This function lets the user create his portfolio's calculations and plots for further study.
stocks_obj(
  data = stocks_file(),
  cash_fix = 0,
  tax = 30,
  sectors = FALSE,
  parg = FALSE
)List. Containing the following dataframes: portfolio, transactions, cash. They have to follow the original xlsx format
Numeric. If you wish to algebraically sum a value to your cash balance
Numeric. How much [0-99] of your dividends are gone with taxes?
Boolean. Return sectors segmentation for ETFs?
Boolean. Personal argument. Used to personalize stuff, in this case, taxes changed from A to B in given date (hard-coded)
Other Investment: 
daily_portfolio(),
daily_stocks(),
etf_sector(),
splot_change(),
splot_etf(),
splot_growth(),
splot_roi(),
splot_summary(),
splot_types(),
stocks_file(),
stocks_hist(),
stocks_quote(),
stocks_report()