Displaying 5 results from an estimated 5 matches for "variableslsfit".
2016 Apr 20
6
Solving sparse, singular systems of equations
...t;)b = matrix(c(-30,40,-10),nrow=3,ncol=1)
#solve for x, Error in LU.dgC(a) : cs_lu(A) failed: near-singular A (or out of memory)solve(A,b,sparse=TRUE,tol=.Machine$double.eps)
#one x that happens to solve Ax = bx = matrix(c(-10,10,0),nrow=3,ncol=1)A %*% x
#Error in lsfit(A, b) : only 3 cases, but 4 variableslsfit(A,b)#solves the system, but fails belowsolve(qr(A, LAPACK=TRUE),b)#Error in qr.solve(A, b) : singular matrix 'a' in solveqr.solve(A,b)
#matrices used in my actual problem (see attached files)A = readMM("A.txt")b = readMM("b.txt")
#Error in as(x, "matrix")[i, ,...
2016 Apr 20
0
Solving sparse, singular systems of equations
...(-30,40,-10),nrow=3,ncol=1)
> #solve for x, Error in LU.dgC(a) : cs_lu(A) failed: near-singular A (or out of memory)solve(A,b,sparse=TRUE,tol=.Machine$double.eps)
> #one x that happens to solve Ax = bx = matrix(c(-10,10,0),nrow=3,ncol=1)A %*% x
> #Error in lsfit(A, b) : only 3 cases, but 4 variableslsfit(A,b)#solves the system, but fails belowsolve(qr(A, LAPACK=TRUE),b)#Error in qr.solve(A, b) : singular matrix 'a' in solveqr.solve(A,b)
> #matrices used in my actual problem (see attached files)A = readMM("A.txt")b = readMM("b.txt")
> #Error in as(x, "matrix&qu...
2016 Apr 20
0
Solving sparse, singular systems of equations
...0),nrow=3,ncol=1)
> #solve for x, Error in LU.dgC(a) : cs_lu(A) failed: near-singular A (or
> out of memory)solve(A,b,sparse=TRUE,tol=.Machine$double.eps)
> #one x that happens to solve Ax = bx = matrix(c(-10,10,0),nrow=3,ncol=1)A
> %*% x
> #Error in lsfit(A, b) : only 3 cases, but 4 variableslsfit(A,b)#solves the
> system, but fails belowsolve(qr(A, LAPACK=TRUE),b)#Error in qr.solve(A, b)
> : singular matrix 'a' in solveqr.solve(A,b)
> #matrices used in my actual problem (see attached files)A =
> readMM("A.txt")b = readMM("b.txt")
> #Error in as(x,...
2016 Apr 20
0
Solving sparse, singular systems of equations
...40,-10),nrow=3,ncol=1)
>#solve for x, Error in LU.dgC(a) : cs_lu(A) failed: near-singular A (or
>out of memory)solve(A,b,sparse=TRUE,tol=.Machine$double.eps)
>#one x that happens to solve Ax = bx =
>matrix(c(-10,10,0),nrow=3,ncol=1)A %*% x
>#Error in lsfit(A, b) : only 3 cases, but 4 variableslsfit(A,b)#solves
>the system, but fails belowsolve(qr(A, LAPACK=TRUE),b)#Error in
>qr.solve(A, b) : singular matrix 'a' in solveqr.solve(A,b)
>#matrices used in my actual problem (see attached files)A =
>readMM("A.txt")b = readMM("b.txt")
>#Error in as(x, "...
2016 Apr 20
1
Solving sparse, singular systems of equations
...(-30,40,-10),nrow=3,ncol=1)
> #solve for x, Error in LU.dgC(a) : cs_lu(A) failed: near-singular A (or out of memory)solve(A,b,sparse=TRUE,tol=.Machine$double.eps)
> #one x that happens to solve Ax = bx = matrix(c(-10,10,0),nrow=3,ncol=1)A %*% x
> #Error in lsfit(A, b) : only 3 cases, but 4 variableslsfit(A,b)#solves the system, but fails belowsolve(qr(A, LAPACK=TRUE),b)#Error in qr.solve(A, b) : singular matrix 'a' in solveqr.solve(A,b)
> #matrices used in my actual problem (see attached files)A = readMM("A.txt")b = readMM("b.txt")
> #Error in as(x, "matrix&qu...