strfind in simulink and stateflow

hi all,,

i have condition using strfind in simulink and embedded matlab function.

here is my EMF:

function V=sequence(x)

correct= @(x)any(strfind((x)>4,[1 1 1 1 1]))

if correct(x)
   V=10000;
else
   V=1
end

• my input from simulink are:[5 5 5 5 5 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3]
• the output: V=1
• supposed V=10000

why it keeps telling me not the correct answer based on my condition????

what about in stateflow???

thanks

Answer 1

[Luhur]

the correct one is:

function V=sequence(x)
%#codegen
correct= testinput(x);
if correct
   V=10;
else
   V=1;
end
function correct = testinput(x)
eml.extrinsic('strfind');
correct = any(strfind((x')>4,[1 1 1 1 1]));

THANK YOU SO MUCH EVERYONE!! :)

Answer 2

[Kaustubha Govind]

Do you mean that you expect V=10000, but you actually get V=1? I don't know what you've done differently, but after changing your code to fit Embedded MATLAB restrictions, I got 10000 as output from the Embedded MATLAB Block:

function V=sequence(x)
%#codegen
correct= testinput(x);

if correct
   V=10000;
else
   V=1;
end

function correct = testinput(x)
coder.extrinsic('strfind');
correct = any(strfind((x)>4,[1 1 1 1 1]));

[Luhur]

my simulink shows error:

Undefined variable "coder" or class "coder.extrinsic".

[Luhur]

not

coder.extrinsic('strfind');

but

eml.extrinsic('strfind');

function V=sequence(x)

%#codegen

correct= testinput(x);

if correct

V=10000;

else

V=1;

end

function correct = testinput(x)

eml.extrinsic('strfind');

correct = any(strfind((x)>4,[1 1 1 1 1]));

but still tell error:

Embedded MATLAB Interface Error: Error using ==> strfind

Input strings must have one row.

Block Embedded MATLAB Function (#32)

While executing: none

Answer 3

[Paulo Silva]

if any(strfind((x)>4,[1 1 1 1 1]))
   V=10000;
else
   V=1
end

[Luhur]

are you using embedded matlab function paulo???

not works for me...

[Paulo Silva]

you have to declare any and strfind extrinsic functions, I didn't test the code

[Luhur]

i already did, like this:

function V=test(x)

eml.extrinsic('strfind');

if any(strfind(x>4,[1 1 1 1 1]));

V=10000;

else

V=1;

end

shows error:

Embedded MATLAB Interface Error: Error using ==> strfind

Input strings must have one row.

Block Embedded MATLAB Function (#32)

While executing: none

[Luhur]

test the code please.. :)

[Luhur]

test the code please.. :)

Answer 4

[Luhur]

nope, its a strfind, the condition will true if the value is in sequence 5 time a row and also bigger than 4...