Publications by Lisa Szydziak
Discussion week 12 605 042121
title: “HW11 605 042421” author: “Lisa Szydziak” date: “4/24/2021” output: pdf_document: default word_document: default html_document: default DISCUSSION: Using R, build a multiple regression model for data that interests you. Include in this model at least one quadratic term, one dichotomous term, and one dichotomous vs. quantitativ...
2703 sym R (4091 sym/30 pcs) 3 img
HW12 605 Lszydziak 042421
The attached who.csv dataset contains real-world data from 2008. The variables included follow. Country: name of the country LifeExp: average life expectancy for the country in years InfantSurvival: proportion of those surviving to one year or more Under5Survival: proportion of those surviving to five years or more TBFree: proportion of the popul...
2493 sym R (15489 sym/112 pcs) 14 img
HW13 605 Lszydziak 050121
Calculus The problems have been computed by hand as well on a separate pdf document. Use integration by substitution to solve the integral below. \(\int{4e^{-7x} dx}\) Use substitution to solve: library(mosaic) ## Warning: package 'mosaic' was built under R version 4.0.5 ## Registered S3 method overwritten by 'mosaic': ## method ...
2469 sym R (2388 sym/43 pcs)
Lszydziak HW14 605 050721
This week, we’ll work out some Taylor Series expansions of popular functions. For each function, only consider its valid ranges as indicated in the notes when you are computing the Taylor Series expansion. Please submit your assignment as a R-Markdown document. \[ f(x) = 1/(1-x)\] Taylor’s Series is in the form: \[ \sum_{n=0}^{\infty}\frac{f^...
1706 sym
LSzydziak Final 605 051621
Problem 1. Using R, generate a random variable X that has 10,000 random uniform numbers from 1 to N, where N can be any number of your choosing greater than or equal to 6. Then generate a random variable Y that has 10,000 random normal numbers with a mean of \[\mu=\sigma=(N+1)/2\] library(gmodels) library(ggplot2) library(ggpubr) library(dplyr...
4972 sym R (55353 sym/162 pcs) 19 img
HW 9 Regression trees 624 LSzydziak 112121
library(AppliedPredictiveModeling) library(psych) library(reshape2) library(tidyverse) ## -- Attaching packages --------------------------------------- tidyverse 1.3.1 -- ## v ggplot2 3.3.5 v purrr 0.3.4 ## v tibble 3.1.4 v dplyr 1.0.7 ## v tidyr 1.1.3 v stringr 1.4.0 ## v readr 2.0.1 v forcats 0.5.1 ## -- Conflicts...
8875 sym R (88862 sym/245 pcs) 7 img
HW9 regression 606 LSzydziak 111721
Baby weights, Part I. (9.1, p. 350) The Child Health and Development Studies investigate a range of topics. One study considered all pregnancies between 1960 and 1967 among women in the Kaiser Foundation Health Plan in the San Francisco East Bay area. Here, we study the relationship between smoking and weight of the baby. The variable smoke is c...
7594 sym R (1617 sym/24 pcs) 6 img
HW8 Nonlinear 624 LSzydziak 111221
library(AppliedPredictiveModeling) library(psych) library(reshape2) library(tidyverse) ## -- Attaching packages --------------------------------------- tidyverse 1.3.1 -- ## v ggplot2 3.3.5 v purrr 0.3.4 ## v tibble 3.1.4 v dplyr 1.0.7 ## v tidyr 1.1.3 v stringr 1.4.0 ## v readr 2.0.1 v forcats 0.5.1 ## -- Conflicts...
5252 sym R (64136 sym/158 pcs) 18 img
Project proposal 606 LSzydziak 110221
title: “Project proposal 606” author: “Lisa Szydziak” date: “10/25/2021” output: html_document: default word_document: default pdf_document: default output: html_document Data Preparation # load data library(nycflights13) library(tidyr) library(dplyr) library(gmodels) library(ggplot2) library(ggpubr) library(psych) libr...
3318 sym R (11810 sym/44 pcs) 16 img 1 tbl
Project 1 time series 624 103121 LSzydziak
library(fpp3) ## -- Attaching packages -------------------------------------------- fpp3 0.4.0 -- ## v tibble 3.1.4 v tsibble 1.0.1 ## v dplyr 1.0.7 v tsibbledata 0.3.0 ## v tidyr 1.1.3 v feasts 0.2.2 ## v lubridate 1.7.10 v fable 0.3.1 ## v ggplot2 3.3.5 ## -- Conflicts -----------...
9112 sym R (33281 sym/318 pcs) 56 img