Homework  2


Download the problems here


Due date: 12th July before 4:00 PM



You would need the following files for your home work:











Description of the files:


trgIris.dat is an ascii file containing data for a classification problem. The first four columns contains the 4 features and the remaining

3 columns are the class labels.


wr.txt is also an ascii file. It contains data for regression problem, the first column is the x and the other one the y.


band1.irs, band2.irs, band3.irs and band4.irs are binary files containing a satellite image of Kolkata captured in 4 different

frequencies. All these files have 512 * 512 bytes and one byte represents 1 pixel. The data in this file can be transferred to a matrix of

integers using the following matlab commands:


fp = fopen('band1.irs','r');




You can use the following commands to display the images:


imagesc(a); colormap gray;



lena_std.pgm contains a 256 * 256 pixel image in the pgm format. You can read and display this image in matlab using the following commands:


>> a = imread('lena_std.pgm','pgm'); % reads the image in matrix a

>> imagesc(a); colormap gray; axis equal; % displays the image in a