problem with loops and conditional statements

I am writing a simple program with if loop inside a for loop but the program gets stopped in middle with error:

Index exceeds the number of array elements. Index must not exceed 1.

Error in newtrial (line 19)

Y(i) = Y(i) + 1;

and the plot is not generated as well even for values generated.

the code is:

clc
clear
x1 = 5

x1 = 5

y1 = 3

y1 = 3

x0 = 0

x0 = 0

y0 = 0

y0 = 0

dx = x1-x0

dx = 5

dy = y1-y0

dy = 3

e = dy-dx

e = -2

X = x0

X = 0

Y  = y0

Y = 0

for i = 1:1:5;
    
    X(i+1) = X(i) + 1
    
    if e(i) >= 0
        Y(i+1) = Y(i) + 1;
        e(i+1) = e(i) - dx; 
    else
        e(i+1) = e(i) + dy;
    end
end

X = 1x2

0 1

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X = 1x3

0 1 2

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Index exceeds the number of array elements. Index must not exceed 1.

Y
plot(X,Y,'bo')
axis([0 6 0 6])

I am new to this, so any help or correction in code is appreciated, thanks in advance.

Answer 1

[AMIT]

the problem is with the statement Y(i+1) = Y(i) + 1; in the second iteration it is trying to update the Y(3) with Y(2)+1 when during the first iteration the value of Y(2) is not updated in the else statement. try to rectify within the else statement for Y.

[bhawna]

It worked, Thank You so much.