Chapter 04.05: Lesson: Have More Eqns Than Unknowns, Does It Mean We Have Inconsistent Sys of Eqns?

[M-og]

How did you know the rank without solving the system and find the number of basis? Rank(A)= number of basis in A

[wizardgeo]

library(matrixcalc)
augmentedMatrix <- matrix(c(25, 64, 50, 89, 5, 8, 10, 13, 1, 1, 2, 2, 106.8, 177.2, 213.6, 280.0), 4, 4)
matrix.rank(augmentedMatrix)
# returns 3, therefore Inconsistent since rank[A] = 2

[merlinpriyanga]

But there is one more possibility sir. Rank > no. of unknowns. Then what is the consistency sir?

[lakshmin]

we are using after ship app, when we upload a file the time it is showing Number of columns is inconsistent, what's that mean, how to solve that.