Prelim 1 Solutions



% Problem 1

-----------



1.1  a= 1   2   3

        4  4.5  5

        3   3   3





1.2  b= 0   10





1.3  c= 2  1  1





1.4  d= 3  5  6

	4  3  2





-----------------------------------------------------------------------------------------



% Problem 2

-----------



2.1 a= 0





2.2 b= 0





2.3 c= -1





2.4 d= -1





-----------------------------------------------------------------------------------------



% Probelm 3

-----------



weight = input('Enter weight:'); % Asuming non-negative or numerical input

                                           ____________    _________

%

%

code = input('Enter code: ');



while ~(code==1 | code==2)

      ____________________

	

	disp(['What?']);

	code = input('re-enter code: ');

end



 --------------------------------------

|%Determine charge		       | 	

|if weight <= 5                        |

|	charge=12;                     |  

|elseif weight < 10                    | 

|	charge=18;                     |

|else                                  |

|	charge=20 + (weight-10)*1.50;  |

|end                                   | 

 --------------------------------------



 --------------------------------------

|% Modify charge                       |

|if code==1                            |

|	charge = charge*1.08;	       |

|end                                   |

 --------------------------------------



-------------------------------------------------------------------------------------------



% Problem 4a

------------



g= abs( ev(2:n) - ev(1:n-1) )

   ___  _______   _________ 



max(g)

___ _



plot(ev)

     __



-------------------------------------------------------------------------------------------



% Problem 4b

------------



while current >= 0   % stop loop for negative values

              ____

	gradient= abs(current-previous) ;

                      _______ ________



	if gradient > maxGrad

           ________   _______

		

		maxGrad=gradient;

		elevL=previous;

		elevR=current;

	end



	% Update previous and read next input (current)



	previous = current;

        ________   _______

	

	current=input('Enter elev:');

	_______

end



% Output results

if maxGrad == 0

   _______    _

	

	disp(['Only one elevation entered or all elevations equal'])



else



	disp(['Steepest gradient of ' num2str(maxGrad) ...

					     _________



		' occurs between elevations ' ...

		

		num2str(elevL) ' and ' nem2str(elevR) ])

                        _____		       _____



end



---------------------------------------------------------------------------------------------