MATLAB examples are failing

Question

I don\'t have the slightest idea what\'s going on here, and Google provides no interesting help. I took the following example from http://www.mathworks.com/help/toolbox/symb

Answer 1

The documentation you're reading doesn't apply to your version of MatLab. I can reproduce your error in 2008b, for example.

The older documentation says:

Note that these examples assume equations of the form f(x) = 0. If you need to solve equations of the form f(x) = q(x), you must use quoted strings. In particular, the command

s = solve('cos(2*x)+sin(x)=1')

In the future, pay attention to the line at the top of every MatLab online documentation page where it says what version the documentation applies to.