index exceeds array bound meaning?
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what is the meaning of index exceeds array bound
3 个评论
suman sourabh
2022-3-27
clc
clear
%Step 1: Define decision variables
x =optimvar('x',2,'LowerBound',[0 0],'UpperBound',[5 5]);
%Step 2: Define objective function
obj = x(1)^2 + x(2)^2 + x(3)^2;
%Step 3: Define constraints (if any)
A = 1 -x(2)^(-1)* x(3) >= 0;
B = x(1) - x(3) >=0;
C = x(1) - x(2)^2+x(2)*x(3)-4 ==0;
%Step 4: Define objective problem
prob = optimproblem('Objective',obj,'ObjectiveSense','maximize');
prob.Constraints.con_1 = A;
prob.Constraints.con_2 = B;
prob.Constraints.con_2 = C;
%Step 5: Solve the problem
x0.x = [0 0];
%Defining initial starting point
[sol, fval, exitflag, output] = solve(prob,x0);
suman sourabh
2022-3-27
kindly resolve this
Walter Roberson
2022-3-29
You have
x =optimvar('x',2,'LowerBound',[0 0],'UpperBound',[5 5]);
so you say that x is a vector of 2 optimization variables. Your upper bound and lower bound are both vectors of length 2, which is consistent. x is not ambiguous: it really is length 2.
obj = x(1)^2 + x(2)^2 + x(3)^2;
but there you try to use x(3)^2 which would require that x be of length 3 or more.
Your constaints A, B, C all require that x has at least 3 elements.
x0.x = [0 0];
but that says that the initial value is a vector of length 2.
You need to decide whether your function involves 2 variables or 3 variables.
采纳的回答
madhan ravi
2018-9-2
编辑：madhan ravi
2018-9-2
It means that the index number is more than the array elements.
An example:
x=[1:10]
x(11)
Your array has 10 elements but you try accessing the 11th element.
9 个评论
Walter Roberson
2018-9-2
For example, if you have a vector with 5 elements in it, and you ask to return the 6th element, then the 6 would be out of bounds in that case.
madhan ravi
2018-9-2
@Chaitanya lakeshri please let us know if something is unclear.
Chaitanya Lakeshri
2018-9-5
Chaitanya Lakeshri
2018-9-5
madhan ravi
2018-9-5
Your welcome :)
RAJESH RAJAN
2019-3-28
Sir if we are using like in the latest version, idx=1 and filename = files(idx);
the error occurs like this "Index exceeds array bounds."
here i used the same example and code from
openExample('nnet/ClassifyVideosUsingDeepLearningExample')
Walter Roberson
2019-3-28
hmdb51Files() returned empty for you.
I suspect that you are not running R2019a .
Umar Farooq
2022-11-28
Erro
Index in position 1 exceeds array bounds. Index must not exceed 1.
Error in New_Arya_Paris (line 27)
RI(i,j)=(di(i,j)+ di(i+1,j))/4000;
-------------------------------------------------------
Problm
w=[1.000 0.993 0.984 0.968 0.938 0.870 0.787 0.766 0.660 0.553 0.383 0.298 0.234 0.191 0.085]
d=[2.000 1.000 0.500 0.250 0.150 0.053 0.054 0.039 0.023 0.013 0.008 0.006 0.005 0.004 0.001]
di=d.*100
wi=(w.*1000)
ni=15
for j=1:1;
for i=1:(ni-1)
RI(i,j)=(di(i,j)+ di(i+1,j))/4000;
end
end
Walter Roberson
2022-11-28
You create a row vector, 1 row multiple columns. but index it as multiple rows with one column.
更多回答（1 个）
CECILIA ABASCAL FALAGAN
2020-8-16
0 个投票
Good morning,
I would like to obtain the real time of my computer to later carry out operations and obtain the elapsed time. I have used the "datetime" command but I can't separate the time from the date and use it for this purpose. Any suggestion? I would be very grateful
1 个评论
Walter Roberson
2020-8-16
Most of the time, you would use tic and toc to obtain elapsed time.
You can also use
tin = clock;
do your code
tout = clock;
how_long = etime(tout, tin) %seconds
You can also
tin = datetime();
do your code
tout = datetime();
how_long = seconds(tout - tin) %seconds
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