How do i fix the error in this code?

clc
clear all
close all

m = true;
while m;
disp ('Extra Credit \n');
m = input ('Select which homework assignment to view: \n 1. Assignment 1 \n 2. Assignment 2 \n 3. Assignment 3 \n 4. Assignment 4 \n 5. Exit')
switch (m)
    case 1
disp('Problem 1a');
(((35.7)*(64))-(7^3))/(45+(5^2))
disp('Problem 1b');
(5/4)*7*(6^2)+((3^7)/((9^3)-652))
disp('Problem 2a');
((2+7)^3)+(((273)^(2/3))/2)+((55^2)/3)
disp('Problem 2b');
(2^3)+(7^3)+((273^3)/2)+(55^(3/2))
disp('Problem 3a');
((cos((5*pi)/6)).^2)*((sin(7*pi/8)).^2)+((tan(((pi/6)*(log(8)))))/(sqrt(7)))
disp('Problem 3b');
(cos((5*pi)/(6)).^2)*((sin((7*pi)/(8))).^2)+((tan((pi/6)*(log(8)))/((7)*(5/2))))
disp('Problem 4a');
x=13.5
(x^3)+(5*(x^2))-(26.7*x)-(52)
disp('Problem 4b');
x=13.5
(sqrt(14*(x.^3)))/(exp(3*x))
disp('Problem 4c');
x=13.5
log((x.^2)-(x.^3))
disp('Problem 5a');
a=3
b=6
c=2
d=(.5)*((a*b)-(c))
disp('Problem 5b');
(d*(exp(d/2)))+((((a*d)+(c*d))/((20/a)+(30/b)))/(a+b+c+d))
disp('Problem 6');
a = [1,-2,-1,2];
roots(a)
disp('Problem 7');
x = 0:0.1:(2*pi);
y = (3*sin((1/2)*x));
figure(1),plot(x,y),xlabel('x'),ylabel('y')
disp('displaying in figure 1');
disp('Problem 8');
x = 0:0.1:(2*pi);
y = ((1/2)*cos(3*x));
figure(2),plot(x,y),xlabel('Radians'),ylabel('Amplitude')
disp('displaying 0.1 increment in figure 2');
x = 0:0.5:(2*pi);
y = ((1/2)*cos(3*x));
figure(3),plot(x,y),xlabel('Radians'),ylabel('Amplitude')
disp('displaying 0.5 increment in figure 3');
disp('Problem 9');
x = -1.2:0.062:5;
y = ((1/2)*cos(3*x))+ (3*(sin((1/2)*x)));
figure(4),plot(x,y),xlabel('x'),ylabel('y')
disp('displaying in figure 4');
disp('Problem 10');
A=[1,1,0;1,-3,0;2,1,3];
B=[6;7;15];
Solution = A/B
di
    case 2
disp('Problem 1');
c = [32, 4, exp(2.5), 63, cos(pi/3), 14.12]
disp('Problem 2');
k = [55; 14; log(51); 987; 0; (5*(sin((2.5)*pi)))]
disp('Problem 3');
m = 15:-5:-25 
disp('Problem 4');
Afirst = 4:3:49 
r = Afirst(:,1:4);
w = Afirst(:,13:16);
Asecond = [r,w]
disp('Problem 5a');
A = [6, 43, 2, 11, 87; 12, 6, 34, 0, 5; 34, 18, 7, 41,9]
va = A(2,1:5)
disp('Problem 5b');
A = [6, 43, 2, 11, 87; 12, 6, 34, 0, 5; 34, 18, 7, 41,9]
vb = A(1:3,4)
disp('Problem 5c');
A = [6, 43, 2, 11, 87; 12, 6, 34, 0, 5; 34, 18, 7, 41,9]
vc = A(1:2,1:5)
disp('Problem 5d');
A = [6, 43, 2, 11, 87; 12, 6, 34, 0, 5; 34, 18, 7, 41,9]
b = A(:,2);
c = A(:,5);
vd = [b,c]
disp('Problem 6a');
a = [zeros(2,5)]
disp('Problem 6b');
b = [ones(0,1);eye(4)]
disp('Problem 6c');
c = [ones(1,2);ones(1,2);ones(1,2)]
disp('Problem 7a');
A = [ones(0,1);eye(7)]
disp('Problem 7b');
A = [ones(0,1);eye(7)]
disp('Problem 8');
x = -2.5:.5:3
y = ((1+x.^2).^3).*(x.^3)
disp('Problem 9');
h = .9
k = 12.5
y = .9, .8, .7, .6
z = 2.5, 3, 3.5, 4
T = ((x.*y.*z)/((h+k).^(k/5)))+((k.*(exp((z./x)+y)))/(z.^(h)))
disp('Problem 10a');
n = (0:1:50);
x = (1)./(((2.*n)+1).*((2.*n+2)))
sum((1)./(((2.*n)+1).*((2.*n+2))))
disp('Problem 10b');
n = (0:1:500);
x = (1)./(((2.*n)+1).*((2.*n+2)))
sum((1)./(((2.*n)+1).*((2.*n+2))))
disp('Problem 10c');
n = (0:1:5000);
x = (1)./(((2.*n)+1).*((2.*n+2)))
sum((1)./(((2.*n)+1).*((2.*n+2))))

      case 3
  clc
  clear all
  close all 
  disp('Problem 1');
  x = -10:0.1:10
  F = ((1.5).*x)./(x-4)
  x1 = -10:0.1:3.7
  x2 = 4.3:0.1:10
  y1 = ((1.5).*x1)/(x1-4)
  y2 = ((1.5).*x2)/(x2-4)
  plot (x,F,x1,y1,x2,y2);
  xlabel('X')
  ylabel('Y')
  title('Problem 1')
  disp('Problem 2');
  R1 = 1:1:10 % Load Resistance, Ohms
  Vs = 12 % Voltage Source, Volts
  Rs = 2.5 % Internal Resistance, Ohms
  P = ((Vs.^2).*R1)./((R1+Rs).^2)
  plot(R1,P);
  xlabel('Low Resistance(Ohms)')
  ylabel('Power(Watts)')
  disp('Problem 3');
  P = 5000;
  T = 15;
  R = .075;
  M1 = 0:1:15;
  M2 = 0:0.25:15;
  V1 = P.*(1+(R./M1)).^(M1.*T)
  V2 = P.*(1+(R./M2)).^(M2.*T)
  V3 = P.*exp(R.*T)
  figure(3),loglog(M1,V1,'g',M2,V2,'r--',M1,V3,'o')
  legend('Annual Compound','Quarter Compound','Continuous Compound')
  disp('Problem 4');
  x = [0.00007, 0.0002, 0.05, 0.8, 4.2, 215, 3500];
  y = [345, 362, 419, 454, 485, 633, 831];
  yld = 350.*[((x./210).^0.16)+1];
  figure
  plot(x,y,'*',x,yld,'--');
  set(gca, 'xscale','log');
  set(gca, 'yscale','linear');
  xlabel('Strain Rate')
  ylabel('Yield Stress')
  title('Strain and Yield')
  legend('Coordinate for Strain Rate(x) and Yield Stress(y)', 'Function of Yield Stress', 'Location', 'Northwest')

      case 4
  disp('Problem 1');
  x = [3 1 2 5 4]
  find (x > 2)
  y = x(x < 4)
  disp('Problem 2');
  a = [0,2,1;3,1,0;4,5,4;2,0,2]
  a ==0
  a(a >= 4)= -1
  disp('Problem 3');
  x = [5,-3,0,0,8]
  y = [2,4,0,5,7]
  z = x|y
  z = x(x <= 0)
  disp('Problem 4');
  TNY = [31,26,30,33,33,39,41,41,34,33,45,42,36,39,37,45,43,36,41,37,32,32,35,42,38,33,40,37,36,51,50]
  TANC = [37,24,28,25,21,28,46,37,36,20,24,31,34,40,43,36,34,41,42,35,38,36,35,33,42,42,37,26,20,25,31]
  A = (sum(TNY))/31
  B = (sum(TANC))/31
  length(find(TNY < A))
  length(find(TANC < B))
  length(find(TANC > TNY))
  find(TANC > TNY)
  length(find(TANC == TNY))
  find(TANC == TNY)
  fprintf('\nAverage temperature for New York City is %f,((sum(TNY))/31)')
  fprintf('\nAverage temperature for Anchorage is %f,((sum(TANC))/31)')
  fprintf('\nThere were 17 day(s) where the temperature was below average in New York City')
  fprintf('\nThere were 13 day(s) where the temperature was below average in Anchorage')
  fprintf('\nThere were 11 day(s) where the temperatue in Anchorage was higher than the temperature in New York City')
  fprintf('\nThese were the days: 17 9 14 15 18 19 21 22 25 26 ')
  fprintf('\nThere were 1 day(s) where the temperature in Anchorage and New York City were the same')
  fprintf('\nThese were the days: 23')
  fprintf('\nThere were 16 day(s) where the temperature in Anchorage and New York City were above freezing')
  fprintf('\nThese were the days: 7 8 9 13 14 15 16 17 18 19 20 23 24 25 26 27')
  disp('Problem 6');
  x = -10:2:10;
  y = zeros(1, length(x));
  k = 1
  for i =x
      if -6 <= i & i <= 2
      y(k) = 4*exp(i+2);
  else if -2 <= i & i <= 2
          y(k) = x^2;
      else if 2 <= i & i <= 6;
              y(k) = (i + 62)^(1/3);
          else
              y(k) = 0;
          end
          k = k + 1;
      end
   plot(x,y),xlabel('x'),ylabel('y')

   case 5
       disp('Thank you for using this Assignment Program.')
       break
      end
      c = input('Would you like to continue? Press Y for yes and N for no','s')
      if c == 'Y' | c == 'y'
          a == true
      else
          break
      end
  end

end

[Guillaume]

When asking for help about an error, post the full error message, including the line at which it occurs.

And rather than dumping pages of unformatted code, post the minimum necessary to reproduce the error.

[Stephen23]

Diuplicate:

http://www.mathworks.com/matlabcentral/answers/283263-how-do-i-fix-the-error-in-this-code-i-says-illegal-use-of-reserved-keyword-case

Answer 1

[Weird Rando]

The format of the code was so bad that your end case were mixed with the for loop and if statement. Anyway fixed if for you.

clc
clear all
close all

m1 = true;

while m1;
disp ('Extra Credit');
m = input ('Select which homework assignment to view: \n 1. Assignment 1 \n 2. Assignment 2 \n 3. Assignment 3 \n 4. Assignment 4 \n 5. Exit')

switch (m)
case 1
disp('Problem 1a');
(((35.7)*(64))-(7^3))/(45+(5^2))
disp('Problem 1b');
(5/4)*7*(6^2)+((3^7)/((9^3)-652))
disp('Problem 2a');
((2+7)^3)+(((273)^(2/3))/2)+((55^2)/3)
disp('Problem 2b');
(2^3)+(7^3)+((273^3)/2)+(55^(3/2))
disp('Problem 3a');
((cos((5*pi)/6)).^2)*((sin(7*pi/8)).^2)+((tan(((pi/6)*(log(8)))))/(sqrt(7)))
disp('Problem 3b');
(cos((5*pi)/(6)).^2)*((sin((7*pi)/(8))).^2)+((tan((pi/6)*(log(8)))/((7)*(5/2))))
disp('Problem 4a');
x=13.5
(x^3)+(5*(x^2))-(26.7*x)-(52)
disp('Problem 4b');
x=13.5
(sqrt(14*(x.^3)))/(exp(3*x))
disp('Problem 4c');
x=13.5
log((x.^2)-(x.^3))
disp('Problem 5a');
a=3
b=6
c=2
d=(.5)*((a*b)-(c))
disp('Problem 5b');
(d*(exp(d/2)))+((((a*d)+(c*d))/((20/a)+(30/b)))/(a+b+c+d))
disp('Problem 6');
a = [1,-2,-1,2];
roots(a)
disp('Problem 7');
x = 0:0.1:(2*pi);
y = (3*sin((1/2)*x));
figure(1),plot(x,y),xlabel('x'),ylabel('y')
disp('displaying in figure 1');
disp('Problem 8');
x = 0:0.1:(2*pi);
y = ((1/2)*cos(3*x));
figure(2),plot(x,y),xlabel('Radians'),ylabel('Amplitude')
disp('displaying 0.1 increment in figure 2');
x = 0:0.5:(2*pi);
y = ((1/2)*cos(3*x));
figure(3),plot(x,y),xlabel('Radians'),ylabel('Amplitude')
disp('displaying 0.5 increment in figure 3');
disp('Problem 9');
x = -1.2:0.062:5;
y = ((1/2)*cos(3*x))+ (3*(sin((1/2)*x)));
figure(4),plot(x,y),xlabel('x'),ylabel('y')
disp('displaying in figure 4');
disp('Problem 10');
A=[1,1,0;1,-3,0;2,1,3];
B=[6;7;15];
Solution = A/B
di
case 2
disp('Problem 1');
c = [32, 4, exp(2.5), 63, cos(pi/3), 14.12]
disp('Problem 2');
k = [55; 14; log(51); 987; 0; (5*(sin((2.5)*pi)))]
disp('Problem 3');
m = 15:-5:-25 
disp('Problem 4');
Afirst = 4:3:49 
r = Afirst(:,1:4);
w = Afirst(:,13:16);
Asecond = [r,w]
disp('Problem 5a');
A = [6, 43, 2, 11, 87; 12, 6, 34, 0, 5; 34, 18, 7, 41,9]
va = A(2,1:5)
disp('Problem 5b');
A = [6, 43, 2, 11, 87; 12, 6, 34, 0, 5; 34, 18, 7, 41,9]
vb = A(1:3,4)
disp('Problem 5c');
A = [6, 43, 2, 11, 87; 12, 6, 34, 0, 5; 34, 18, 7, 41,9]
vc = A(1:2,1:5)
disp('Problem 5d');
A = [6, 43, 2, 11, 87; 12, 6, 34, 0, 5; 34, 18, 7, 41,9]
b = A(:,2);
c = A(:,5);
vd = [b,c]
disp('Problem 6a');
a = [zeros(2,5)]
disp('Problem 6b');
b = [ones(0,1);eye(4)]
disp('Problem 6c');
c = [ones(1,2);ones(1,2);ones(1,2)]
disp('Problem 7a');
A = [ones(0,1);eye(7)]
disp('Problem 7b');
A = [ones(0,1);eye(7)]
disp('Problem 8');
x = -2.5:.5:3
y = ((1+x.^2).^3).*(x.^3)
disp('Problem 9');
h = .9
k = 12.5
y = .9, .8, .7, .6
z = 2.5, 3, 3.5, 4
T = ((x.*y.*z)/((h+k).^(k/5)))+((k.*(exp((z./x)+y)))/(z.^(h)))
disp('Problem 10a');
n = (0:1:50);
x = (1)./(((2.*n)+1).*((2.*n+2)))
sum((1)./(((2.*n)+1).*((2.*n+2))))
disp('Problem 10b');
n = (0:1:500);
x = (1)./(((2.*n)+1).*((2.*n+2)))
sum((1)./(((2.*n)+1).*((2.*n+2))))
disp('Problem 10c');
n = (0:1:5000);
x = (1)./(((2.*n)+1).*((2.*n+2)))
sum((1)./(((2.*n)+1).*((2.*n+2))))
      case 3
  clc
  clear all
  close all 
  disp('Problem 1');
  x = -10:0.1:10
  F = ((1.5).*x)./(x-4)
  x1 = -10:0.1:3.7
  x2 = 4.3:0.1:10
  y1 = ((1.5).*x1)/(x1-4)
  y2 = ((1.5).*x2)/(x2-4)
  plot (x,F,x1,y1,x2,y2);
  xlabel('X')
  ylabel('Y')
  title('Problem 1')
  disp('Problem 2');
  R1 = 1:1:10 % Load Resistance, Ohms
  Vs = 12 % Voltage Source, Volts
  Rs = 2.5 % Internal Resistance, Ohms
  P = ((Vs.^2).*R1)./((R1+Rs).^2)
  plot(R1,P);
  xlabel('Low Resistance(Ohms)')
  ylabel('Power(Watts)')
  disp('Problem 3');
  P = 5000;
  T = 15;
  R = .075;
  M1 = 0:1:15;
  M2 = 0:0.25:15;
  V1 = P.*(1+(R./M1)).^(M1.*T)
  V2 = P.*(1+(R./M2)).^(M2.*T)
  V3 = P.*exp(R.*T)
  figure(3),loglog(M1,V1,'g',M2,V2,'r--',M1,V3,'o')
  legend('Annual Compound','Quarter Compound','Continuous Compound')
  disp('Problem 4');
  x = [0.00007, 0.0002, 0.05, 0.8, 4.2, 215, 3500];
  y = [345, 362, 419, 454, 485, 633, 831];
  yld = 350.*[((x./210).^0.16)+1];
  figure
  plot(x,y,'*',x,yld,'--');
  set(gca, 'xscale','log');
  set(gca, 'yscale','linear');
  xlabel('Strain Rate')
  ylabel('Yield Stress')
  title('Strain and Yield')
  legend('Coordinate for Strain Rate(x) and Yield Stress(y)', 'Function of Yield Stress', 'Location', 'Northwest')
      case 4
  disp('Problem 1');
  x = [3 1 2 5 4]
  find (x > 2)
  y = x(x < 4)
  disp('Problem 2');
  a = [0,2,1;3,1,0;4,5,4;2,0,2]
  a == 0
  a(a >= 4)= -1
  disp('Problem 3');
  x = [5,-3,0,0,8]
  y = [2,4,0,5,7]
  z = x|y
  z = x(x <= 0)
  disp('Problem 4');
  TNY = [31,26,30,33,33,39,41,41,34,33,45,42,36,39,37,45,43,36,41,37,32,32,35,42,38,33,40,37,36,51,50]
  TANC = [37,24,28,25,21,28,46,37,36,20,24,31,34,40,43,36,34,41,42,35,38,36,35,33,42,42,37,26,20,25,31]
  A = (sum(TNY))/31
  B = (sum(TANC))/31
  length(find(TNY < A))
  length(find(TANC < B))
  length(find(TANC > TNY))
  find(TANC > TNY)
  length(find(TANC == TNY))
  find(TANC == TNY)
  fprintf('\nAverage temperature for New York City is %f,((sum(TNY))/31)')
  fprintf('\nAverage temperature for Anchorage is %f,((sum(TANC))/31)')
  fprintf('\nThere were 17 day(s) where the temperature was below average in New York City')
  fprintf('\nThere were 13 day(s) where the temperature was below average in Anchorage')
  fprintf('\nThere were 11 day(s) where the temperatue in Anchorage was higher than the temperature in New York City')
  fprintf('\nThese were the days: 17 9 14 15 18 19 21 22 25 26 ')
  fprintf('\nThere were 1 day(s) where the temperature in Anchorage and New York City were the same')
  fprintf('\nThese were the days: 23')
  fprintf('\nThere were 16 day(s) where the temperature in Anchorage and New York City were above freezing')
  fprintf('\nThese were the days: 7 8 9 13 14 15 16 17 18 19 20 23 24 25 26 27')
  disp('Problem 6');
  x = -10:2:10;
  y = zeros(1, length(x));
  k = 1
  for i =x
      if -6 <= i & i <= 2
      y(k) = 4*exp(i+2);
  else if -2 <= i & i <= 2
          y(k) = x^2;
      else if 2 <= i & i <= 6;
              y(k) = (i + 62)^(1/3);
          else
              y(k) = 0;
          end
          k = k + 1;
      end
      end
  end
   plot(x,y),xlabel('x'),ylabel('y')
   case 5
       disp('Thank you for using this Assignment Program.')
       m1 = false;
      end
      c = input('Would you like to continue? Press Y for yes and N for no','s')
      if c == 'Y' | c == 'y'
          a == true
      else
          break
      end
  end