统计相关课程非常喜欢R语言, 它有很多统计相关的library, 非常容易使用.
Question 1 (Multiple Linear Regression, 3.0 points) Consider the multiple linear regression model to regress the logarithm of “Course_eval” on all the other variables in the dataset (please do not consider the interaction terms for now). Please answer the following questions in the answer sheet. a) (1 point) Please use R to fit the model. […]
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Econ 3818 Fall 2018 R exercise 2 Due September 18th 5pm via Desire to Learn Dropbox as a pdf file. Write up your answers and paste the R code used in a word document. Separate the R code above and below by three asterisk (***). Copy and paste all plots generated into the word document.
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Assignment 3: Spam, wonderful spam Thomas Lumley 9/5/2018 This assignment uses the SMS Spam dataset from Canvas Use rpart to fit and prune (if necessary) a tree predicting spam/non-spam from the common word counts in the wordmatrix matrix. Report the accuracy with a confusion matrix. Plot the fitted tree (without all the labels) and comment
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Econ 3818 Fall 2018 R exercise 1 Due September 4th 5pm via Desire to Learn Dropbox as a pdf file. Write up your answers and paste the R code used in a word document. Separate the R code above and below by three asterisk (***). Copy and paste all plots generated into the word document.
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1. Use a programming language or package where random forests can be trained and applied. Examples include Python (scikit-learn package), R and Matlab. Using the training and test sets specified in the syllabus, perform the following tasks: a) On the madelon dataset, for each of k ∈ {3, 10, 30, 100, 300} train a random
python R语言 代写 机器学习代写 随机森林 random forest Read More »
The zip file has 332 comma-separated-value (CSV) files containing pollution monitoring data for fine particulate matter (PM) air pollution at 332 locations. Each file contains data from a single monitor and the ID number for each monitor is contained in the file name. For example, data for monitor 200 is contained in the file
MAS281 Block 1 Assignment 1 Background You are working for a Contract Research Organisation specialising in health technology ap- praisals. Your organisation has been commissioned by a pharmaceutical company to produce a cost-effectiveness analysis for their new drug for osteoporosis, for submission to NICE. The analysis will present the case for the use of a
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1 Instructions 2 Ob jectives There are three main objectives in this assignment Is there indirect evidence suggestive of data manipulation across the universe of publicly traded US companies? Could we have forecasted the accounting scandal at Satyam based on the Beneish M-Score model? Despite concerns about data quality, is accounting information incrementally useful for
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In this homework, we will work with the “tweets-2017-1004” network. This is a set of 318 hashtags mined from Twitter on 10/4/2017. It is a one-mode hashtag projection of the user-hashtag bipartite network. In other words, there is a link between two hashtags if a given user used both of them within the data gathering
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