Question

using matlab

3. Write a script that will read the ages vector.dat file created in the previous problem. - the script will print the number of persons in the group - the script will print the maximum and minimum ages in the group - the script will compute and print the "average age" The script should return something like: The file contains the ages of a group of 50 people The maximum and minimum ages in the group are 10 and 38 The average age is: 18.2 years old Additionally: - the script will call a function graph_function - the function will take as an input the information contained in the ages_vector.dat file - the function will round the ages - the function will create a "bar plot showing person vs. age. - plot the average age using, for example, redt add labels and legends describing the figure The graph should be something like: bewusthing like gedach ponon in the go

Answer 1

% Matlab script to read a file containing ages of a group of people and
% then determine the number of people in the group, the maximum, minimum
% and average age of people in the group and then plot a graph of the ages

% open the file
fid = fopen('ages_vector.dat');
% read the ages into the vector ages ([1,inf] means each row contains 1
% data for age and inf is to read till the end of file)
ages = fscanf(fid,'%d',[1,inf])';
fclose(fid); %close the file

% display the statistics
fprintf('The file contains the ages of %d people\n',length(ages));
fprintf('The maximum age and minimum age in the group are %d and %d\n',max(ages),min(ages));
fprintf('The average age is %.2f years old\n',mean(ages));
graph_function(ages); % call the function to plot the graph

function graph_function(ages)
% Matlab function that receives as input the ages vector and plots the
% age of each people and the average age
ages = round(ages); % round the ages of the people
bar(ages); % plot the age of each person
hold on; % hold the current graph
% plot the average age
plot((1:length(ages)),mean(ages)*ones(1,length(ages)),'r+');
hold off; % release the current graph
legend('age','average'); % specify the legend
% specify the x-axis and y-axis labels
xlabel('each one of the person in the group');
ylabel('corresponding age');
% specify the title
title('The age of each person in the group');
end
%end of function

%end of script

Output:

Input file:

Each line in the input file contains 1 age

30 25 18 26 12 38 34 19 26 29 23 18 27 30 25 16 10 23 35 20 18 19 15 12 38 35

NEW WNNNW WWEHENENNWNNWN oo www o o o Віл о л о оо оо л шоо олоо

Output:

The file contains the ages of 50 people The maximum age and minimum age in the group are 38 and 10 The average age is 24.38 years old Figure 1 Eile Edit View Insert Tools Desktop Window Help The age of each person in the group + age average HHHHHHHHHH corresponding age 0 5 10 15 20 25 30 35 40 each one of the person in the group 45 50