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#!/usr/bin/env python import numpy l = [] for line in open( 'matrix.txt' ): l.append( [ float(x) for x in line.split() ] ) m = numpy.matrix( l ) print m Result: [[ 4. 0.68 0.98 0.23] [ 4. 0.23 0.54 0.32] [ 5. 0.56 0.12 0.99]]