keep getting an error message saying might be missing a closing bracket, causing invalid syntax at y, but the bracket is there. (line 34)

[Stephen23]

@Millie Bates: please paste your complete code as text. It is quite possible the the mistake occurs earlier in the code.

[Dyuman Joshi]

@Millie Bates, the request was to post the code as text, not the picture of the code.

Copy and paste your code.

[Stephen23]

@Millie Bates: please paste your code as text (as asked). We cannot open an image in the MATLAB editor.

[Stephen23]

As Fangjun Jiang observed, this line has several syntax errors, e.g.:

odeFun =@(t,y) [y(2);g*(2*h/R)y(1)/R+3(y(1)/R)^2];
%                                    ^^ scalar numeric cannot be indexed or called
%                            ^^ missing operator

Did you mean to multiply those terms, or use a delimiter of some kind?

[Millie Bates]

I'm not sure but would adding a multiplication operator define the variable R as another error says that the variable R is unrecognised

[Fangjun Jiang]

Do you mean this?

odeFun =@(t,y) [y(2);g*(2*h/R)*y(1)/R+3*(y(1)/R)^2]

[Stephen23]

"would adding a multiplication operator define the variable R as another error says that the variable R is unrecognised "

A multiplication operator does not define its input arguments. It requires its inputs to be already defined, for the simple reason that it is not possible to multiply numeric values that do not exist.

Defining variables is done e.g. by allocating something to that variable or as an input argument to a function.

The variable R is defined as the very first input to your function:

function [outputArg1,outputArg2] = Hemisphere(R,h,T_f)

Are you calling the function with its required inputs?

Answer 1

[Fangjun Jiang]

You can paste the text, instead of attaching a snapshot picture.

I believe there is a mistake in defining the odeFun. There is no operator in front of "y(1)". "3(y(1)" is not valid either.