Argument in Research Papers
An argumentative research paper needs to support your stand on an issue. An argumentative research paper is analytical, but it uses information as evidence to support its point, much as a lawyer uses evidence to make their case.
For example, you might try to find research to back up the stand that ancient Egyptian women were the first feminists. Notice that this is a very different focus than an analytical focus on the role of the mother in ancient Egyptian society--argument uses evidence to take a stand on an issue whereas analysis uses evidence to support a perspective on a topic.