Matlab DebuggingSolutionThis function calculates the end val

Matlab Debugging

Solution

%This function calculates the end values of a set of accounts, a schedule
%of depositsgiven a set of monthly gain rates (interest rates). Rates can
%be positive or negative.
%accountRates and deposits are of dimensions timexnumAccounts, where time
%is the number of months the account is active for and numAccounts is the
%number of of elements in accounts.

function [accounts, totalGained, totalMoney] = rec7prob4(accounts,deposits,accountRates)

[time, numAccounts] = size(accountRates);
[time2, numDeposits] = size(deposits);
  
%This is an example of you you can create your own errors. We need all of
%our inputs to be the same length, in terms of how many loans there are.
%This checks that condition and returns a more informative error in case
%they aren\'t the same. If you didn\'t have this here, you\'d still encounter
%an error later in your program when this condition isn\'t met, you would
%just have to do more interpreting.
if ~(numAccounts == length(accounts) & numAccounts == time2 & time == time2)
error(\'You must have a consistent dimensions among your inputs\')
end
  
%Interest accrued durring this payment schedule starts at 0.
totalGained = 0;
  
for j = 1:numAccounts
for i = 1:time
%With these accounts, we add montly deposits to the account
%total BEFORE calculating interest.
accounts(j) = accounts(i) + deposits(j,i);
%This will always calculate interest assuming a monthly interest
%rates
newAmt = accounts(i)+accounts(i)*double(accountRates(j,i)/100);
%We determine the new loan amount, then use the difference
%between new and old amounts (after payment) to update the
%total amount of interest accrued.
totalGained = totalGained + newAmt-accounts(i);
disp(totalGained);
%Once we make the interest calculation, we update our account
%amount.
accounts(i) = newAmt;
end
end
%The total amount owed in loans is the sum of all loans after the payment
%schedule.
totalMoney = sum(accounts);
end

% test code
% making add dimensions same
accounts = [345 234];
deposits = [124 432; 567 887];
accountRates = [23 12; 34 32];
[accounts, totalGained, totalMoney] = rec7prob4(accounts, deposits, accountRates);
disp(\"Accounts:\");
disp(accounts);
disp(\"=========\");
disp(\"Total amount Gained: \");
disp(totalGained);
disp(\"==========\");
disp(\"Total money:\");
disp(totalMoney);

%{
output:

Accounts:
892.44 2798.40   
=========
Total amount Gained:   
1040.8
==========   
Total money:   
3690.8

%}