Example program for dgesvd

This example finds the singular values and left and right singular vectors of the 6 by 4 matrix
A = 2.27 -1.54 1.15 -1.94 0.28 -1.67 0.94 -0.78 -0.48 -3.09 0.99 -0.21 1.07 1.22 0.79 0.63 -2.35 2.93 -1.45 2.30 0.62 -7.39 1.03 -2.57 ,  
together with approximate error bounds for the computed singular values and vectors.
The example program for dgesdd illustrates finding a singular value decomposition for the case mn.