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# Don't know how to fix... Index in position 1 exceeds array bounds (must not exceed 1).

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Brian Peoples on 27 Feb 2019
Answered: Star Strider on 28 Feb 2019
Hello--
I keep getting this error and i've tried to fix it for so long. it is occuring on lines between the lines specified bellow (I bolded them). If anyone can figure out why I would appreciate it. I know it is an indexing error, but I can't figure out where I messed up.
for l = 1:RouletteRounds
x = (randi([2 12],1,10)) *.01; %random number between 2-12%
Bet = x .* RoulettePlayers(l,:); %creates a vector Bet that is 2-12% of in pocket cash
for ll = 1:RouletteRounds
if RoulettePlayers(1,ll) > 100 %if cash is greater than 100
if Bet(1,ll) < 100 %enters if statement: if bet is less than 100, = 100
Bet(1,ll) = 100;
else
end
else
Bet(1,ll) = 0;
end
end %2nd for loop
BetType(1,:) = randi([-4,-1],1,10);
for r = 1:RouletteRounds %for loop creating different bets and the intervals
if BetType(1,r) == -3
BetType(2,r) = randi([0,36])
elseif BetType(1,r) == -4
BetType(2,r) = randi([0,36])
BetType(3,r) = randi([0,36])
end
end
Roll = randi([0,36],1,10)
%9 compare the actual roll and seeing if they made money
ERROR IN THIS FORLOOP ON MULTIPLE LINES I GET ERROR Index in position 1 exceeds array bounds (must not exceed 1). FORLOOP BELOW ->>>
for t = 1:RouletteRounds
if BetType(1,t) == -3
if Roll(1,t) == BetType(2,t) %if bet is equal to bettype column 2
RoulettePlayers(l+1,t) = RoulettePlayers(l,t) + Bet(l,t)*36
else
RoulettePlayers(l+1,t) = RoulettePlayers(l,t) - Bet(l,t)
end
elseif BetType(1,t) == -4
if Roll(1,t) == BetType(2,t) || Roll(1,t) == BetType(3,t) %if bet is equal to bettype column 2,3
RoulettePlayers(l+1,t) = RoulettePlayers(l,t) + Bet(l,t)*18
else
RoulettePlayers(l+1,t) = RoulettePlayers(l,t) - Bet(l,t)
end
elseif BetType(1,t) == -1
if Roll(1,t) == 1:18
RoulettePlayers(l+1,t) = RoulettePlayers(l,t) + Bet(l,t)
else
RoulettePlayers(l+1,t) = RoulettePlayers(l,t) - Bet(l,t)
end
elseif BetType(1,t) == -2
if Roll(1,t) == 19:36
RoulettePlayers(l+1,t) = RoulettePlayers(l,t) + Bet(l,t)
else
RoulettePlayers(l+1,t) = RoulettePlayers(l,t) - Bet(l,t)
end
end
end
HouseEarnings = HouseEarnings + (sum(RoulettePlayers(1,:)) - sum(RoulettePlayers(end,:)))
end %(1st for loop)
##### 2 CommentsShowHide 1 older comment
Brian Peoples on 28 Feb 2019
%Roulette
RouletteRounds = 10;
RoulettePlayers = zeros(RouletteRounds+1,10);
initial_intt = randi([5000,25000],1,10);
RoulettePlayers(1,:) = initial_intt
Bet = zeros(1,10);
BetType = zeros(3,10);
So sorry about this!! Ignore the HouseEarnings variable at the end of the loop I sent, there is no problem with that. The error in the code occurs in the loop I specified (getting errors on this part of the for loop above:
elseif BetType(1,t) == -4
if Roll(1,t) == BetType(2,t) || Roll(1,t) == BetType(3,t) %if bet is equal to bettype column 2,3
RoulettePlayers(l+1,t) = RoulettePlayers(l,t) + Bet(l,t)*18
else
RoulettePlayers(l+1,t) = RoulettePlayers(l,t) - Bet(l,t)
end

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### Accepted Answer

Star Strider on 28 Feb 2019
The problem is the ‘Bet’ subscript. It is a (1 x 10) vector, not a matrix, so it should have only one subscript, not two.
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