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-
- Before trying to run Opus, please be sure to read
- INSTALL.DOC, as it contains VITAL information!!!
-
- OPUS.DOC, OUTCHART.DOC, and INSTALL.DOC are formatted for a
- standard 3-ring binder, and they may be printed directly from
- the Desktop.
-
- The sample worksheets included are:
-
- - AMORTIZE.OPS, a loan amortization calculator
- - FINCALC.OPS, a 5 function financial calculator
- - KINETICS.OPS, enzyme kinetics worksheet
- - REGR_EX.OPS, regression examples
- - SALES.OPS, demonstrates 4 different chart types
- - SERR.OPS, standard error bar example
-
- AMORTIZE.OPS was originally posted on Compuserve for Opus v. 1.02; I've
- made some minor changes in porting it to v. 2.00. First of all, the
- financial functions now return and expect negative numbers for cash
- outflows and positive numbers for cash inflows, so the payments are all
- negative numbers. Here's the original author's (name unknown- sorry)
- instructions with the changes I made:
-
- First, go to cell E4 and enter a dollar amount. Then go to cell E5 and
- type in an interest amount. Use a decimal format like 0.09.
- Next go to cell E6 and enter the number of years for the loan.
- After entering your data, press 'F1' one time and the loan will be
- calculated and an amortization table will be built.
-
- If you are calculating a loan that is longer than 4 years, just
- hit 'F1' again and the next group of months will show beginning
- with month 49. If you are calculating a 30 year home mortgate, it
- will take 8 hits on the 'F1' key to display all entries in the
- amortization table. When you hit it the 9th time, the table will
- start over again. You can clear the table by entering a 0 in cell E5
- and hitting 'F1' twice.
-
- The natural order and automatic recalculation modes must remain OFF,
- so do not alter them.
-
- Note: this worksheet only handles loans with monthly payments and with
- monthly compounding of interest.
-
- The author made clever use of circular cell references to perform a sort
- of looping in calculating loans with greater than 48 payments. Otherwise,
- one would have had to extend the table for as many cells as there might
- be periods. This worksheet is also a good example of usage of named cell
- references.
-
- FINCALC.OPS is a simple five function financial calculator that computes
- any of future value, present value, interest rate, payments, and number of
- periods when given the other four. It's usage is described within the
- worksheet. Remember, inflows are positive, while outflows are negative!
-
- KINETICS.OPS illustrates a scientific use of a spreadsheet in analyzing
- experimental data. It also contains three nice charts, two of which
- demonstrate regression techniques.
-
- REGR_EX.OPS is a regression example from the business world.
-
- SALES.OPS illustrates 4 different chart types, generated from the same
- set of simple data.
-
- SERR.OPS demostrates plotting of standard error bars for grouped data.
-
-
-