mat lab hw

ENGR 1120 – PROGRAMMING FOR ENGINEERS (MATLAB)

Homework Program #2

Objectives: Demonstrate knowledge of data files, vector variables, intrinsic functions, subscript

manipulation, for loops, and plotting in MATLAB.

You have been given a set of ASCII data files that contain directions for laying out

patterns in a field. The data files contain in the first column a distance to travel and in the second

column a direction heading. Unfortunately, the person who created the data did not have a good

understanding of orienteering and the direction headings are given as referenced to a clock face.

The pattern begins at the origin of a Cartesian coordinate system with the person facing 12

o’clock, see the figure below. The figure shows an example of the first step in the pattern being

a distance of 1.5 feet in the direction of 7 o’clock. All direction headings are given in terms of

this clock orientation. The

distance values given are in

feet. There are 5 data files

provided online for testing of

the program.

Write a script file that

will allow the user to input

from the keyboard the

filename of the file that they

wish to analyze. Load only

that ONE data file and plot

the resulting pattern. Once

each point forming the pattern

has been located, find and

designate on the plot which of

the resulting nodes was the

farthest away from the origin. Also find and designate the center of the pattern as defined to

occur at the coordinate location corresponding to (average x, average y). When plotting the

resulting pattern on the Cartesian coordinate system, set the axes limits to appropriate values.

HINT: Correlate the direction headings provided in the data files to a Cartesian coordinate

system by using the following vector in your script file. This requires subscript manipulation.

angle = [60; 30; 0; 330; 300; 270; 240; 210; 180; 150; 120; 90]

-2 -1.5 -1 -0.5 0 0.5 1 1.5 2

-2

-1.5

-1

-0.5

0

0.5

1

1.5

2 1

2

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