Publications by Karthik Munnam
Assignment # 8
##5. We have seen that we can fit an SVM with a non-linear kernel in order to perform classification using a non-linear decision boundary. We will now see that we can also obtain a non-linear decision boundary by performing logistic regression using non-linear transformations of the features. (a) Generate a data set with n = 500 and p = 2, suc...
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Assignment7
library(ISLR) library(caret) ## Loading required package: ggplot2 ## Loading required package: lattice library(tree) library(rattle) ## Loading required package: tibble ## Loading required package: bitops ## Rattle: A free graphical interface for data science with R. ## Version 5.5.1 Copyright (c) 2006-2021 Togaware Pty Ltd. ## Type 'rattle()' to s...
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Assignment7
library(ISLR) library(caret) ## Loading required package: ggplot2 ## Loading required package: lattice library(tree) library(rattle) ## Loading required package: tibble ## Loading required package: bitops ## Rattle: A free graphical interface for data science with R. ## Version 5.5.1 Copyright (c) 2006-2021 Togaware Pty Ltd. ## Type 'rattle()' to s...
4203 sym R (7135 sym/63 pcs) 8 img
Document
2. For parts (a) through (c), indicate which of i. through iv. is correct. Justify your answer. (a) The lasso, relative to least squares, is: More flexible and hence will give improved prediction accuracy when its increase in bias is less than its decrease in variance. More flexible and hence will give improved prediction accuracy when its increa...
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Assignment 4
Question 3 Explain how k-fold cross-validation is implemented. The set of observations is divided into k groups, or folds, of roughly equal size, at random in k-fold cross validation. The statistical learning approach is applied/fitted on the remaining k − 1 folds, with the initial fold serving as a validation set. Next, the observations in the h...
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Exercise3
##This question should be answered using the Weekly data set, which is part of the ISLR package. This data is similar in nature to the Smarket data from this chapter’s lab, except that it contains 1, 089 weekly returns for 21 years, from the beginning of 1990 to the end of 2010. ##a). Produce some numerical and graphical summaries of the Weekly d...
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Assignment 2
library(ISLR) library(tidyverse) ## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ── ## ✔ dplyr 1.1.3 ✔ readr 2.1.4 ## ✔ forcats 1.0.0 ✔ stringr 1.5.0 ## ✔ ggplot2 3.4.3 ✔ tibble 3.2.1 ## ✔ lubridate 1.9.2 ✔ tidyr...
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