Matrix Market Coordinate Format is an actively used text data format created in 1996.

23Years Old 1,025Users 0Jobs

Example code from the web:

1    0      0       6      0
0   10.5    0       0      0
0    0    .015      0      0å
0  250.5    0     -280    33.32
0    0      0       0     12
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Last updated February 11th, 2019