My script isn't working, can someone please! help me? Further explanation in thread.
1 view (last 30 days)
Show older comments
function M = initializeBoard(N, p)
for i = 1 : N
for j = 1 : N
x = rand(1);
if (x < p)
M(i,j) = 1;
else
M(i,j) = 0;
end
end
end
end
Imagine that this functions creates a N x N matrix A (M).
This matrix consists of 1's and 0's, and the distribution of these depends on p, as can be seen:
if (x < p)
M(i,j) = 1;
else
M(i,j) = 0;
end
function pathFound = findPath(N, p)
A = initializeBoard(N, p);
scanPath = bwlabel(A,4);
[rowNum, ~] = size(scanPath);
stats = regionprops(scanPath, 'PixelList');
pathFound = false;
for iblob = 1:length(stats)
if ((min(stats(iblob).PixelList(:,2)) == 1) && (max(stats(iblob).PixelList(:,2)) == rowNum))
scanPath(scanPath == iblob) = 10*iblob;
pathFound = true;
else
pathFound = false;
end
end
end
This function should check if there's a path between bottom and top of the matrix, and if there is, return a 'true' value.
clear; close all; clc;
pSteps = 20;
M = 100;
N = 200;
probs = [];
ps = [];
for i = 1:pSteps
p = (1/pSteps) * i;
fprintf('p is at %.2f\n', p);
paths = 0;
for m = 1:M
if findPath(N, p) == 1
paths = paths + 1;
end
end
prob = paths / 50;
probs = [probs, prob];
ps = [ps, p];
end
plot(ps, probs)
The script above checks for 20 equally distributed values between 0 and 1 what the probability is of finding a path in a matrix with size N x N.
The output I get from N = 100, M = 100, pStep = 20 (0.05 - 1.00):
The output I get from N = 200, M = 100, pStep = 20 (0.05 - 1.00):
However, the output I get from N = 200 and N = 100 is very different from the output I am supposed to get:
My Question: Does anyone know where I made a mistake / why do my graphs not look like the one shown above at all?
2 Comments
Answers (0)
See Also
Categories
Find more on Get Started with MATLAB in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!