Publications by Leo Yi & Christopher Bloome
Document
Question One Using the 173 majors listed in fivethirtyeight.com’s College Majors dataset [https://fivethirtyeight.com/features/the-economic-guide-to-picking-a-college-major/], provide code that identifies the majors that contain either “DATA” or “STATISTICS” After uploading our data as a data frame, I added two new columns to test wheth...
4412 sym R (2677 sym/22 pcs) 1 tbl
607 Bloome W10
Introduction In this assignment we were asked to walk through an example sentiment analysis from Text Mining with R, A Tidy Approach by Julia Silge and David Robinson, 2020-03-07 (https://www.tidytextmining.com/index.html). Then, we were instructed to run a similar analysis on a different corpus, and to incorporate at least one additional sentime...
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Linkedin Rec System
LinkedIn has several uses. It serves as a social networking site and a job board, with recruiters fitting somewhere in between. The site seems to have several profit centers - it likely generates revenue from advertising, direct sales of an elevated product to job hunters and recruiters, as well as corporate sales to business for their recruiting...
5357 sym
Solving Strava
Intro Strava.com, a social networking website for endurance athletes, has a series of metrics for their premium users. We will be reverse engineering their Fitness metric - a status of fitness which changes over time based on the level of activity of the athlete. This appears to leverage a metric calculated for each workout called Relative Effort...
3720 sym R (10099 sym/32 pcs) 7 img
605D1
Find all Solutions to this linear system: x + y - z = -5 x - y - z = -3 x + y + z = 0 M <- matrix(c(1,1,-1,-5,1,-1,-1,-3,1,1,1,0),nrow = 3, byrow = TRUE) M ## [,1] [,2] [,3] [,4] ## [1,] 1 1 -1 -5 ## [2,] 1 -1 -1 -3 ## [3,] 1 1 1 0 M[3,] <- M[2,]+ M[3,] M ## [,1] [,2] [,3] [,4] ## [1,] 1 1 ...
91 sym R (582 sym/12 pcs)
604 - NY Marathon Optimization
Intro In addition to being a formidable physical challenge for the participants, the NYC Marathon is a logistical Everest for its organizational body - the New York Road Runners. The course takes some 50,000+ runners through all 5 boroughs. Starting in the secluded Staten Island, and ending in Central Park, the participants are escorted by approx...
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Document
library(geometry) ## Warning: package 'geometry' was built under R version 3.6.3 Problem Set 1 (1) Calculate the dot product u.v where u = [0.5; 0.5] and v = [3; −4] u = c(.5,.5) v = c(3,-4) dot(u,v) ## [1] -0.5 (2) What are the lengths of u and v? Please note that the mathematical notion of the length of a vector is not the same as a com...
1341 sym R (1138 sym/15 pcs)
CBloome_Assignment2
library(stats) Problem Set 1 (1) Show that A x At is not equal to At x A, in general cases, where At is the transposition of matrix A. For Matrix A A B C D And Matrix At A C B D The product A*At is equal to AA + BB AC + BD CA + DB CC + DD And At*A is equal to AA+BB AB+CD BA+DC CC+DD For unique values of B and C, these are not equivalent. A ...
945 sym R (3862 sym/15 pcs)
Document605HW8
#11 and #14 on page 303 of probability text (11) A company buys 100 lightbulbs, each of which has an exponential lifetime of 1000 hours. What is the expected time for the first of these bulbs to burn out? (See Exercise 10.) From Question 10, we know that the density for M (minimum of a series of value of a series of independent variables) is exp...
1416 sym R (193 sym/10 pcs)
605HW6
Q1 Marbles A box contains 54 red marbles, 9 white marbles, and 75 blue marbles. If a marble is randomly selected from the box, what is the probability that it is red or blue? Express your answer as a fraction or a decimal number rounded to four decimal places. (54+75)/(54+9+75) ## [1] 0.9347826 Q2 Golf Balls You are going to play mini golf. A ba...
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