Error trying to turn on arduino

I'm attempting to get a program running throw matlab to the arduino, I believe I have the com port set up and working correctly. The error occurs in the loop while trying to blink the led on the 1st writeDigitalPin line. I will include my input output lines hopefully it will help.

Input

 instrfind

a=arduino('COM4');

for i = 1:10

        writeDigitalPin(a, 11, 0);
        pause(0.5);
        writeDigitalPin(a, 11, 1);
        pause(0.5);

end

OUTPUT

    Serial Port Object : Serial-COM4

     Communication Settings 
        Port:               COM4
        BaudRate:           9600
        Terminator:         'LF'

     Communication State 
        Status:             open
        RecordStatus:       off

     Read/Write State  
        TransferStatus:     idle
        BytesAvailable:     0
        ValuesReceived:     3
        ValuesSent:         1

Undefined function 'arduino' for input arguments of type
'char'.

Error in arduinotest (line 4)
a=arduino('COM4');

[Geoff Hayes]

Bhagyashri Dengale's answer moved here

I had installed arduino in matlab successfullly. But it can not run by this code a= arduino('com7''uno') please help me.

[Geoff Hayes]

Bhagyashri - please copy and paste the full error message here.

[Bhagyashri Dengale]

a=arduino('uno') Undefined function 'arduino' for input arguments of type 'char'.

[Geoff Hayes]

This error message is telling you that the arduino function cannot be found. You mention that you have installed arduino successfully, but perhaps you need to add the location of this package to your MATLAB search path.

Answer 1

[Geoff Hayes]

Zack - the error message is suggesting that you don't have a function named arduino that accepts a char/string input. In the Command Window, type

 which arduino -all

to find that function. What do you see? Since I've installed the Arduino support package, I observe

 /Users/geoff/Documents/MATLAB/SupportPackages/R2014a/arduinoio/arduino.m  % arduino constructor

If you haven't installed the support package, then see the link Arduino Support from MATLAB for details. You may want to download the support package, then start MATLAB as an administrator, and launch the support package from within MATLAB to get it to install (and work) properly. You may also want to read the link installing hardware support package for Arduino for other information too (not all of which will be applicable for you though).

[Zack Bayhan]

Geoff, Thanks for the help I finally got a little time to play around with it and make the proper changes and works just fine now. Now I just have to read up on working with some pid controllers, steeper motors, and h-bridges. Thanks again. Zack