Merge two arrays one after each other by elemnets

I have an array a1=[1 2 3 4 ... 50] I also have string '*GOAL'

I want to create a single string B that can produce:

*GOAL 1

*GOAL 2

*GOAL 3

*GOAL 4

*GOAL 5

...

I want to use this string B and replace a character [$1] that is inside a text file 'Goals.txt'.

Answer 1

[KSSV]

str1 = 'GOAL ' ;
idx = 1:50 ;
str1 = repmat(str1,length(idx),1) ;
iwant = [str1,num2str(idx')]