Problem with looping: the loop does not stop
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Hello!
I have a problem that I have built a simple loop, which does not stop while running the code. Does anyone know what could be the issu? I have Matlab 2014.
Lw=106.5
hs=80
hr=1.5
a_air=0.0001
La=zeros(1,8000)
d=1:8000
for i=1:8000
if i<=1000
La(i)=Lw - 8 - 20*log(i) - 0.005*i
else
deltaLa=10*log(10^(Lw/10)) - 10*log(10^((Lw-sqrt(i)*a_air)/10))
La(i)=Lw - 8 - 20*log(i) - deltaLa + 10*log(i/1000)
end
end
Thank you!
1 个评论
Muhammad Usman
2020-4-25
Why are you using
d=1:8000
for loop check the if condition at every iteration, and will continue for 8000 in total.
So you can skip the for loop and just use 'd' array to compute your results
Lw=106.5;
hs=80;
hr=1.5;
a_air=0.0001;
La=zeros(1,8000);
d=1:8000;
if d<=1000
La(d)=Lw - 8 - 20*log(d) - 0.005*d
else
deltaLa=10*log(10.^(Lw/10)) - 10*log(10.^((Lw-sqrt(d)*a_air)/10));
La(d)=Lw - 8 - 20*log(d) - deltaLa + 10*log(d/1000)
end
采纳的回答
Jamal Nasir
2020-4-25
编辑：Jamal Nasir
2020-4-25
%%% you can try this it work good %%%%
clc
clear
Lw=106.5
hs=80
hr=1.5
a_air=0.0001
d=1:8000
La=[];
for i=1:8000
if i<=1000
La=[La; Lw - 8 - 20*log(i) - 0.005*i];
else
deltaLa=10*log(10^(Lw/10)) - 10*log(10^((Lw-sqrt(i)*a_air)/10))
La=[La;Lw - 8 - 20*log(i) - deltaLa + 10*log(i/1000)];
end
end
4 个评论
Muhammad Usman
2020-4-25
your logic contradicts as you first established
La=zeros(8000,1)
and then
La=[];
it means you assigned La zeros values and make it empty
Jamal Nasir
2020-4-25
编辑：Jamal Nasir
2020-4-25
Delete first one
Muhammad Usman
2020-4-25
What about the results produced by me in the comment section?
Anne
2020-4-25
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