"enter value" command in embedded matlab function

hi everyone,

i have a constant value which is change depends on new input and user need to write the new value. I tried to write command in embedded matlab function as below but failed. Anyone have ideas?Hope can help me

function Tjacket = fcn

%#eml

Tjacket = 'please enter value'

[TAB]

• constant value can not be changed during simulation.
• Tjacket = 'please enter value' --- simulink not supports the string type, so you can't out a string from embedded matlab function block.