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

Question

Brian Peoples 2019-2-27

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https://ww2.mathworks.cn/matlabcentral/answers/447237-don-t-know-how-to-fix-index-in-position-1-exceeds-array-bounds-must-not-exceed-1

回答： Star Strider 2019-2-28

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 个评论
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KSSV 2019-2-27

编辑：KSSV 2019-2-27

We cannot help it without having data or all variables defined in hand. On top of it, you have not mentioned exact line where error occurs.

Brian Peoples 2019-2-28

在 MATLAB Online 中打开

%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