Hi Jed, The matrix file's structure likes ============================== %Size = n n %Nonzeros = m zzz = zeros(m, 3); zzz = [ *** *** *** *** ... ... ];
Mat_0x84000000_0 = spconvert(zzz); ================================ How can I read this file in Matlab? Thanks, Meng ------------------ Original ------------------ From: "Jed Brown";<[email protected]>; Date: Jul 18, 2014 To: "Oo "<[email protected]>; "petsc-users"<[email protected]>; Subject: Re: [petsc-users] MatViewAndMatlabLoad Oo <[email protected]> writes: > Dear All, > > > I met a problem about using "load()" function in Matlab to read a m file > which describes a PETSc Mat object by : > //Save coeff_matrix as a matlab file PetscViewer viewer; > PetscViewerASCIIOpen(PETSC_COMM_WORLD,"CoeffMatrixFileName.m",&viewer); > PetscViewerSetFormat(viewer, PETSC_VIEWER_ASCII_MATLAB); > MatView(coeff_matrix, viewer); PetscViewerDestroy(&viewer); > In Matlab, I used:M=load("CoeffMatrixFileName.m") and I got an error.The > error is:???Error using ===> loadNumber of columns on line 2 of ASCII file > CoeffMatrixFileName.m must be the same as previous lines. What does the file look like? Note that we recommend using a binary viewer and A = PetscBinaryRead('binaryoutput') to read in MATLAB. It is more accurate and much faster. > Do you know how to deal with that error?Or Do you think there is some a > mistake in my output of PETSc Mat Obj with the PetscViewer? > Thank you~:) > Meng
