# All Questions

136,552 questions
40 views

### Survival analysis in R

My question relates to the answer here: How to plot adjusted Kaplan-Meier Curves?. I can not understand why there is no covariate ("blood pressure") in this code? So, there are 4 groups, they are ...
34 views

### Is there a measure of “complexity” for linear/nonlinear model terms?

My apologies if this is grossly misunderstood or mis-worded, but I've been mildly bugged by a question to which I've not found a satisfactory answer. I can't say that I have seen a discussion about ...
9 views

### How to compare between multiple factors in GLM

I have read many books and papers comparing GLMS with just a couple of factors with 2 levels, however I am trying to compare whether the presence of parasites differs by month over a 12 month period. ...
15 views

### How to statistically infer common pattern in text

Am trying to solve a problem where I need to infer common patterns in text for example, the data below, with bare eyes it can be noticed there is a pattern and that is ...
9 views

### Application of Recursive Feature Elimination to Support Vector Machine Model

I have developed a support vector machine model with 78 features on which I would like to apply recursive feature elimination. I developed the model with the package ‘rminer’. fitmodel<-fit(...
9 views

### error in information theory

At the risk of sounding vague, someone told me that errors in information theory usually comes in the form of $c/t$, $c/t^{\alpha}$, or $\exp{(-\alpha t)}$, where $t$ is the $t-$ (or $x$ axis). I ...
9 views

### Approximating a proxy to the mutual information with Monte-Carlo sampling and Restricted Boltzmann machines

I first asked this in the physics community, to no avail, so now I'm here! I've been reading through Koch-Janusz and Ringel's, "Mutual Information, Neural Networks, and the Renormalization Group" (...
21 views

### Efficiently Computing The Beta CDF [duplicate]

I am using numba to JIT compile some looped python functions as part of a larger application. Ideally, everything will run in numba's "no python" mode, such that the loop can be parallelised. One of ...
26 views

### Compare two samples with many zeros

We carry out a number of some experiments and got 10 independent 2-samples datasets. Is it possible to show a significant difference between the two samples, if each of them contains more than 75% ...
12 views

### Theoretical cdf [on hold]

Is it possible to plot multiple theoretical cdf in one plot using R? I have used the fitdist function in the fitdistrplus package to get both the emperical and theoretical cdf. Using cdfcomp() gives ...
18 views

### How to find maximum probability [on hold]

Members of a mafia group gathered at a secret hideaway. The city police come to know about the meeting and plan to arrest the leader of the group. The police know that the members of the mafia will ...
7 views

### Time series analysis. Showing stationarity and acf [on hold]

Consider an at(2) process given by xt=1/4x(t-1) + 3/4 x(t-2) + et. Show that its stationary and hence find it's act
16 views

### Modelling enzyme reaction kinetics in R

I have a simple data set with three experiments, three replicates each, measurements of enzyme activity performed at concentrations of an enzyme of 0, 1, 10 and 100. Is there a standard way, ...
18 views

### Extract some columns from different two dataframes by matching dates in a range of 30 minutes [on hold]

I have two different data frames. First one has 14 columns and 255k rows. Second one has 18 columns x 6150 rows. First columns of both data frames are dates in POSIXlt ("%Y-%m-%d %H:%M"). The ranges ...
11 views

### Model with lower no of layers is getting better performance than standard models

Hi Everyone I am a beginner in deep learning. I am doing my research work in deep learning. The topic on which I am working is Skin cancer image classification. I have tried training various standard ...
12 views

### Unsupervised clustering of sequence of events to subsequences

I have a big dataset of M sequences of [1 - N] events, where each event has multiple properties (start date, end date, location, ...