Re: [R] Selecting columns of a table (not consecutive) >I have a table with 10 columns and many rows. >I want to select the 3rd,4th and 10th column. >problem.
There are three Military Departments within the Department of Defense: the Department of the Army, which the United States Army is organized within. the Department of the Navy, which the United States Navy and the United States Marine Corps are organized within.
The heads of the âDoDâ Components are the Secretary of the Army, the Secretary of the Navy, the Secretary of Air Force, and the Secretary (and Deputy Secretary) of Defense.