printing all matrix elements:

A(0,0) = 0

A(0,1) = 0

A(0,2) = 3.1

A(0,3) = 4.6

A(1,0) = 1

A(1,1) = 0

A(1,2) = 7.2

A(1,3) = 0

A(2,0) = 0

A(2,1) = 0

A(2,2) = 0

A(2,3) = 0

A(3,0) = 2.1

A(3,1) = 2.9

A(3,2) = 0

A(3,3) = 8.5

A(4,0) = 4.1

A(4,1) = 0

A(4,2) = 0

A(4,3) = 0

matrix in triplet format (i,j,Aij):

%%MatrixMarket matrix coordinate real general

5	4	8

1	3	3.1

1	4	4.6

2	1	1.0

2	3	7.2

4	1	2.1

4	2	2.9

4	4	8.5

5	1	4.1

matrix in compressed column format:

i = [ 1, 3, 4, 3, 0, 1, 0, 3, ]

p = [ 0, 3, 4, 6, 8, ]

d = [ 1, 2.1, 4.1, 2.9, 3.1, 7.2, 4.6, 8.5, ]

matrix in compressed row format:

i = [ 2, 3, 0, 2, 0, 1, 3, 0, ]

p = [ 0, 2, 4, 4, 7, 8, ]

d = [ 3.1, 4.6, 1, 7.2, 2.1, 2.9, 8.5, 4.1, ]