Publications by Farhana Zahir
Final Project
Introduction This project looks at the relationship between daily stock returns and mean twitter sentiment scores.There are lots of research article on the web about the relationship between social media sentiments and stock prices. In this project, we have tried to identify whether there is any relationship between daily returns for three tech s...
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Final project Microsoft
library(SentimentAnalysis) ## ## Attaching package: 'SentimentAnalysis' ## The following object is masked from 'package:base': ## ## write library(tidyverse) ## -- Attaching packages ---------------------------------------------------------------- tidyverse 1.2.1 -- ## v ggplot2 3.2.1 v purrr 0.3.3 ## v tibble 2.1.3 v dplyr ...
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Final project Apple
library(SentimentAnalysis) ## ## Attaching package: 'SentimentAnalysis' ## The following object is masked from 'package:base': ## ## write library(tidyverse) ## -- Attaching packages ---------------------------------------------------------------- tidyverse 1.2.1 -- ## v ggplot2 3.2.1 v purrr 0.3.3 ## v tibble 2.1.3 v dplyr ...
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Tidyverse Part 2
library(tidyverse) ## -- Attaching packages ---------------------------------------------------------------- tidyverse 1.2.1 -- ## v ggplot2 3.2.1 v purrr 0.3.3 ## v tibble 2.1.3 v dplyr 0.8.3 ## v tidyr 1.0.0 v stringr 1.4.0 ## v readr 1.3.1 v forcats 0.4.0 ## -- Conflicts ---------------------------------------------...
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Tidyverse Assignment
Task Create an Example Using one or more TidyVerse packages, and any dataset from fivethirtyeight.com or Kaggle, create a programming sample “vignette” that demonstrates how to use one or more of the capabilities of the selected TidyVerse package with your selected dataset. (25 points) Extend an Existing Example Using one of your classmate’...
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Data 607 Assignment08
Tasks required For this assignment, you should take information from a relational database and migrate it to a NoSQL database of your own choosing. For the relational database, you might use the flights database, the tb database, the “data skills” database your team created for Project 3, or another database of your own choosing or creation. ...
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FZahir_Assignment03
Problem Set 1 Question 1 What is the rank of the matrix A? \[A=\begin{vmatrix} 1 & 2 & 3& 4 \\ -1 & 0 & 1 & 3\\ 0&1&-2&1\\5&4&-2&3\end{vmatrix}\] The rank of a matrix is defined as the number of linearly independent rows or linearly independent columns in a matrix A. The process for computing the rank involves translating a matrix into echelon f...
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FZahirDiscussion5
Continuous density functions Problem 2 page 71 Suppose you choose a real number X from the interval [2,10] with a density function of the form f(x)=Cx where C is a constant a)Find C. b) Find P(E) where E=[a,b] is a subinterval of [2,10]. c) Find P(X>5) , P(X<7), and P(X2−12X+35>0) Solution: To find C, we require the probability over the entire...
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Data 605 Assignment 05
library(pracma) library(ggplot2) Problem Set 1 Choose independently two numbers B and C at random from the interval [0, 1] with uniform density. Prove that B and C are proper probability distributions. Note that the point (B,C) is then chosen at random in the unit square. #randomly select 10,000 numbers between 0 and 1 B <- runif(10000, min = ...
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FZahirDiscussion7
Sums of discrete random variables Problem 03 page 289 Let \(X_{1}\) and \(X_{2}\) be independent random variables with the same distribution \[p_{X} = \left\{\begin{matrix} \frac{1}{8} \text{ ; if }x=0\\ \frac{3}{8} \text{ ; if }x=1\\ \frac{1}{2} \text{ ; if }x=2 \end{matrix}\right.\] Find the distribution of \(S_{2} = X_{1} + X_{2}\) Solution: ...
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