Problem with for loop in given algorithm
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Hello all, I am trying to code the following statement using for loop but not getting it clearly.
Queue length at a node in time slot 't+1' = Queue length at a node in time slot 't' + number of packets arrival in time slot 't'.
This is what I had tried:
T = 100; % Total slots
nodes = 8 % Total nodes
ini_q_len = 10; % Queue length at node 1 in time slot 't'
n = 10; % number of packets
p = 0.2; % probability of successful arrival of packets
for t = 1:T % each time slot
%% Queue length of each nodes
for i = 1:nodes
X(i) = ini_q_len+ binornd(n,p);
end
end
The problem with this is that I am not getting how to bring in for loop Queue length at a node in time slot 't' i.e., how to include previous slot queue length.
Any help in this regard will be highly appreciated.
回答（1 个）
unless Queue length value is not varying, you can initialize it as below and access in 2D matrix to include previous queue length values
T = 100; % Total slots
nodes = 8 % Total nodes
ini_q_len = repmat(10,1,100); % Queue length at node 1 in time slot 't'
K = 4; % some constant
for t = 1:T % each time slot
%% Queue length of each nodes
for i = 1:nodes
X(i,t) = ini_q_len(t)+ K;
end
end
13 个评论
charu shree
2023-5-2
charu shree
2023-5-2
May be like this
T = 100; % Total slots
nodes = 8 % Total nodes
ini_q_len = zeros(1,100); % Queue length at node 1 in time slot 't'
% assume 10 initially
ini_q_len(1) = 10;
K = 4; % some constant
for t = 1:T-1 % each time slot
%% Queue length of each nodes
for i = 1:nodes
X(i,t) = ini_q_len(t)+ K;
end
% generate values for ini_q_len using an expression (shown below is
% e.g)
ini_q_len(t+1) = ini_q_len(t)+num_packets(t);
end
charu shree
2023-5-2
VBBV
2023-5-2
Queue length at a node in time slot 't+1' = Queue length at a node in time slot 't' + number of packets arrival in time slot 't'.
This is not whats happening in your code. Check code i have shown how its done
charu shree
2023-5-3
It's an e.g. to include packets in your algorithm. You can replace it with suitable variable. E g. Variable n in your case which is assigned 10 earlier.
If the number of packets for each time slot is same , then you can modify the line in outer loop as
ini_q_len(t+1) = ini_q_len(t)+n;
otherwise
% where n is a vector containing number of packets for each time slot
ini_q_len(t+1) = ini_q_len(t) + n(t);
charu shree
2023-5-3
what is error you get ? can you explain Still not coming properly .... ? you need to use this code
T = 100; % Total slots
nodes = 8 % Total nodes
ini_q_len = zeros(1,100); % Queue length at node 1 in time slot 't'
n = 10;
% assume 10 initially
ini_q_len(1) = 10;
K = 4; % some constant
for t = 1:T-1 % each time slot
%% Queue length of each nodes
for i = 1:nodes
X(i,t) = ini_q_len(t)+ K;
end
% generate values for ini_q_len using an expression (shown below is
% e.g)
ini_q_len(t+1) = ini_q_len(t)+n(t); % n if no of packets are same each slot
end
charu shree
2023-5-3
charu shree
2023-5-3
VBBV
2023-5-3
Ok, np, if you think my answer helped solved your problem, please accept it
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2023-5-2
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