Array indices must be positive integers or logical values.ERROR

for d=0:5:50

Pl=40*log(d)-(10*log(gt)+10*log(gr_s)+20*log(ht)+20*log(hr));

Rss= pt+gt+gr_s-L50-L;

SNIR= Rss/n+I;

c=B*log(1+SNIR);

throuput1=(c(B*log(1+SNIR)));

end

Answer 1

[Walter Roberson]

c(B*log(1+SNIR)) is a request to index the variable c at the computed value. MATLAB does not have any implicit multiplication: if you want multiplication you need the * or .* operator.

Answer 2

[David Hill]

 throuput1=(c*(B*log(1+SNIR)));%I think you left out a * (c*...) otherwise you are trying to index into c

Also, log(0) will be -inf. Do you want to start out at d=0?