Using two approaches, write the MATLAB code to compute the percentage of concuss

Question

Using two approaches, write the MATLAB code to compute the percentage of concussions overall (i.e., not classified by gender or sport) in the concuss.dat dataset. 2. Approach 1: Use a loop to iterate over each data record, incrementing tallies as appropriate. Approach 2: Do NOT use a loop. Instead, index into your matrix to define the relevant vectors. Then use a logical mask to identify the subset of interest. a. b. For both approaches, use an fprintf statement to produce this output: Overall, 0.0746% of the athletes sustained concussions Notes: 1) Be sure to load the data file into memory (once is sufficient) 2) You may NOT use MATLAB's sum function in Approach 1 3) To produce the % sign in fprintf, use %%. 4) Do NOT hard-code the 0.0746!! 5) Comments are NOT required. As a reminder, here are the first few records (rows) contained in the concuss.dat file. The columns, in order, represent sport, gender, year, concussion and count. 1 1997024930 1 1997 1 51 1 1 1998022887 1 1998 1 47

Explanation / Answer

%matlab code

result = [];
fid=fopen('concuss.dat');

while i < 10
    tline = fgetl(fid);
    if ~ischar(tline), break, end
    cellData = textscan(tline,'%d %d %d %d %d');
    matData = cell2mat(cellData);
    result = [result ; matData];
end
fclose(fid);

% Approach 1
total = length(result);
sumValue = 0;
for i=1:1:total
    if result(i, 4) == 0
        continue;
    else
        sumValue += 1;
    end  
end
percentage = (sumValue * 100.0) / total;
fprintf("Overall, %f of the athletes sustained concussions. ", percentage);

% Approach 2
sumValue = length(findstr(result(:,[4])==1, 1))
percentage = length(result);
fprintf("Overall, %f of the athletes sustained concussions. ", percentage);

Related Questions

Navigate

• Browse (All)
• Browse U
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.