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2019-01-27 16:34:47 +0100 | asked a question | Convert real matrix into Integer matrix Suppose I have a real matrix with integer entries A = matrix(RR,[[1,2,3],[4,5,6]]) I would like to convert it to an Integer matrix (ZZ). I can do it element by element but is there a function that will do this for the entire matrix. Doing B=ZZ(A) will return an error message unable to coerce <type 'sage.matrix.matrix_generic_dense.matrix_generic_dense'=""> to an integer. |

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2019-01-24 21:46:38 +0100 | answered a question | How do I save a rational matrix for Mathematica and Matlab to read? Thanks so much. Just to add this from my experience. In Sage, I do this (say A is the rational matrix): o = open('file.txt','w'); o.write(str(A._mathematica_init())); o.close(); Then in Mathematica, I do this A = ReadList("file.txt")[[1]] I need the [[1]] to make it as a matrix. Otherwise, it is a 3-dimensional matrix. For MATLAB, octave_init does not work. Any suggestions would be appreciated. I also never get Mathematica interface working in Sage (8.5 Windows 64bit version) :( |

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2019-01-23 07:26:50 +0100 | asked a question | How do I save a rational matrix for Mathematica and Matlab to read? Hi, I create a rational matrix (rather large, say 1000x1000), and I want to save it in a file that can be read by Mathematica or MATLAB (with symbolic toolbox). Is there a simple way to do that? Right now, I use o = open('file.txt','w') o.write(str(A)) o.close() where A is the matrix. However, it has these "[" and "]" at the beginning of line that makes it difficult for Mathetmatica and MATLAB to read. Any suggestions would be appreciated. |

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