Assistance with simple error

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John on 10 Dec 2012
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
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)

Walter Roberson on 10 Dec 2012
Edited: Walter Roberson on 10 Dec 2012
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);

Muruganandham Subramanian on 10 Dec 2012
Edited: Muruganandham Subramanian on 10 Dec 2012
Check this:
I don't have r2012b version
a = [6, 9, 17, 0, 13, 9, 9, 12, 12, 12];
b = [7, 8, 20, 2, 11, 8, 9, 12, 13, 15, 2, 14];
plot::QQplot([a, b]);
John on 10 Dec 2012
Thanks,
On the :: it is giving the Error: Unexpected MATLAB operator.
Any suggestions?

Wayne King on 10 Dec 2012
Are you trying to enter this directly at the MATLAB command prompt?
You have to first enter
Then copy and paste the code in the MuPAD notebook and hit enter
John on 10 Dec 2012
Thanks!
John on 10 Dec 2012
Could you tell me the correct syntax for the command line?
It doesn't seem to like the ::
a = [6, 9, 17, 0, 13, 9, 9, 12, 12, 12];
b = [7, 8, 20, 2, 11, 8, 9, 12, 13, 15, 2, 14];
plot::QQplot([a, b]);

Wayne King on 10 Dec 2012
Do you have the Statistics Toolbox? If so you don't need to use MuPAD
a = [6, 9, 17, 0, 13, 9, 9, 12, 12, 12];
b = [7, 8, 20, 2, 11, 8, 9, 12, 13, 15, 2, 14];
qqplot(a,b)
John on 10 Dec 2012
Thanks, I thought the qqplot at this link was for continuous variables
And the qqplot at this link was for discrete variables (that is what the documentation says).
They do not produce the same plots?
I need to use the discrete option.
Thank you

Sean de Wolski on 10 Dec 2012
And in MuPAD, all you have to do is paste what you have above into a code line.