I receive different output to like input

why is there diffrent in the outputs?

[Gautam Chettiar]

v' is the transpose, and when you are adding two 1-D arrays which have different dimensions, here of (1,5) and (5,1), MATLAB automatically casts a broadcasted matrix addition, hence both of matrices get converted to (5,5) dimension form with repeating columns and rows respectively. The output is exactly what it should be.

Answer 1

[Voss]

0:4+5*(0:4)' is the same as 0:(4+5*(0:4)')

0:(4+5*(0:4)')

ans = 1×5

0 1 2 3 4

v+5*v', where v is 0:4, is the same as (0:4)+5*(0:4)'

v = 0:4;
v+5*v'

ans = 5×5

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

(0:4)+5*(0:4)'

ans = 5×5

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24