- Computational Physics Research
- Software/Programming
- MATLAB
- Web Automation
- Web Automation with the PHP Programming Language and cURL Module
- Twtr - automated microblogging script using Twitter's Rest API. [Download it!]
- WPBlogr - automated blogging software, uses SOAP/XML-RPC to post to blogs. [Download it!]
- Rubylinkr - a little ditty that automatically creates short URLs
- Notebookr - logs into a Google Notebook account, and automatically posts notes
- Dynamic, Database Driven Websites with PHP + MySQL
- SingleBlackDating.com - a 200,000+ page dating site I made with a huge demographics database
- FileFin.com - a freeware file submission website that had 11784 software submissions over its lifetime
- Augmented Browsing with Ruby Programming Language + Watir Module
- FBPoster
- GGrouper
- VeohBlack
- Python
- Fun with Python: Simulating Baseball Pitches using 4th Order Runge-Kutta Method
- Fun with Python: Electric Field Using Trapezoid Method
- Fun with Python: Linear Algebra Solver
- Fun with Python: Gaussian Elimination
- Fun with Python: Factorial Calculator
- Java
- Fun Nerdy Stuff
- Electronic Prototyping with the Arduino Microcontroller
- Physics Demo: Non-Newtonian Fluids like Cornstarch + Water aka Oobleck
- Artificial Intelligence Software Class @ AHA Hackerspace
- Physics Fun: How Many Elephants of Stuff Comes Out of the Tailpipe of Your Car?
- Rube Goldberg and the 6 Simple Machines
- Science Fiction
20120211
Portfolio
MATLAB Graphical User Interface (GUI): Projectile Motion
MATLAB is yet another application and programming language I've added to my skill set this year. In this post I'm going to share with you a program I wrote in MATLAB that models projectile motion. It has a convenient little Graphical User Interface (GUI) where the user can input the initial velocity (m/s) and angle (degrees), and the program will spit out a x-y plot. [Download This!]
20120201
Java Project #12: Statistics
/**
* class Statistics finds the mean and standard deviation of given numbers.
*
* @author (Andrew Samuels)
* @version (04-09-2010)
*/
//import scanner
import java.util.Scanner;
public class Statistics
{
public static void main(String[] args)
{
//create variables
int size;
int i;
//create scanner
Scanner keyboard = new Scanner(System.in);
//capture size from user
System.out.print("How many numbers will be entered: ");
size = keyboard.nextInt();
//create array of "size"
double[] p = new double[size];
//read numbers from user one by one
for(i = 0; i < size; i ++)
{
System.out.print("Enter number " + (i + 1) +": ");
p[i] = keyboard.nextDouble();
}
//find mean
double sum = 0;
for(i = 0; i < size; i++)
{
sum = sum + p[i];
}
double mean = sum/(double)size;
System.out.println("Mean: " + mean);
//find standard deviation
double temp = 0;
for (i = 0; i < size; i++)
{
temp = temp + (p[i] - mean)*(p[i] - mean);
}
temp = Math.sqrt(temp/size);
System.out.println("Standard deviation: "+ temp);
}
}
Java Project #11: Array Work
This script shows off various array operations.
/**
* class ArrayWork.
*
* @author (Andrew Samuels)
* @version (04-05-2010)
*/
//import scanner
import java.util.Scanner;
public class ArrayWork
{
public static void main(String[] args)
{
//create variables
int length;
int i;
int zeros;
//create scanner
Scanner keyboard = new Scanner(System.in);
//capture length from user
System.out.print("Enter the length of array: ");
length = keyboard.nextInt();
int[] p = new int[length]; //creates array of length, "length"
System.out.println();
//read integers one by one
for(i = 0; i < length; i ++)
{
System.out.print("Enter number " + (i + 1) +": ");
p[i] = keyboard.nextInt();
}
//print numbers in order user entered them
System.out.print("Numbers: ");
System.out.println();
for(i = 0; i < length; i++)
{
System.out.print(p[i] + " ");
}
//find sum and average of of numbers and print them
int sum = 0;
for(i = 0; i < length; i++)
{
sum = sum + p[i];
}
System.out.println();
System.out.println("Sum: " + sum);
System.out.println();
double average = sum/(double)length;
System.out.println("Average: " + average);
System.out.println();
//find max and min in array and print
int maximum = p[0];
for (i = 0; i < length; i++)
{
if (p[i] > maximum)
{
maximum = p[i];
}
}
System.out.println("Maximum: " + maximum);
System.out.println();
int minimum = p[0];
for (i = 0; i < length; i++)
{
if (p[i] < minimum)
{
minimum = p[i];
}
}
System.out.println("Minimum: " + minimum);
System.out.println();
//print all positive numbers
System.out.println("Positives: ");
for (i = 0; i < length; i++)
{
if (p[i] > 0)
{
System.out.print(p[i]+" ");
}
}
//find and print zeros
zeros = countZeros(p);
System.out.println("Zeros: " + zeros);
//reverse array and print
printReverse(p);
}
//count zeros method
private static int countZeros(int[] array)
{
int answer = 0;
int i;
for(i = 0; i < array.length; i++)
{
if(array[i] == 0)
{
answer = answer + 1;
}
}
return answer;
}
//print reverse method
private static void printReverse(int[] array)
{
int i;
for(i = array.length - 1; i >= 0; i--)
{
System.out.print(array[i] + " ");
}
}
//display method
public static void display(int[] array)
{
for(int i = 0; i < array.length; i++)
{
System.out.println(array[i]);
}
}
}
Java Project #10: Area Finder
/**
* class AreaFinder compute area of square, rectangle, circle.
*
* @author (Andrew Samuels)
* @version (03-29-2010)
*/
public class AreaFinder
{
private static final double pi = 3.1415; //value of constant pi
private static int count = 0; //count of times area computed
//computes area of square
public static double squareArea(double sideOfSquare)
{
double areaOfSquare = sideOfSquare * sideOfSquare;
count++;
return areaOfSquare;
}
//computes area of rectangle
public static double rectangleArea(double width, double height)
{
double areaOfRectangle = width * height;
count++;
return areaOfRectangle;
}
//computes area of circle
public static double circleArea(double radius)
{
double areaOfCircle = pi * radius * radius;
count++;
return areaOfCircle;
}
//returns number of times the area computing methods were called
public static int getCallCount()
{
return count;
}
}
20120129
Java Project #9: Pay Raise
/**
* PayRaise computes pay raise and new salary for employees.
*
* @author (Andrew Samuels)
* @version (02-19-2010)
*/
//import scanner
import java.util.Scanner;
public class PayRaise
{
public static void main(String[] args)
{
//create variables
double currentSalary;
double payRaise;
double newSalary;
String word;
char performanceRating;
//create scanner
Scanner keyboard = new Scanner(System.in);
//capture current salary from user
System.out.print("Please enter current salary: ");
currentSalary = keyboard.nextDouble();
//capture performance rating from user
System.out.print("Please enter performance rating (A, B, C): ");
word = keyboard.next();
performanceRating = word.charAt(0);
//determine pay raise using switch/case
switch(performanceRating)
{
case 'A':
payRaise = currentSalary * .06;
newSalary = currentSalary + payRaise;
System.out.println("Pay raise is: " + payRaise);
System.out.println("New salary is: " + newSalary);
break;
case 'B':
payRaise = currentSalary * .04;
newSalary = currentSalary + payRaise;
System.out.println("Pay raise is: " + payRaise);
System.out.println("New salary is: " + newSalary);
break;
case 'C':
payRaise = currentSalary * .02;
newSalary = currentSalary + payRaise;
System.out.println("Pay raise is: " + payRaise);
System.out.println("New salary is: " + newSalary);
break;
default:
System.out.println("Invalid performance rating");
}
}
}
Java Project #8 : Tax Program
/**
* TaxProgram compute tax according to marital status and income.
*
* @author (Andrew Samuels)
* @version (02-19-2010)
*/
//import scanner
import java.util.Scanner;
public class TaxProgram
{
public static void main(String[] args)
{
//create variables
int income;
int taxAmount;
String maritalStatus;
//create scanner
Scanner keyboard = new Scanner(System.in);
//capture income from user
System.out.print("Please enter income: ");
income = keyboard.nextInt();
//capture marital status from user
System.out.print("Please enter marital status (single, married): ");
maritalStatus = keyboard.next();
//determine tax amount from marital status and income
if ((maritalStatus.equals("single") || maritalStatus.equals("Single")) && income < 30000)
{
taxAmount = income * 1/5;
System.out.println("Tax amount is: " + taxAmount);
}
else if ((maritalStatus.equals("single") || maritalStatus.equals("Single")) && income > 30000)
{
taxAmount = income * 1/4;
System.out.println("Tax amount is: " + taxAmount);
}
else if ((maritalStatus.equals("married") || maritalStatus.equals("Married")) && income < 50000)
{
taxAmount = income * 1/10;
System.out.println("Tax amount is: " + taxAmount);
}
else if ((maritalStatus.equals("married") || maritalStatus.equals("Married")) && income > 50000)
{
taxAmount = income * 3/20;
System.out.println("Tax amount is: " + taxAmount);
}
}
}
Java Project #7 : Student Grades (Upgraded!)
/**
* StudentGrades computes the grades of students in a class.
*
* @author (Andrew Samuels)
* @version (02-18-2010)
*/
//import scanner
import java.util.Scanner;
public class StudentGrades
{
public static void main(String[] args)
{
//create variables
int homeworkScore;
int midtermScore;
int finalexamScore;
double finalcourseScore;
//create scanner
Scanner keyboard = new Scanner(System.in);
//capture total homework score from user
System.out.print("Please enter total homework score (0-200): ");
homeworkScore = keyboard.nextInt();
//capture midterm score from user
System.out.print("Please enter midterm score (0-100): ");
midtermScore = keyboard.nextInt();
//capture final exam score from user
System.out.print("Please enter final exam score (0-100): ");
finalexamScore = keyboard.nextInt();
//determine final course score
finalcourseScore = (50*(homeworkScore/200.0) + 20*(midtermScore/100.0) + 30*(finalexamScore/100.0));
//print final course score
System.out.println("Final course score is: " + finalcourseScore);
//determine letter grade and meaning of the grade
if (finalcourseScore >= 90 && finalcourseScore <= 100)
{
System.out.println("Letter grade is: A");
System.out.println("You are: Distinctly above average");
}
else if (finalcourseScore >= 80 && finalcourseScore < 90)
{
System.out.println("Letter grade is: B");
System.out.println("You are: Above average");
}
else if (finalcourseScore >= 70 && finalcourseScore < 80)
{
System.out.println("Letter grade is: C");
System.out.println("You are: Average");
}
else if (finalcourseScore >= 60 && finalcourseScore < 70)
{
System.out.println("Letter grade is: D");
System.out.println("You are: Below average");
}
else if (finalcourseScore >= 0 && finalcourseScore < 60)
{
System.out.println("Letter grade is: E");
System.out.println("You are: Failed");
}
}
}
Java Project #6 : Points Distance
/**
* PointsDistance computes the distance between two points in the two dimensional plane.
*
* @author (Andrew Samuels)
* @version (02-04-2010)
*/
//import Scanner from library
import java.util.Scanner;
public class PointsDistance
{
public static void main(String[] args)
{
//create distance formula variables
double x1;
double y1;
double x2;
double y2;
double distanceBetweenPoints;
//Create Scanner
Scanner keyboard = new Scanner(System.in);
//capture x1 from user
System.out.print("Please enter x coordinate of first point: ");
x1 = keyboard.nextDouble();
//capture y1 from user
System.out.print("Please enter y coordinate of first point: ");
y1 = keyboard.nextDouble();
//capture x2 from user
System.out.print("Please enter x coordinate of second point: ");
x2 = keyboard.nextDouble();
//capture y2 from user
System.out.print("Please enter y coordinate of second point: ");
y2 = keyboard.nextDouble();
//calculate distance between points using distance forumula
distanceBetweenPoints = Math.sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
//print distance between the points
System.out.println("Distance between (" + x1 + ", " + y1 + ") and (" + x2 + ", " + y2 +") is: " + distanceBetweenPoints);
}
}
Java Project #5 : Bank Investment
/**
* BankInvestment computes the total money earned in an investment bank.
*
* @author (Andrew Samuels)
* @version (02-04-2010)
*/
//importing Scanner from library
import java.util.Scanner;
public class BankInvestment
{
public static void main(String[] args)
{
//create variables
int initialInvestmentMoney; //initial investment money in dollars
double interestRate; //interest rate in percentage
int numberOfYears; //number of years of investment
double totalMoneyEarnedDouble; //total money earned, double type, (converted to integer later)
//Create Scanner
Scanner keyboard = new Scanner(System.in);
//capture initial investment from user
System.out.print("Please enter initial investment (dollars): ");
initialInvestmentMoney = keyboard.nextInt();
//capture interest rate from user
System.out.print("Please enter interest rate (percent): ");
interestRate = keyboard.nextDouble();
//capture numbers of years of investment from user
System.out.print("Please enter years of investment (years): ");
numberOfYears = keyboard.nextInt();
//Calculate total money earned with formula p(1 + r/100)^n
totalMoneyEarnedDouble = initialInvestmentMoney*(Math.pow(1 + interestRate/100, numberOfYears));
//convert total money earned from double to integer
int totalMoneyEarned = (int)totalMoneyEarnedDouble;
//print total money earned
System.out.println("The total money earned (dollars): " + totalMoneyEarned);
}
}
20120128
Java Project #4: Travel Cost
/**
* TravelCost computes the cost of travel using a vehicle.
*
* @author (Andrew Samuels)
* @version (02-04-2010)
*/
//importing Scanner from library
import java.util.Scanner;
public class TravelCost
{
public static void main(String[] args)
{
//create variables
int travelDistance; //travel distance in miles
int gasolineUsage; //gasoline usage in miles per gallon
double gasolinePrice; //gasoline price in dollars per gallon
double totalTravelCost; //The total cost of traveling
//Create Scanner
Scanner keyboard = new Scanner(System.in);
//capture travel distance from user
System.out.print("Please enter travel distance (miles): ");
travelDistance = keyboard.nextInt();
//capture gas usage from user
System.out.print("Please enter gas usage of vehicle (miles per gallon): ");
gasolineUsage = keyboard.nextInt();
//capture gas price from user
System.out.print("Please enter gas price (dollars per gallon): ");
gasolinePrice = keyboard.nextDouble();
//Calculate
totalTravelCost = (travelDistance/gasolineUsage)*gasolinePrice;
//print total travel cost
System.out.println("The total travel cost (dollars): " + totalTravelCost);
}
}
Java Project #3 : Student Grade
/**
* StudentGrade determines the final semester score of students in a course.
*
* @author (Andrew Samuels)
* @version (02-01-2010)
*/
//import scanner class
import java.util.Scanner;
public class StudentGrade
{
public static void main(String[] args)
{
//initialize variables
int programs;
int homeworks;
int examinations;
double finalSemesterScore;
//create scanner
Scanner keyboard = new Scanner(System.in);
//input total program score from the user
System.out.print("Please enter total program score (0-200): ");
programs = keyboard.nextInt();
//input total homework score from the user
System.out.print("Please enter total homework score (0-500): ");
homeworks = keyboard.nextInt();
//input examination score from the user
System.out.print("Please enter examination score (0-100): ");
examinations = keyboard.nextInt();
//calculate final semester score
finalSemesterScore = 50*(programs*.005) + 30*(homeworks*.002) + 20*(examinations*.01);
//print final semester score
System.out.println("Final semester score is: " + finalSemesterScore);
}
}
Java Project #2 : Coinjar
Got spare change in the piggie jar? Coinjar is a Java script that determines the value of coins in a jar. Tell it how many quarters, dimes, nickels, and pennies you have and it will spit out the dollar value.
/**
* CoinJar determines the value of coins in a jar.
*
* @author (Andrew Samuels)
* @version (02-01-2010)
*/
//import scanner class
import java.util.Scanner;
public class CoinJar
{
public static void main(String[] args)
{
//create currency variables in pennies
int quarters = 25;
int dimes = 10 ;
int nickels = 5;
int pennies = 1;
//create variables for user number of change
int quartersNumber;
int dimesNumber;
int nickelsNumber;
int penniesNumber;
//create variables for value of change
int quartersTotal;
int dimesTotal;
int nickelsTotal;
int penniesTotal;
//variables for total value as double
int totalValue;
double dollarCents;
//create scanner
Scanner keyboard = new Scanner(System.in);
//input quarters from the user
System.out.print("Please enter number of quarters: ");
quartersNumber = keyboard.nextInt();
//input dimes from the user
System.out.print("Please enter number of dimes: ");
dimesNumber = keyboard.nextInt();
//input nickels from the user
System.out.print("Please enter number of nickels: ");
nickelsNumber = keyboard.nextInt();
//input pennies from the user
System.out.print("Please enter number of pennies: ");
penniesNumber = keyboard.nextInt();
//calculate quarters value
quartersTotal = quarters*quartersNumber;
//calculate dimes value
dimesTotal = dimes*dimesNumber;
//calculate nickels value
nickelsTotal = nickels*nickelsNumber;
//calculate pennies value
penniesTotal = pennies*penniesNumber;
//calculate total value in pennies
totalValue = quartersTotal + dimesTotal + nickelsTotal + penniesTotal;
//calculate total value as double in dollarCents ex. 2.19
dollarCents = totalValue*(.01);
//convert dollarCents to String for later use.
String dollarCentsStr;
dollarCentsStr = "" + dollarCents;
//convert to dollarCents into integer
int dollarCentsInt = (int)dollarCents;
//separate cents using substring
String number = dollarCentsStr;
String result;
result = number.substring(2);
//print total dollars and cents
System.out.println("Jar has " + dollarCentsInt + " dollars and " + result + " cents");
}
}
Java Project #1 : The Sphere Problem
This is a straightforward problem. This little ditty computes the volume and surface area of a sphere. Java is fun, no?
/**
* SphereProblem reads the radius of a sphere from the user and computes its volume and surface area, then prints them out..
*
* @author (Andrew Samuels)
* @version (02-01-2010)
*/
//import scanner class
import java.util.Scanner;
public class SphereProblem
{
public static void main(String[] args)
{
//initialize variables
double radius; //radius of a sphere
double volume; //volume of a sphere
double area; //area of a sphere
double PI = 3.1415;
//create scanner
Scanner keyboard = new Scanner(System.in);
//input radius from the user
System.out.print("Please enter radius of a sphere: ");
radius = keyboard.nextDouble();
//calculate volume
volume = (4/3)*PI*radius*radius*radius;
//calculate area
area = 4*PI*radius*radius;
//print volume
System.out.println("Volume of sphere is: " + volume);
//print area
System.out.println("Area of sphere is: " + area);
}
}
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