Extracting the column value of a table

I have a table with two columns which is symbol and value, for eg aggtc 2 agtg 2 aggc 3 etc.I want to extract the column values of symblos that is aggtc,agtg,aggc and so on how is this possible.please give me a solution.

Answer 1

[Stalin Samuel]

Let us assume that you have the table like this

table_name =

[ aggtc, 2]
[  agtg, 2]
[  aggc, 3]

then column values of symblos can be extracted by

table_name(:,1)//gives you the below result
aggtc
agtg
aggc