## R language self study notes: basis of regression analysis

I Linear regression
1. lm() function returns the prediction model of input variables, and the returned results can be used with many functions.
> lm.model <- lm(wt ~ mpg, data = mtcars)
> coefficients(lm.model) # Extraction coefficient
(Intercept) mpg
6.047255 -0.140862
> confint(lm.model, level=0.95) # After the ...

Posted by **beerman** on *Tue, 08 Mar 2022 14:48:27 +0100*

## Topic C of the 14th "certification Cup" mathematical modeling network challenge in 2021

Background introduction
Since 2015, the shared automobile industry has "let a hundred flowers bloom" and many projects have received huge financing. However, due to the heavy model, high operating costs, inability to make profits and other problems, one after another shared car companies closed down due to the rupture of the capital ...

Posted by **BrentNorin** on *Tue, 08 Mar 2022 08:35:23 +0100*

## Deep learning linear algebra, probability and information theory

(3) Probability and information theory)
2, Linear algebra
Purpose: it is mainly to reduce the dimension of data and restore or build the target with the least data
2.1 eigenvalue decomposition
Only symmetric positive definite matrix can be decomposed into eigenvalues. Eigenvalue decomposition: A = P * B * PT, where B is the diagonal mat ...

Posted by **GeertDD** on *Sun, 06 Mar 2022 17:43:45 +0100*

## Mutation waterfall map and subtype mutation waterfall

After sequencing, we can observe the presence of different subtypes of mutations based on the data of different genotypes.
There is only one file to be prepared. The format is as follows:
This is the risk model I analyzed in TCGA gastric cancer (STAD) database. The gastric cancer data is divided into high and low risks, and the data ca ...

Posted by **mattkirkey** on *Sun, 06 Mar 2022 16:59:02 +0100*

## RNA 8. Differential gene expression in SCI articles -- Heatmap

preface
After differential expression, most of us will see whether our differential gene screening can show the grouping results, and will choose the heat map, mainly the heat map skill clustering, which can also show the size of expression, which is very intuitive. Therefore, in this issue, we will talk about the drawing method of heat map.
...

Posted by **deadimp** on *Mon, 28 Feb 2022 05:40:23 +0100*

## R Machine Learning: the principle and implementation of logistic regression classifier of classification algorithm

When I see the logistic regression classifier, my first reaction is that it's not a statistical logistic regression. In fact, it's the same. I've written about the practice of logistic regression before. I'll write it again under the framework of machine learning today.
logistic regression is a supervised learning method that predicts class ...

Posted by **vivek** on *Sun, 20 Feb 2022 08:42:28 +0100*

## RNA 4. edgeR based on TCGA differential expression in SCI articles

01. Preface
In the near future, it is expected that the emerging digital gene expression (DGE) technology will surpass microarray technology in many applications of functional genomics. One of the basic data analysis tasks, especially gene expression research, involves determining whether there is evidence that transcripts or exons are signifi ...

Posted by **rsassine** on *Fri, 18 Feb 2022 02:03:30 +0100*

## R language survival analysis: analysis of lymphoma patients with time-varying competitive risk model

Original link: http://tecdat.cn/?p=22422
In this paper, we describe a flexible competitive risk regression model. The regression model is designated as the transition probability, that is, the cumulative incidence in the competitive risk setting. The model includes the model of Fine and Gray (1999) as a special case. This can be used to te ...

Posted by **prometheuzz** on *Thu, 17 Feb 2022 18:47:12 +0100*

## R language - PWM for making motif

1, Introduction of PWM and PFM
Motif refers to the DNA sequence pattern that transcription factors prefer to bind or the sequence pattern that RNA binding proteins prefer to bind. PWM is generally used to represent motif.
The process of making PWM is as follows:
First, calculate the base frequency of each position of all sequences to obt ...

Posted by **Elle0000** on *Thu, 17 Feb 2022 02:42:48 +0100*

## R foundation of social network analysis: introduction and simple analysis of graph

Python wechat ordering applet course video
https://edu.csdn.net/course/detail/36074
Python actual combat quantitative transaction financial management system
https://edu.csdn.net/course/detail/35475 How to input the adjacency matrix stored on disk into R program is the starting point of social network analysis. The basic data structure and c ...

Posted by **aviavi** on *Sat, 12 Feb 2022 05:43:10 +0100*