I have a scipy.sparse.csr matrix and would like to dump it to a CSV file. Is there a way to preserve the sparsity of the matrix and write it to a CSV?
Share
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I have a scipy.sparse.csr matrix and would like to dump it to a CSV file. Is there a way to preserve the sparsity of the matrix and write it to a CSV?
SciPy includes functions that read/write sparse matrices in the MatrixMarket format via the scipy.io module, including mmwrite: http://docs.scipy.org/doc/scipy/reference/generated/scipy.io.mmwrite.html
MatrixMarket is not CSV, but close. It consists of a one-line header that has #rows, #cols, # of nonzeros, followed by one line per nonzero. Each of these lines is the row index, column index, value. You could write a simple script that turns whitespace into commas and you’d have a CSV.