Question

5 matlab codes

18, Suppose I seed to fetch a mmumerical variable named hours from the user This vaniable needs to be son-orgative Ioe the emaining code in the projert to work property. so before So, we will got the vue of hours fromm the user, and if it is segative, we will tell the user that it ut be non-aegative, and reprompt for a value We will hoep doing this until the uer gots it correct Give the code lor the enkire probdenm 19 Suppose we know that a certain array fib will hold N values event ually (after some computation) and that the value of N is already assigsed. Give the matlab code for "preallocating" storage for the array fib, as as N by I column vectoe, hiding the output from this commabd 20. Suppose we want to compute N terms in a Fibonacci sequence but using the first two terms in the sequence being set by the user The Fibonari sequence is defined as for ii 2 2 Assume that N has already been gotten from the user, and that it is greater than or equal to 2. Give the command for "preallocating" storage for the array fib as an N tby I column vector. Hide the output. Also assume that the frst two teems have been fetched from the user, and have berm assigsed to ib(1) and ib(2) What matlab programming structure should be used for this task

Answer 1

18.

% prompt the user for the value of hours
hours = input('Enter value of hours (>= 0) : ');

% validate hours to be non-negative
while(hours < 0)
fprintf('Hours must be non-negative\n'); % if negative, display error
hours = input('Enter value of hours (>= 0) : '); % reprompt for hours
end

19.

fib = zeros(N,1); % preallocates storage for fib as N by 1 column vector

20.

fib = zeros(N,1); % preallocates storage for fib as N by 1 column vector

fib(1) = input('Enter value of fib(1) : '); % prompt for input for fib(1) value and assign it
fib(2) = input('Enter value of fib(2) : '); % prompt for input for fib(2) value and assign it