mu law compressor function

i have sawtooth function when i compress the function using this function

the matlab give me error

my code T = 10*(1/50); Fs = 10000; dt = 1/Fs; t = 0:dt:T-dt; x4 = sawtooth(2*pi*50*t);

 Xc = (log(1 + 255*abs(x4)) / log(1+u)) * sign(x4);

[ahmad ramadan]

u==255

[madhan ravi]

see the answer below

Answer 1

[madhan ravi]

 T = 10*(1/50);
Fs = 10000; 
dt = 1/Fs;
t = 0:dt:T-dt; 
x4 = sawtooth(2*pi*50*t);
u=255

   Xc = (log(1 + 255.*abs(x4)) ./ log(1+u)) .* sign(x4)

Answer 2

[ahmad ramadan]

may explain what you did

thaanx lot

[madhan ravi]

Anytime ;) I used dot in front of multiplication and division that's it which is know as element wise operation