R rename variables in dataframe
[DOC File]John Miyamoto - University of Washington
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all.equal(x,y) is a utility to compare R objects x and y testing ``near equality''. If they are different, comparison is still made to some extent, and a report of the differences is returned. Don't use 'all.equal' directly in if expressions—either use 'identical' or combine the …
[DOCX File]Decision Tree to Decision Rules - BE COMPS RAIT, NERUL - …
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R tool, free software environment for statistical computing and graphics is studied. Using R tool, various data mining algorithms were implemented. R and its packages, functions and task views for data mining process and popular data mining techniques were learnt.
[DOCX File]Course Assignments & Reading - Jacob LaRiviere
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Create a new dataframe which is a random subset of 80% of the data (look at sample_n from the dplyr package. Estimate the model with and without demographic characteristics. Construct MSE for the training and test set for the models. Compare the out of sample MSE for the models. Which is lower implying the model does a better job of fitting the ...
[DOCX File]Practice for the practice Quiz
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Practice for the practice Quiz. Using Problem 12.2.1 Exercise 2 as a guide, use the ideas from Chapter 13 to answer the questions for table2.. Compute the rate and include it in a final dataframe …
[DOCX File]BASICS OF R
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R is an implementation and enhancement of the S language, which was developed at AT&T Bell Labs in the 1970s and ‘80s and left in the public domain after the breakup of AT&T. R has many similarities with Splus, another implementation of S for sale as a commercial software package.
University of Washington
checks whether all functions in a designated file, test.file, call only functions that are general purpose R functions or else are other functions in test.file. It returns a list
[DOCX File]Problem 1 – Asking Price for USEd Cars - Winona
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The dataframes to use in R are called Usedcars.working and Usedcars, which includes the make model information for these cars. For developing OLS regression models it will be easier to use the Usedcars.working data frame which you will probably want to rename. These data are also in the file Usedcars.JMP linked to the website.
[DOCX File]Introduction to data/Introduction to R
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R Setup. When we use R Markdown, we can include a combination of text, equations, and R code in our document. In this activity, we will focus on learning a little bit about R and incorporating R code into the document. R code is included in an R Markdown file in a “chunk”. Insert a chunk by pressing the Insert button above and selecting R:
[DOCX File]Part 1: Create some tables and graphs describing the new ...
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Using base R we’ve learned previously, perform these tasks to convert it to a table called county_data: Filter to just include rows where variable is cores. Rename the columns to variable, cores, county_name and FIPS. Drop the “variable” column. Covert cores to a number if it is a character (check with str()!)
[DOCX File]Technology - Winona State University
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The file.choose() option tells R I want to use my standard browser for finding the file to read into R. The header=T option names that the first line of the text file contains the variable names and the sep=”,” option tells R that the columns in the text file are separated by a comma.
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