Reading from an Excel File and manipulating Data - excel

Question

I'm using Matlab to read from an Excel file. I'm supposed to be reading a column of integers called Change Due. After I read the column I am supposed to be calculating the change,in Quarters,Dimes..etc
I can read the column no problem,and I understand the math of how to calculate the change. however using a condition to check the amount of change is difficult...
Problem:
I know that for Multiplication/Division of Vectors you can add a period to make it a scalar .* or ./
But how do I parse through a vector with a condition?
if(Change.<25&&Change.>=10)
I get this Error:
Operands to the || and && operators must be convertible to logical scalar values.
If I was to just simple leave the period out I would not get an error message but it only goes through the first row for calculations.
Code:
% Filename: Program_04_1
% Author: Stewart Moon
% Assisted by: No one
% Program Description:
% The purpose of this program is to demonstrate how to read from an Excel
% file and to then calculate the amount of coins it will take per row
clc % clc clears the contents of the command window
clear % clear, clears all defined variables form the Matlab workspace
close all % closes all figure windows
% Declare Variables
Quarters=0;
Dimes=0;
Nickels=0;
Pennies=0;
TotalCoins=0;
% Output of the title and author to the command window
fprintf('Output for Program_04_1 written by Stewart Moon.\n')
fprintf('\nOriginal Data read from Program_04_1_Data.xlsx\n')
fprintf('\nMinimum Number of Coins Needed to Make Change\n')
Change=xlsread('Tutorial_04_1_Data.xlsx','Coins','B4:B43'); % Reading the column in Excel and storing it the variable Change
% Output Header Format
fprintf('\nChangeDue(cents) Quarters Dimes Nickels Pennies Total Coins\n\n')
table=[Change];
disp([table])
Command Window Output:
Output for Program_04_1 written by Stewart Moon.
Original Data read from Program_04_1_Data.xlsx
Minimum Number of Coins Needed to Make Change
ChangeDue(cents) Quarters Dimes Nickels Pennies Total Coins
1
4
5
6
10
14
15
16
20
24
25
29
30
31
35
37
40
42
45
49
50
54
55
56
60
64
65
68
70
73
75
77
80
81
85
88
90
91
95
99
Calculating Change Pseudo Code:
while(Change>0)
if (Change>=25)
Change=Change-25;
TotalCoins=TotalCoins+1;
Quarters=Quarters+1;
end
if (Change<25&&Change>=10)
Change=Change-10;
TotalCoins=TotalCoins+1;
Dimes=Dimes+1;
end
if (Change<10&&Change>=5)
Change=Change-5;
TotalCoins=TotalCoins+1;
Nickels=Nickels+1;
end
if (Change<5&&Change>=1)
Change=Change-1;
TotalCoins=TotalCoins+1;
Pennies=Pennies+1;
end
end

Answer 1

From my understanding, you want to achieve something like:
for i = 1 : length(Change)
% your conditions using indices for the array
% example:
% if(Change(i) > 25)
% instructions
% end
end