Part $2($week $7)$: User$-$Defined Functions

For this part of the practical, you're required to enhance your program from

part $1$ by including a user$-$defined function that handles the mathematics

required to decode the resistor colour codes.

Your program must be structured as follows:

Your main MATLAB script must handle the user$-$interface elements

of your program only. I.e$.$ it will contain the menu system, user input

and the code that outputs the final answer to the Command Window.

Your main MATLAB script must also call your user$-$defined function

from within its code.

Your user$-$defined function must only handle the mathematical

elements of the colour code decoding. The resistor's value and

tolerance will then be returned from your function back to your main

script.

Error checking$/$input validation may be included in both your main

script and user$-$defined function where relevant.

Please ensure you've watched the lecture videos on user$-$defined

functions $($week $6$ lecture$)$ and ask teaching staff questions about this if

you're stuck.

Please also refer to the list of useful functions at the end of this

document $($Table I$)$ for some of the functions available in MATLAB that

will help with writing user$-$defined functions.

This program must still work for both $4-$ and $5-$band resistor types.

Your program must still be a text$-$based user interface $($not a Graphical User

Interface $($GUI$)).$

Refer to the sample program we tested in class during the week $1$ lectorials for

suggestions on how your program could work.