How to restart a for loop when specific condition is met?

Sir, i am trying to restart the route construction (vehicle_route: in my case) whenever the number of vehicles (NVU) exceeds 4. In some cases NVU =4, while in other cases it exceeds the NVU =4.

Below is the detailed code.

clear;clc;
% PROBLEM INSTANCE
nodes = csvread('E_C.csv')'; %Co-ordinates of Customers
number_of_nodes = size(nodes,2);%Number of Co-ordinates
demand = csvread('E_D.csv')';%Customers Demand
number_of_customers = 22; %Number of Customers
number_of_vehicles = 4;
vehicle_capacity = 6000; 
depot = 1;
length_of_string = number_of_customers+number_of_vehicles-1; %Maximum Possible Stops

vehicle_route = []; %Empty Array for tracking Vehicle Route
unvisited = colon(1,number_of_nodes); %Initialization of Unvisited Customers or Co-ordinates
NVU=1; %Number of Vehicles Used Initially ONE
for n=1:length_of_string
    if n==1
        vehicle_route(n) = depot; %Start of the Route
        unvisited(unvisited==vehicle_route(n))=[]; % Unvisited Co-ordinates
        filled_capacity = demand(vehicle_route(n)); % Load filled by the particular customr
    else
        next_customer = unvisited(randperm(length(unvisited),1)); %Random picking of Customer
        % to check feasilibility of route
        if demand(next_customer)<=vehicle_capacity
            vehicle_route(n)=next_customer; %Tracking Vehicle Route
            unvisited(find(unvisited==vehicle_route(n)))=[];% Unvisited Co-ordinates
            filled_capacity = demand(vehicle_route(n));% Load filled by the particular customer
            vehicle_capacity=vehicle_capacity-filled_capacity;% Remaining Capacity of Vehicle
        else
            %This resets everything and New Vehicle Starts
            vehicle_route(n) = depot;
            vehicle_capacity = 6000;
            filled_capacity = 0;
            %i = i+1;
            NVU=NVU+1;
        end
    end
    if length(unvisited)==0 %In case demand is fulfilled before max nodes visited.
        disp('Damand is fulfilled, Vehicle Route Followed is below')
        vehicle_route
        disp('Number of Vehicles used')
        NVU
        break;
    end
end

Answer 1

[darova]

Place for loop inside while loop

k = 0;
while k < 5
    for i = 1:10
        if i > 5
            k = k + 1;
            break
        end
    end
end

[ANURAG DEEPAK]

@darova Sir, i am unable to do in my example.

[darova]

Why? I provided vary simple example. Can you describe the problem?

[Image Analyst]

The code will work. I voted for this answer because it's clear and simple

Answer 2

[Image Analyst]

Try this:

k = 1;
maxWhileLoopIterations = 8;
maxForLoopIterations = 3;
while k <= maxWhileLoopIterations
	repeatLoop = false;
	for i = 1:maxForLoopIterations
		NVU = randi(6, 1, 1); % Get random number for NVU.
		fprintf('In the for loop with i = %d: NVU = %d.  k = %d.\n', i, NVU, k);
		if NVU >= 4 % Some condition to repeat the loop.
			fprintf('    Going to repeat for loop because NVU = %d.\n', NVU);
			repeatLoop = true;
			break;
		end
	end
	% See if for loop finished (i = 10) and so does not need repeating.
	if i == maxForLoopIterations && ~repeatLoop
		% We want to quit if the condition was never met and the for loop completely finished.
		% We need to check repeatLoop because it's possible the condition could be met on the last iteration.
		fprintf('1 : The for loop completely finished this last time with no need to repeat it.\n');
		fprintf('1 : Exiting while loop after for loop after running the for loop %d times.\n', k);
		break;
	end
	% Fail safe to prevent infinite loop.
	k = k + 1;
	% Tell user if we're breaking because of the failsafe.
	if k == maxWhileLoopIterations
		fprintf('2 : Exiting while loop because max iterations of %d have been done.\n', maxWhileLoopIterations);
		break;
	end
end

You'll see:

In the for loop with i = 1: NVU = 4. k = 1.

Going to repeat for loop because NVU = 4.

In the for loop with i = 1: NVU = 1. k = 2.

In the for loop with i = 2: NVU = 3. k = 2.

In the for loop with i = 3: NVU = 1. k = 2.

1 : The for loop completely finished this last time with no need to repeat it.

1 : Exiting while loop after for loop after running the for loop 2 times.