2021 Update

Lesson1/Lesson 1 Wrap-up.m

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+hundred=0.1/(9.58/(60*60))
+marathon=42.195/(2+(1/60)+(39/(60*60)))

Lesson1/MATLAB Calculation.m

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+borrowed = 1000
+
+rate = 0.1
+
+first_year_debt=borrowed*rate+borrowed
+
+debt=first_year_debt+first_year_debt*rate

Lesson2/Colon Operator.m

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+odds=1:2:100
+evens=100:-2:1

Lesson2/Matrix Arithmetic.m

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+A = [1:5; 6:10; 11:15; 16:20];
+
+b=[1 1 1 1]
+c=[1;1;1;1;1]
+result=b*A*c

Lesson2/Matrix Indexing.m

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+A = [1:5; 6:10; 11:15; 16:20];
+v=A(:,2)
+A(end,:)=0

Lesson3/A Simple Function.m

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+function a= tri_area(base,hight)
+a=0.5*base*hight;
+end

Lesson3/Lesson 3 Wrap-up.m

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+function fare= taxi_fare(dist_km,time_min)
+fare=5+(2*(ceil(dist_km)-1))+(0.25*ceil(time_min));

Lesson3/Multiple Outputs.m

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+function [tl,tr,bl,br]= corners(ip)
+tl=ip(1,1);
+tr=ip(1,end);
+bl=ip(end,1);
+br=ip(end,end);

Lesson4/Built-in functions.m

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+function [mmr,mmm] = minimax(M)
+mmr=abs(max(M,[],2)-min(M,[],2))';
+mmm=(max(M,[],'all')-min(M,[],'all'));

Lesson4/Lesson 4 Wrap-up.m

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+function T=trio(m,n)
+a=ones(m,n);
+b=2*ones(m,n);
+c=3*ones(m,n);
+T=[a;b;c]

lesson5/If-statement practice.m

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+function out= picker(condition, in1, in2)
+if condition
+    out= in1;
+else 
+    out=  in2;
+
+end
+
+out = picker(true,1,2)
+out = picker(false,1,2)

lesson5/Lesson 5 Wrap-up.m

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+function isvalid = valid_date(y, m, d)
+   % Check if the inputs are valid 
+   % Check that they are scalars
+   if ~(isscalar(y) && isscalar(m) && isscalar(d))
+       isvalid = false;
+   % Check that inputs are positive
+   elseif ~all([y, m, d] > 0)
+       isvalid = false;
+   % Check that inputs are integers (not the data type)    
+   elseif any(rem([y, m, d], 1))
+       isvalid = false;
+   % Check that m and d are below the max possible
+   elseif (m > 12) || (d > 31)
+       isvalid = false;
+   % The inputs could be a valid date, let's see if they actually are
+   else
+       % Vector of the number of days for each month
+       daysInMonth = [31 28 31 30 31 30 31 31 30 31 30 31];
+       % If leap year, change days in Feb
+       if isequal(rem(y, 4), 0) && (~isequal(rem(y, 100), 0) || isequal(rem(y, 400), 0))
+            daysInMonth(2) = 29;
+       end
+       maxDay = daysInMonth(m);
+       if d > maxDay
+           isvalid = false;
+       else
+           isvalid = true;
+       end
+
+   end
+end

lesson5/More practice.m

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+function admit= eligible(v,q)
+if (((v+q)/2) >=92 && ((q>88) && (v>88)))
+    admit= true ;
+else
+    admit = false;
+end
+

lesson5/nargin.m

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+function too_young = under_age (age,limit)
+if nargin==1
+    too_young= age<21;
+else
+    too_young= age<limit;
+end