Longest Run Tosses Matlab
2 views (last 30 days)
Show older comments
Write an efficient function which computes the length of the longest run of heads in an arbitrary sequence of heads and tails ?
The excercise is about a coin toss and i would really appreciate if someone could help me with this excercise.
6 Comments
madhan ravi
on 5 Jun 2020
KBB it's really clear that your professor found this link ;) and thank you for disrespecting others effort.
Answers (3)
Walter Roberson
on 5 Jun 2020
at any one time you only need a few pieces of information:
- are you currently in a run
- length of the current run
- maximum length of run encountered so far
if you are not in a run and you encounter a T then move on to the next entry
if you are in a run and you encounter a T then compare the length of the current run to the maximum so far to determine if you have a new record. Afterwards either way mark yourself as no longer being in a run. then move on to the next entry.
if you are in a run and encounter a H then increment the length of the current run. Then move on to the next entry.
I left out a detail that you should be able to catch.
You can get away with using just two variables aside from the loop index.
0 Comments
KSSV
on 5 Jun 2020
Edited: KSSV
on 5 Jun 2020
N = 2 ; % [1- heads, 2-tails]
toss = 100 ; %number of tossings
state = zeros(toss,1) ;
for i = 1:toss
state(i) = randperm(N,1) ;
end
% split the states which are continuous 1 and/or 2
S = mat2cell(state, diff([0; find(diff(state)); size(state,1)]));
% Get the length of sequence of states
L = cellfun(@length,S) ;
% Get the maximum length sequence
[val,id] = max(L) ;
fprintf("State:%d is repeated maximum of %d times\n",unique(S{id}),val)
2 Comments
KSSV
on 5 Jun 2020
You should understand first how/ what the code is.
Thanks is accepting the answer. :)
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!