This is expected behavior for the Embedded MATLAB Function Block.
In Embedded MATLAB once a variable is initialized its size and type may not be changed. Since the default type for a scalar is double the code
m = int16(1);
m = 10;
will error out because 10 is of type double and m is of type int16.
You can recast values for variable assignment in two ways.
1) Explicitly recast the value with the appropriate typcast function:
m = int16(1);
m = int16(10);
2) Implicitly recast the value using the colon operator:
m = int16(1);
m(:) = 10;
For more information on variable initialization and assignment in Embedded MATLAB Function Blocks see the documentation section titled: "Embedded MATLAB Coding Style", or you can execute the following in an MATLAB R2008a command window:
web([docroot '/toolbox/eml/ug/brdqvz_.html#bq2l74g']);
