Why do I receive an error when I use the colon operator (:) in the Embedded MATLAB Function block as described in the documentation for Simulink 6.1 (R14SP1)?

The documentation associated with the Embedded MATLAB Function block in Simulink 6.1 (R14SP1), accessible by typing the following at the MATLAB prompt:

web ([docroot '/toolbox/simulink/slref/eml_blocks_ref13.html#limitations_on_indexing_operations'])

includes the following text and example:

 * M(i:j) where i and j change in a loop

 Embedded MATLAB never dynamically allocates memory for the size of the expressions that change as the program executes. The workaround is to use for loops as shown in the following example:

 for i=1:10

     for j = i:10

         M(i:j) = 2 * M(i:j);

     end

 end

However, when I use the preceding code featuring the color operator (:) in the Embedded MATLAB function block, the following errors are returned:

 Size of index expression is not statically known.

 Function 'Embedded MATLAB Function' (#32.175.178), line 7, column 11:

 "i:j"

 Errors occurred during parsing of Embedded MATLAB function 'Embedded

 MATLAB Function'(#32)

 Embedded MATLAB Interface Error: Port width mismatch. Input port "u"(#36) expects a scalar. The signal is a one dimensional vector with 1 elements.

Answer 1

[MathWorks Support Team]

This bug has been fixed in Release 14 Service Pack 2 (R14SP2). For previous releases, please read below for any possible workarounds:

We have verified that there is an error in the "Limitations on Indexing Operations" section of the documentation associated with the Embedded MATLAB Function block in Simulink 6.1 (R14SP1).

The correct version of the documentation should read as follows:

 * M(i,j) where i and j change in a loop

 Embedded MATLAB never dynamically allocates memory for the size of the expressions that change as the program executes. The workaround is to use for loops as shown in the following example:

 for i=1:10

     for j = i:10

         M(i,j) = 2 * M(i,j);

     end

 end