Questions tagged [maximization]
53 questions
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1 answer
How to maximise addition/subtraction combinations?
Suppose I have a list of 10 elements [a, b, c, d, e, f, g, h, i, j] and I can multiply each element by 0, 1, 2, -1, -2.
The total of the multiplication factors I use must be equal to zero. Ie if I multiply five numbers by -1 I must multiply the…
Maya Kearney
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1
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1 answer
Variable division in or-tools python
I am working with MIP solver provided by or-tools (in python)
assume we have two variables x and y .
I know how to maximize one single variable OR the sum of two variables.
for example,
if we want to maximize 2*x we can do it this way
objective =…
Scoob
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4 answers
Highest Percentage Increase
Lets say we have the following set of numbers representing values over time
1 2 3 10 1 20 40 60
Now I am looking for an algorithm to find the highest percentage increase from one time to another. In the above case, the answer would be the pair (1,…
Karthick
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1
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2 answers
Linear programming with minimum and maximum fixed cost
I need your help in the following optimisation problem.
I have a maximisation Mixed Integer linear programming problem.
I would like to consider the minimum & maximum fixed fee.
I've done it in this way..
cost = max(minimum fixed cost , cost rate…
user7090205
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1
vote
0 answers
four-moment optimisation using ortfolioAnalytics package (error with DEoptim)
I want to optimize a currency portfolio using the 4 moment maximisation method and PortfolioAnalytics package in R.
this is the code I use:
PF<-data
ARG = xts(PF$ARGENTINA, order.by=as.Date(PF$DATE))
SING = xts(PF$SINGAPOR,…
Nourhaine Nefzi
- 73
- 10
1
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0 answers
Maximize a function in R with Nas values
I would like to maximize the funcToOpt in the code.
Description of the data:
wb and X1 are T x N matrix, and Nt a vector of length N
the sum of each row of wb is 1
X1 is cross-sectionally standardized (mean=1 sd=0)
The standardization implies…
Matteo Guidarini
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2 answers
maximize a function with recursion c++
I am trying to maximize this function in c++:
I have put this in the function:
int F(int n , int T ){
if( T >= 0 && n == 0){
return 0;
}else if( T < 0){
return INT_MIN;
} else if(T >= 0 && n > 0){
for(int i = 0 ; i…
Quico Llinares Llorens
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1
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1 answer
C++ Algorithm for solving maximisation in linear programming
I am learning about maximisation with linear programming, and have come across an algorithm for maximisation with two variables (silver and gold in this instance) but I am unsure what a certain section of the code is doing:
using namespace…
Barney Chambers
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2 answers
How to select weighted items to maximize profit?
This might sound like a simple problem but I am not able to get a good solution. The problem is similar to a knapsack problem but slightly modified.
I have a bag which has a fixed capacity, say C. We have a list of items and their weights. The total…
Neo
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0 answers
Mixed constrained and unconstrained maximization in R
I have a problem trying to maximize a log likelihood function in R.
My function has 5 parameters out of which I would like to constrain 3 to be positive while leave the other 2 (which should be very small, close to 0, but either positive or…
g_puffo
- 613
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1
vote
1 answer
Gain maximization on trees
Consider a tree in which each node is associated with a system state and contains a sequence of actions that are performed on the system.
The root is an empty node associated with the original state of the system. The state associated with a node n…
Eleanore
- 1,750
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1
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0 answers
optimization with inequality and bound constraints
I would like to conduct an optimization with inequality and bound constraints:
To maximize f= SEA (a,b,c,d)
with constraints
Pmax (a,b,c,d)<=145
0 <= a <= 10
80 <= b <= 240
0.5<= c <= 1.5
0 <= d <=0.534
Based on literatures, fmincon is an…
Fauziah Mat
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1
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1 answer
Maximizing in mathematica with multiple maxima
I'm trying to compute the maxima of some function of one variable (something like this:)
(which is calculated from a non-trivial convolution, so, no, I don't have an expression for it)
Using the command:
NMaximize[{f[x], 0 < x < 1}, x, AccuracyGoal…
Jorge Leitao
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Maximum Fortune by selling and buying potatoes spices over time
Lets say we have an initial fortune of 10$ and we want to make money by buying and selling potatoes and in a magical way we know the prices($) per kg per year of each potato spice. What is the best algorithm to find the final maximum fortune or a…
P. M. K
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0
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1 answer
How to find the maximum value of a function changing one constant value in R?
I have the following linearized plot:
a and b are vectors with data, c is a constant. The task is find a value of c that maximizes R^2 for a linear regression
a <- c(56.60, 37.56, 15.80, 27.65, 9.20, 5.05, 3.54)
b <- c(23.18, 13.49, 10.45, 7.24,…
Daniel Valencia C.
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