Index in position 1 exceeds array bounds (must not exceed 25). Please help!!

Question

william Smith 2019-3-3

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/448014-index-in-position-1-exceeds-array-bounds-must-not-exceed-25-please-help

评论： william Smith 2019-3-4

function [Slotplayers,RoulettePlayers,HouseEarning]= hw5_func(SlotRounds,RouletteRounds)
Slotplayers=zeros(SlotRounds+1,10);
SlotPlayers(1, :)=round(5000+(25000-5000).*rand(1,10));
HouseEarning = 0;
for i=1:SlotRounds
    Spin=rand(i,10);
    for k=1:10
        if  SlotPlayers(i,k)>=100
            if Spin(i,k)<= 0.00001
                SlotPlayers(i+1,k) = SlotPlayers(i,k) + 250000;
                
            elseif Spin(i,k)>0.00001 && Spin(i,k)<=0.00015
                SlotPlayers(i+1,k)= SlotPlayers(i,k)+ 100000;
                
            elseif Spin(i,k)>0.00015 && Spin(i,k)<=0.0005
                SlotPlayers(i+1,k)= SlotPlayers(i,k) + 40000;
                
            elseif Spin(i,k)>0.0005 && Spin(i,k)<=.005
                SlotPlayers(i+1,k)= SlotPlayers(i,k) + 5000;
                
            elseif Spin(i,k)>0.005 && Spin(i,k)<=0.07
                SlotPlayers(i+1,k)= SlotPlayers(i,k) + 500;
                
            elseif Spin(i,k)>0.07 && Spin(i,k)<=0.92434
                SlotPlayers(i+1,k)= SlotPlayers(i,k) + 0;
                
            end
        end
    end
    HouseEarning(i+1)= HouseEarning(i)+(sum(SlotPlayers(i,:))-sum(SlotPlayers(i+1,:)));
end

This is the error I am getting:

Index in position 1 exceeds array bounds (must not exceed 67).
Error in hw5_func (line 35)
   HouseEarning(i+1)= HouseEarning(i)+(sum(SlotPlayers(i,:))-sum(SlotPlayers(i+1,:)));

Thanks!

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Image Analyst 2019-3-3

What did you pass in for SlotRounds,RouletteRounds? What is the value of i when it threw the error? What are the sizes of HouseEarning and SlotPlayers?

This is just normal debugging practice. See this link to learn debugging methods. You will need to learn them sooner or later.

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Answer 1

Walter Roberson 2019-3-4

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/448014-index-in-position-1-exceeds-array-bounds-must-not-exceed-25-please-help#answer_363617

You initialize SlotPlayers with SlotRounds rows. When i becomes SlotRounds then you try to access SlotPlayers(i+1,:) which would be SlotPlayers(SlotRounds+1,:) which potentially does not exist because it was only initialized to SlotRounds.

In particular it will not be assigned to if SlotPlayers(SlotRounds,:) are all < 100.