Write a scientific paper is usully hard and complex. You have to learn about your specific subject and others fields as study design, methodology, data analyses, statistics and scientific writing. Specially in statistics, one question is about what software should I use. Hardly I perceived that you need to re-learn mathematics, alghoritms, programming language, graphics, tests, and a lot of knowledge if you want to do a great job.
The R Software is a free software that enables you to program your analysis and get graphics in the way you want.
I have some difficulty in the beginning but the site www.statmethods.net and various guidelines in internet can guide you to success. Good luck!