I can define a macro of the form \csname../dirX Color\endcsname manually and use it as desired. However, I am unable to do the same thing based on the contents as read by the datatool package. The ...
In my DB the number of columns is rather large. Hence, I am trying to eliminate any columns which contain only 0 entries. The number of columns, nor the column keys, are know upfront. So, I step ...