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--- matlab:asciunqoc [2016/05/02 00:09] – mithat
+++ matlab:asciunqoc [2021/05/03 02:10] – mithat
@@ Line 1: / Line 1: @@
-====== MATLAB exercise solutions ======
+====== MATLAB exercise solutions (Century College, CSCI 1081, Spring 2021) ======
-Century College CSCI 1081
-Spring 2016
 <file matlab ex1.m>
@@ Line 11: / Line 9: @@
 <file matlab ex2.m>
-% not provided, but it's solvable!
+% not provided.
 </file>
 <file matlab ex3a.m>
-a = [2,  3,  1,  5; 1,  0,  3,  1,; 0,  2, -3,  2; 0,  2,  3,  1,];
+a = [2 3 1 5; 1 0 3 1; 0 2 -3 2; 0 2 3 1];
 % either works for multiplying a matrix with a scalar:
 disp(a * 7);
@@ Line 22: / Line 20: @@
 <file matlab ex3b.m>
-a = [2,  3,  1,  5; 1,  0,  3,  1,; 0,  2, -3,  2; 0,  2,  3,  1,];
+a = [2 3 1 5; 1 0 3 1; 0 2 -3 2; 0 2 3 1];
 b = inv(a);
 disp(a * b); % result is (approx.) identity matrix
@@ Line 28: / Line 26: @@
 <file matlab ex3c.m>
-a = [2,  3,  1,  5; 1,  0,  3,  1,; 0,  2, -3,  2; 0,  2,  3,  1,];
+a = [2 3 1 5; 1 0 3 1; 0 2 -3 2; 0 2 3 1];
-b = [ 1,2,3; 10,20,30;.1,.2,.3];
+b = [1 2 3; 10 20 30; 0.1 0.2 0.3];
 matrixinfo(a);
 matrixinfo(b); % square matrix of Inf values
@@ Line 38: / Line 36: @@
 % matrix_info(m)
 % Tell the user whether mtx is a square matrix. If it is a square matrix,
-% tell the user the matrix's transpose, whether the matrix is invertible,
+% display the matrix's transpose and inverse.
-% and if it is invertible what the inverse matrix is.
 msize = size(m);
@@ Line 55: / Line 52: @@
 </file>
-<file matlab ex.m>
+<file matlab Ch7PC5.m>
+% Input data for three monkeys
+NUM_MONKEYS = 3;
+NUM_DAYS = 5;
+% initialize data to -1)
+data = ones(NUM_MONKEYS, NUM_MONKEYS) * -1;
+% Get monkey data
+for monkey = 1:NUM_MONKEYS,
+    disp('----------');
+    % enter row data as days of week
+    for day = 1:NUM_DAYS,
+        is_valid = false;
+        while ~is_valid,
+            prompt = ['Monkey ' num2str(monkey) ', day ' num2str(day) ': '];
+            data(monkey, day) = input(prompt);
+            is_valid = data(monkey, day) >= 0;
+            if ~is_valid,
+                disp('Try again.');
+            end; % if
+        end % while
+    end % inner for
+end % outer for
+% for each column, compute the average:
+avgeaten = zeros(1, NUM_DAYS);
+for day = 1:NUM_DAYS,
+    avgeaten(day) = mean(data(:, day));
+end % for
+% Display report
+disp('=====================================');
+disp('The average amount eaten on each day:');
+disp(avgeaten);
+disp(['The least amount eaten this week: ' num2str(min(min(data))) ]);
+disp(['The greatest amount eaten this week: ' num2str(max(max(data))) ]);
+disp('=====================================');
 </file>