strfind in stateflow

hi all

i have code in my embedded matlab function:

function V=sequence(x,n)
%#codegen
correct= testinput(x,n);
if correct
   V=10;
else
   V=1;
end
function correct = testinput(x,n)
eml.extrinsic('strfind');
correct = any(strfind((x')>4 & (x')<7,ones(1,n)));

how do we wrote it on stateflow??? could anyone send me the screenshoot of the stateflow block and Embedded matlab function inside of it???

thanks

Answer 1

[Fangjun Jiang]

Type "sf_seqrec" to open the demo model. Or search for "Sequence Recognition Using Mealy and Moore Charts" in doc. You just need to understand the basics of Stateflow chart such state and transition. In your case, one state is enough to do the job. You can also find other Stateflow tutorial to get started.

[Luhur]

i already knew stateflow fang, but how to use strfind in stateflow is not common for me.. ok, i will check the demo...

thanks fang, for now...

[Fangjun Jiang]

No. You don't use strfind() function. You use Stateflow. Define a state called "Counting" and an internal variable called "count", any time the input value is between 4 and 7, you enter or stay in the "Counting" state and an "count" is increased by 1. Any time the next input is not between 4 and 7, you get out of state "Counting" and "count" is reset to 0. If "count" is greater or equal to n, your output "V" is 10, otherwise, "V" is 1.