How do I add numbers into a sequence

Say I have a matrix [1;10;30] and I wanted a matrix that added 9 data values after each value with an added 1 which would give me [1;2;3;4;5;6;7;8;9;10;11;12;13;14;15;16;17;18;19;30;31;32;33;34;35;36;37;38;39] what code would bring me that answer?

Answer 1

[Jan]

x = [1;10;30];
y = x.' + (0:9).';
y = y(:)

Answer 2

[Image Analyst]

Even simpler, though not as general (but you didn't ask for it to be general)

v = [1:9, 10:19, 30:39]'

v = 29×1

1 2 3 4 5 6 7 8 9 10