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Curriculum
- 47 Sections
- 230 Lessons
- 10 Weeks
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- R - Chi Square Test0
- R - OperatorsAn operator is a symbol that tells the compiler to perform specific mathematical or logical manipulations. R language is rich in built-in operators and provides following types of operators.5
- R - Overview3
- R - Environment Setup1
- R - Basic Syntax4
- R - Data Types7
- R - Variables5
- R - Decision making1
- R - Loops2
- R - Functions7
- R - Strings3
- R - Vectors4
- R - Lists7
- R - Matrices3
- R - Arrays5
- R - Factors4
- R - Data Frames6
- R - Packages7
- R - Data Reshaping6
- R - CSV Files6
- R - Excel File5
- R - Binary Files3
- R - XML Files5
- R - JSON Files5
- R - Web Data4
- R - Databases9
- R - Pie Charts4
- R - Bar Charts3
- R - Boxplots3
- R - Histograms2
- R - Line Graphs3
- R - Scatterplots3
- R - Mean, Median and Mode6
- R - Linear Regression4
- R - Multiple Regression3
- R - Logistic Regression2
- R - Normal Distribution5
- R - Binomial Distribution5
- R - Poisson Regression2
- R - Analysis of Covariance5
- R - Time Series Analysis3
- R - Nonlinear Least Square2
- R - Decision Tree2
- R - Random Forest2
- R - Survival Analysis2
- R - Chi Square Test3
- R - Interview Questions49
- 47.1What is R Programming?
- 47.2What are the different data objects in R?
- 47.3What makes a valid variable name in R?
- 47.4What is the main difference between an Array and a matrix?
- 47.5Which data object in R is used to store and process categorical data?
- 47.6How can you load and use csv file in R?
- 47.7How do you get the name of the current working directory in R?
- 47.8What is R Base package?
- 47.9How R is used in logistic regression?
- 47.10How do you access the element in the 2nd column and 4th row of a matrix named M?
- 47.11What is recycling of elements in a vector? Give an example.
- 47.12What are different ways to call a function in R?
- 47.13What is lazy function evaluation in R?
- 47.14How do you install a package in R?
- 47.15Name a R packages which is used to read XML files.
- 47.16Can we update and delete any of the elements in a list?
- 47.17Give the general expression to create a matrix in R.
- 47.18which function is used to create a boxplot graph in R?
- 47.19In doing time series analysis, what does frequency = 6 means in the ts() function?
- 47.20What is reshaping of data in R?
- 47.21What is the output of runif(4)?
- 47.22How to get a list of all the packages installed in R ?
- 47.23What is expected from running the command – strsplit(x,”e”)?
- 47.24Give a R script to extract all the unique words in uppercase from the string – “The quick brown fox jumps over the lazy dog”.
- 47.25Vector v is c(1,2,3,4) and list x is list(5:8), what is the output of v*x[1]?
- 47.26Vector v is c(1,2,3,4) and list x is list(5:8), what is the output of v*x[[1]]?
- 47.27What does unlist() do?
- 47.28Give the R expression to get 26 or less heads from a 51 tosses of a coin using pbinom.
- 47.29X is the vector c(5,9.2,3,8.51,NA), What is the output of mean(x)?
- 47.30How do you convert the data in a JSON file to a data frame?
- 47.31Give a function in R that replaces all missing values of a vector x with the sum of elements of that vector?
- 47.32What is the use of apply() in R?
- 47.33Is an array a matrix or a matrix an array?
- 47.34How to find the help page on missing values?
- 47.35How do you get the standard deviation for a vector x?
- 47.36How do you set the path for current working directory in R?
- 47.37What is the difference between “%%” and “%/%”?
- 47.38What does col.max(x) do?
- 47.39Give the command to create a histogram.
- 47.40How do you remove a vector from the R workspace?
- 47.41List the data sets available in all available packages.
- 47.42What is the use of the command – install.packages(file.choose(), repos=NULL)?
- 47.43Give the command to check if the element 15 is present in vector x.
- 47.44Give the syntax for creating scatterplot matrices.
- 47.45What is the difference between subset() function and sample() function in R?
- 47.46How do you check if “m” is a matrix data object in R?
- 47.47What is the output for the below expression all(NA==NA)?
- 47.48How to obtain the transpose of a matrix in R?
- 47.49What is the use of “next” statement in R?
