Help Figure out the error

1 view (last 30 days)
Joshua Amuga
Joshua Amuga on 2 Nov 2016
Answered: Walter Roberson on 5 Nov 2016
Error: Unbalanced or unexpected parenthesis or bracket.

Answers (2)

Nick Counts
Nick Counts on 5 Nov 2016
Looks like there's a lot going on here.
It appears that ode() is a function and you are attempting to pass two arguments. The first argument is enclosed in {} which, in Matlab-land, defines a cell (variable type).
You are attempting to assign the following as the contents of a cell: y''(x)+4*y'(x)+3*y,y(0)=3,y'(0)=4
Data Types:
This is very confusing to poor Matlab (and others as well!) You can assign all kinds of variable types to the contents of a cell: numerical, string, objects, other cells... but you can't mix types within a cell.
Understanding the Error:
Matlab is trying to intemperate your code something like this:
"This cell contains the value of y, an empty string, possibly an index to something I don't understand or maybe just the value of x, maybe the string "(x)+4*y"... and so on.
Hopefully that makes sense.
Symbolic Math and Matlab
If you are trying to use Matlab's symbolic math capabilities, I suggest starting here:
Or possibly:
help syms
doc syms
Good luck!

Walter Roberson
Walter Roberson on 5 Nov 2016
You are trying to use MuPAD syntax inside of MATLAB.


Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!