readsdpa function

Reading and writing semidefinite programs for SDPA format files.

Functions to read and write semidefinite program data and solutions in SDPA format.

readsdpa(file="",verbose=FALSE)
   writesdpa(C,A,b,K,file="")
   readsdpa.sol(K,C,m,file="")
   writesdpa.sol(X,Z,y,K,file="")

Arguments

• file: The name of the file to read from or write to.
• C: Block structured cost matrix
• A: List of block structured constraint matrices
• b: RHS vector
• K: Cone specification, as used in csdp
• X: Block structured primal optimal solution matrix
• Z: Block structured dual optimal solution matrix
• y: Dual optimal solution vector
• verbose: Printout information as problem is read. Passed to CSDP's readsdpa function. Default FALSE
• m: Number of constraints in problem.

Details

Block structured matrices must be specified as described in csdp. Files read must be in SDPA format (see http://euler.nmt.edu/~brian/sdplib/FORMAT). However, these functions don't support comments or grouping characters (e.g. braces, parentheses) in the block sizes specification.

Returns

Function readsdpa returns a list with elements C,A,b,K. Function readsdpa.sol returns a list with elements X,Z,y. All returned matrices are lists of objects of class simple_triplet_sym_matrix.

References

http://euler.nmt.edu/~brian/sdplib/FORMAT

Author(s)

Hector Corrada Bravo

See Also

csdp

Examples

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