Cross Validated Questions, Problems & Solutions : TransWikia.com ~ Page 6

Randomly sample point from a 2D pdf image

I have a 2D image, each pixel of it representing a probability. Now I want to randomly select a point from the image, such that the probability of the position...

Asked on 12/29/2021 by C. Wang

1 answer

Spline regression with many features in R

I have high-dimensional data that I'd like to fit a spline to then predict values given a held out set. I am currently fitting a linear regression model on my...

Asked on 12/29/2021 by user2117258

1 answer

transfer function-noise modelling in R

I recently started to learn transfer-function model, which, more specifically, is transfer-function-noise model(TFN). I have also attempted modeling it in R. I found one thing that is baffling. ...

Asked on 12/29/2021 by stucash

1 answer

Interpreting classification report scores

I have been working with multi-class classification where the labels have four classes in total. I have used Random forest classifier and also performed cross validation and was able to...

Asked on 12/29/2021 by MXavier

1 answer

Laplace mechanism on vector record?

Does the definition of neighboring database in differential privacy capture the multi-dimensional record? Let's say we have a database domain $mathbb{N}^{ntimes d}$ where $n$ is the number of...

Asked on 12/29/2021

1 answer

About Murphy's notation: why is $p(y|x, theta)$ a conditional expectation when there is no probabilistic interpretation on $x$ or $theta$?

In section 1.4.5 of Kevin Murphy ML textbook, he introduces linear regression where for a given data $x$, the target $y$ is assumed to be obtained through ...

Asked on 12/29/2021

1 answer

Can I fit a complex model in two stages (maximum likelihood)?

BackgroundI have a rather complex non-linear mixed model. It's intended to model exponentially decaying responses to transient events in animal behaviour experiments. In addition, I've used latent variables...

Asked on 12/29/2021

0 answer

Should I run a machine learning model many times?

I am comparing different classification models and for a given model (let's say logistic regression), everytime I run it, it obviously produces a slightly different value for the Accuracy and...

Asked on 12/29/2021 by ka28mi

2 answer

Which correlation method to us?

I am debating whether to use Pearson's correlation or Kendall's tau on a set of data. While linear relationships among subsets of the data are reasonable, I am deeply skeptical...

Asked on 12/29/2021

1 answer

How to interpret coefficients from regularized cox regression?

I have computed regularized coxph model with LASSO penalty, some of the covariates are thus omited. But I got some non-zero betas. Is it possible to interpret these values, in...

Asked on 12/29/2021

1 answer

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