How to use the phantom function on MATLAB Version: 8.3.0.532 (R2014a)

Dear all,

I am running MATLAB Version: 8.3.0.532 (R2014a). I would like to use the phantom function (which I have been able to use on MATLAB Version: 7.14.0.739 (R2012a) and which is included in the documentation for MATLAB Version: 8.3.0.532 (R2014a)!).

However, when I run

P = phantom('Modified Shepp-Logan', 200);

in the Command Window, I get the following error message:

Undefined function 'phantom' for input arguments of type 'char'.

Moreover, when I run

ph = phantom(256);

in the Command Window, I get the following error message:

Undefined function 'phantom' for input arguments of type 'double'.

Can anyone advise me on how I could get the phantom function (which I have been able to use on MATLAB Version: 7.14.0.739 (R2012a)) running properly on MATLAB Version: 8.3.0.532 (R2014a)?

Thanks in advance,

Kaloyan Marinov

[Geoff Hayes]

The phantom function is part of the Image Processing Toolbox. Do you have it installed?

In the Command Window, type

 ver

to see the version of MATLAB and all installed toolboxes. If you don't see a line for the Image Processing Toolbox then it isn't installed. If you do see a line for it, then type

 which phantom -all

to locate the path(s) to the phantom function if it exists.

I notice the same error messages as you since I don't have this toolbox.