index exceeds array bound meaning?

what is the meaning of index exceeds array bound

[suman sourabh]

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]

kindly resolve this

[Walter Roberson]

@suman sourabh

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.

Answer 1

[madhan ravi]

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.

[Walter Roberson]

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]

@Chaitanya lakeshri please let us know if something is unclear.

[Chaitanya Lakeshri]

Got it Thank you for your

[Chaitanya Lakeshri]

Got it Thank you for your help Madhan and walter

[madhan ravi]

Your welcome :)

[RAJESH RAJAN]

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]

hmdb51Files() returned empty for you.

I suspect that you are not running R2019a .

[Umar Farooq]

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]

You create a row vector, 1 row multiple columns. but index it as multiple rows with one column.

Answer 2

[CECILIA ABASCAL FALAGAN]

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

[Walter Roberson]

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