fopen, fscanf, nested for loops

Check the file ID to determine if the file is available.

Only print message if file is not available.

Use nested for loops to read one water level value at a time into the lake_powell matrix.

lake_powell(month,year) = fscanf(fileID, '%f', 1);.

Use mean to determine the average elevation of the water level for each year and the overall average for the four-year period over which the data were collected. Print the yearly average vector and the overall average with labels as shown below.

%*****CONSTANT*****
 
fileID= fopen('lake_powell.txt');
lake_powell = fscanf(fileID, '%f', 1);
 
if exist('lake_powell.txt', 'file')
  % File exists.  Do stuff....
 
%*****INPUT*****
% read data file
years = ( 2013:1:2016 );
fprintf('\nLake Powell Water Levels (in feet)\n');
 
% if file doesn't exist
 
if exist('lake_powell.txt', 'file')
  % File exists.  Do stuff....
  
 
% print title and year column headings.
for i=1:length(years)
    fprintf('%6.0d\t', years(i));
end
% print contents of lake_powell
for i=1:size(lake_powell,1)
    fprintf('\n')
    for j=1:size(lake_powell,2)
        fprintf('%.2f\t',lake_powell(i,j));
    end 
end
fprintf('\n');
 
% PART B: use mean to determine average elevation 
fprintf('\n');
mean_each_year = mean(lake_powell,1);
fprintf('\n     Average for Each Year (in feet)\n');
 for i=1:length(years)
    fprintf('%9.0d',years(i)); 
fprintf('\n'); 
for i=1:length(mean_each_year)
    fprintf('%10.2f',mean_each_year(i));
end
end 
 overall_mean= mean(mean_each_year);
fprintf('\n   Overall average:%10.2f feet',overall_mean);
 else
    disp('File not found');
end 
 
 else
    disp('File not found');
end 

I'm supposed to have an output of

Average for Each Year (in feet)

2013 2014 2015 2016

3579.90 3585.70 3600.78 3602.36

Overall average: 3592.18 feet

but im getting

Average for Each Year (in feet)

2013

3594.38 2014

3594.38 2015

3594.38 2016

3594.38

Overall average: 3594.38 feet

[Image Analyst]

You forgot to attach 'lake_powell.txt'