How do I set the single variable data into a one dimensional array in ns2 using Tool Command Language?
I have tried by using the set command for that variable and an array but it shows an error like variable not an array.
You need to study the Tcl documentation a bit more.
For variables, assignment looks like this:
set foo 99
(set name value)
For arrays, assignment looks either like this:
set bar(foo) 99
(set array-name(member-name) value)
or
array set bar {foo 99}
(array set array-name ‹list of member-names and values›)
You can't mix assignment modes. If abc is the name of an array and def is the name of a variable, the wrong mode of assignment will give you these errors:
% set abc 99
can't set "abc": variable is array
% set def foo 99
wrong # args: should be "set varName ?newValue?"
% set def(foo) 99
can't set "def(foo)": variable isn't array
You need to keep your variables and your arrays separate and use the correct invocations at all times.
Documentation: array