MATLAB: Assistance with simple error

Question

Hi,

I am copying the code below from this page, but it says error

"Undefined function 'a' for input arguments of type 'char'."

Could anybody tell me what is wrong?

Thanks

http://www.mathworks.co.uk/help/symbolic/mupad_ref/plot-qqplot.html

a := [6, 9, 17,  0, 13, 9, 9, 12, 12, 12]:
b := [7, 8, 20,  2, 11, 8, 9, 12, 13, 15, 2, 14]:
q := plot::QQplot(a, b):
plot(q)

Answer 1

Provided you have the symbolic toolkit, at the MATLAB command line use

a = [6, 9, 17,  0, 13, 9, 9, 12, 12, 12];
b = [7, 8, 20,  2, 11, 8, 9, 12, 13, 15, 2, 14];
feval(symengine, 'plot::QQplot', a, b);