Dear all,
I need to maximize the v:
v= D' W D
D is a column vector ( n , 1)
W is a given matrix (n, n)
subject to:
sum D= 1
(BTW, n is less than 300)
I´ve tried to use maxBFGS, as follows:
#
objectiveFunction<-function(x)
{
return(t(D)%*%W%*%D)
}
Amat
Dear R-users,
Is there any way of calculating the perimeter of a polygon in a shapefile
object? Furthermore, how to calculate the length of the common border of two
polygons?
I've searched the code of spded, but could not find a hint on how to do it.
Thank you very much,
Leo.
[[alternativ
Dear R users,
I would like to know how to indentify the polygons that are located on the
border of a map (i.e.shapefile).
Do you have any suggestion on how to do it?
Thank you very much,
Leo Monasterio.
[[alternative HTML version deleted]]
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Dear R users,
In the function bellow I want to find the maximum value of v,
subject to the constrain that the sum of x is equal to 1.
I want to maximize:
v<-t(x)%*%distance%*%x
Subject to:
sum(x)=1
Where:
"x" is a vector n X 1
"distance" is a matrix n*n and it is given.
(In practice, the numbe
Dear R users,
I want to find the maximum value of v, subject to the constrain that
the sum of x is equal to 1.
So, I want to maximize:
v<-t(x)%*%distance%*%x
Subject to:
sum(x)=1
Where:
"x" is a vector n X 1
"distance" is a matrix n*n and it is given.
(In practive, the number of n can go up to
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