# Homework 3: Functions

## Instructions

Send me an email containing an .R file with all three functions defined. At the end of the .R file, write a short set of statements that give example uses of the functions (in other words, the tests that demonstrate they work!). Document in comments the expected output. I should be able to run the entire file in R with a clean environment, i.e. if I put `rm(list=ls())`

at the top of the file.

## Function: euclideanDist

Write a function called euclideanDist that will accept x and y coordinates for two points and return the Euclidean distance between them. Donâ€™t be concerned about error-checking arguments, but be careful about format and readability.

# euclideanDist: Returns the euclidean distance between two points, # each specified by x and y coordinates. # # Args: # p1 = 2-element vector [x1,y1] containing the coordinates of the # first point. # p2 = 2-element vector [x2,y2] containing the coordinates of the # second point. # Returns a scalar: # distance between points.

## Function lineParams:

Write a function, `lineParams`

that calculates the slope and intercept of a straight line connecting two points, given the two points P1 and P2.

## lineParams: Given the (x,y) coordinates of two points, finds the # slope and intercept of the line connecting the points. # # Args: # point1 = 2-element vector containing x,y coordinates for point 1. # point2 = 2-element vector containing x,y coordinates for point 2. # Returns a list containing: # slope = slope of the resulting line. # intercept = Y-intercept of the resulting line.

## Function decomposeTime

Write a function that decomposes a single input value in seconds into days + hours + minutes + residual seconds. Decide how the function should return the values. What should the function do if the input value is negative? I have not supplied a comment header for this function, create your own. Review the modulo operator (`%%`

) and integer division operator (`%/%`

).