Matlab says function 'kroneckerDelta' is undefined

% Design FIR Filter by Window Function Method
wp = 0.2*pi; ws = 0.4*pi; % pass area end frequency, element area end frequency
w1 = 0.2 * pi; w2 = 0.4 * pi;
w0 = (w1+w2)/2;
trwidth = ws-wp;% transition bandwidth
N=ceil (6.6*pi/trwidth) + 1% Hamming window length (tap length)
win=hamming(N);% Hamming Window
Design FIR Filter with % Window Function (Unit Impulse Response)
wc = (w2-w1)/2;% cut-off frequency
n=-(N-1)/2—(N-1)/2;% time range
h=(2*kroneckerDelta(n))-(diag(2*cos(n*w0))*transpose((wc/pi)*inc(n*wc/pi)));% designed unit impulse response
subplot(2,2,1); 
stem(n,h);% Impulse Response Illustrated
axis([-(N-1)/2(N-1)/2-0.10.3]); grid;
xlabel('Time n');ylabel('g(n)');% Designed FIR Filter Frequency Response
dw = 0.001; % frequency increment
w=-20*pi:dw:20*pi;% frequency range
H = freqz(h,1,w);
maxH = max(abs(H)); % Max Frequency Response
dBH = 20*log10(abs(H)/maxH); normalization of % amplitude characteristics
subplot(2,2,2);
plot(w, dBH);% Amplitude Characteristics Illustrated
axis([-4*pi4*pi-805]); grid;
xlabel('Frequency\omega[rad]'); ylabel('|H(e^{j\omega})|[dB]');
Check Rp=-min(dBH(1:ceil(wp/dw)+1)% pass area ripple
Verify As=-max(dBH(ceil(ws/dw)+1:length(w)))% containment attenuation

 The function 'kroneckerDelta' is undefined.

Error: matlab_bandstopFIR(line11)
h=(kroneckerDelta(n))-(diag(2*cos(n*w0))*transpose((wc/pi)*inc(n*wc/pi)));% designed unit impulse response