SingleCellExperiment object. I want to simiulate it with scDesign3. but i get this error.
> example_simu
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### 🐛 Describe the bug
I believe `cholesky_backward` implementation is incorrect due to the false but well-intentioned assumption that $\overline{\Sigma}=\frac{S + S^\top}{2}$ is the backward gradi…
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### Description:
I tried to make `blob_dog` work on the `human_mitosis` dataset and it was hard. @tlambert03 gave the hint that this function may only work with images of type float. We were now wo…
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According to the [documentation](https://mc-stan.org/docs/2_26/functions-reference/normal-id-glm.html) one of the signatures for ```normal_id_glm``` is:
```
real normal_id_glm_lpdf(vector y | row_ve…