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-
-
- Retail Prices Index
-
- by
-
- Eddie Lord
-
-
- This file contains a programme to calculate comparitive prices using the
- RPIindex from 1925 to 1990. This was rebased in 1987.
-
- The program is self explanatory. Dates can be entered as 1990 or as 90
- (for example).
-
- This is just one programme in a collection of programmes that I
- originally wrote for the Master. Other include Interest calculations,
- Long Wave business cycles along with some photographic software.
-
- Any correction, rhubarbs or other ideas to me please, via Norwich
- Computers.
-
- 23 September 1990.
-
- ===============================
- Modification by David Holden
- ===============================
-
- The original program took the RPI from DATA statements inside the
- program. This made it rather inflexible as although it was possible to
- add extra years you would have to 'hack' the program to do so. Not only
- would you have to add extra DATA statements but change the end year,
- which was fixed at 1990.
-
- I therefore put the RPI data into an external text file called 'Index'
- in the application directory. This is a bit inflexible so you will need
- to be careful if you alter it, but it is a lot easier than changing the
- program itself. I have not changed the main program structure. This is a
- bit 'delicate' as it uses INPUT statements so beware of what you type,
- there is no trappimg for sill input data. (GIGO)
-
- The first year is now the year on the first line of the file. After this
- come the indexes for all the following years. There must not be any
- blank lines, and there must not be any spaces between the start of a
- line and the index. If you want to add comments you can put them on any
- line after the actual index (I've included the decades to demonstrate
- this). I have used Eddie Lord's original data from the years 1925 to
- 1990, but it should now be possible to extend this backwards and
- forwards fairly easily.
-
- As a 'double check' that the data has been entered correctly, if you
- hold down either ALT key when you start up the program it will print out
- a list of the years and the RPI's before it runs. Paging is enabled to
- stop it all scrolling by to fast so you will need to press SHIFT to see
- the next whole list. (Tip - hold down CTRL otherwise it will zoom past
- too quickly).
-
- If you extend the years before 1900 or after 1999 everything should
- still work OK, but beware of using just the decades instead of the full
- year. If you enter '35' as a year it will always be interpretted as
- 1935, no matter what start and end years you have used for your data.
-
- David Holden - Archimedes Public Domain Library - March 1995
-
-