Undefined function 'writePosition' for input arguments of type 'double'

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Hi, I have followed the guide from this page (https://www.mathworks.com/help/supportpkg/arduinoio/ug/control-servo-motors.html) on how to set up the servo motor via Arduino on Matlab.
However, I keep getting the following the error message: Undefined function 'writePosition' for input arguments of type 'double'
This page (https://www.mathworks.com/help//supportpkg/arduinoio/ref/writeposition.html) states that the writePosition function can take in any numeric value from 0 to 1, but yet the error shows up.
Why is this happening?
My code is as shown below:
Screenshot 2019-01-18 at 1.58.11 PM.png
Thank you.
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Answers (2)

madhan ravi
madhan ravi on 18 Jan 2019
change
function interval(x)
to
function interval
  14 Comments
Kin Sun Wong
Kin Sun Wong on 18 Jan 2019
Hi, thanks for the help so far.
I have reinstalled the package and the code is working again. Seems like some of the files got corrupted.

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amin ali
amin ali on 11 Sep 2021
hello
can you help me

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