I am a new learner in Data Mining Field, and I want to learn one of the three subjective programming langs.
Would you help me decide where to go .. Anyone who used them gimme a shout
You could give this a try: http://www.meetup.com/de/opentechschool-berlin/events/223437990/
You could also try this one: http://www.meetup.com/de/opentechschool-berlin/events/223359124/
probably each like the tools they use most frequently, but here are two reasons why I went for python:
It is open-source (MatLab isn't)
It is a high level language, you can do web-scraping, machine learning, database administration with orm, even front-end stuff with Django or flask.