1 files changed, 13 insertions, 0 deletions
diff --git a/104/CH2/EX2.20/2_20.sce b/104/CH2/EX2.20/2_20.sce
new file mode 100755
index 000000000..19237ce2c
--- /dev/null
+++ b/104/CH2/EX2.20/2_20.sce
@@ -0,0 +1,13 @@
+//rank of a matrix
+A=[0 1;0 1]
+[E,Q,Z ,stair ,rk1]=ereduc(A,1.d-15)
+disp(rk1,"rank of A=")
+B=[0 5 1 4;3 0 3 2]
+[E,Q,Z ,stair ,rk2]=ereduc(B,1.d-15)
+disp(rk2,"rank of B=")
+C=[3 9 2;1 3 0;2 6 1]
+[E,Q,Z ,stair ,rk3]=ereduc(C,1.d-15)
+disp(rk3,"rank of C=")
+D=[3 0 0;1 2 0;0 0 1]
+[E,Q,Z ,stair ,rk4]=ereduc(D,1.d-15)
+disp(rk4,"rank of D=")
+\ No newline at end of file