MATLAB: How to fix it

arduino

Im trying to make may arduino play a sequence of notes using a buzzer.
code:
%arduino music
pin = 'D5';
tune = 'eefggfedccdee dd';
beats = [1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 3];
notes = ['c', 'd', 'e', 'f', 'g', ' '];
freq = [262 294 330 349 392 0];
for ii = 1:length(tune)
    playTone(arduino,pin,freq(strcmp(tune(ii),notes)),0.1*beats(ii))
    pause(0.1*beats(ii))
end
output:
>> musicArduino
Error using musicArduino (line 12)
Invalid parameter type. The tone frequency
value must be a scalar double between 0 and
32767 (Hz).

Best Answer

You strcmp a single character from the tune to the 6 character vector formed by notes. The result will be a scalar false leading to empty freq selection.
Easiest fix is to make notes a cell array instead of a character vector. Remember that ['a', 'b'] means horzcat('a', 'b') which is 'ab'
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