Matlab User-defined function problem

[BodenD]

Homework Statement

Write a user-defined function that calculates grade point average (GPA) on a scale of 0 to 4 ...
https://41.media.tumblr.com/4f5e8ee38181d7c584c234138f632714/tumblr_nmnhq9p8jo1usetlso1_1280.png

The Attempt at a Solution

I'm getting the error that "function definitions are not permitted in this context"
And details says "A nested function cannot be defined in a control statement"

I don't really understand how to use functions. What can I do to fix this?

Oh and I took out that extra "end"

 

[jedishrfu]

I think its best to put it in a file before you use it:

http://www.mathworks.com/help/matlab/matlab_prog/create-functions-in-files.html

Here's a short tutorial on writing a MATLAB program:

http://www.mathworks.com/support/2015a/matlab/8.5/demos/WritingAMATLABProgram.html

 

[donpacino]

2 things.

1. in MATLAB you need to make functions as separate m files. so you will have one file for your function, then one file where you use it.

2. you generally don't want to write to an input to the function. you are redefining g as you use it. You might want to use an intermediate variable to write to

try g_letter and g_number

 

[BodenD]

Thank y'all! I figured out how to make the function work, but not with the Letter-to-number conversion I was trying to use. It didn't like the size of g when it was made of stings. So I just wrote g with the numbers instead of letter grades. Good enough!

https://41.media.tumblr.com/b768db26c487e07c370262dc345cb3e2/tumblr_nmrwnl6bpg1usetlso2_250.png
https://41.media.tumblr.com/ce387187354b1499a74fa028c76f50a4/tumblr_nmrwnl6bpg1usetlso1_1280.png