Some basic rules about the GRAPHTIME-II memories (0 to 5):
Each memory can hold up to 365 data points together with type, labels etc.
Memory 0: This is the main working memory from which all graphs are created.
(The exception is the 3-D Block chart which uses memories 1-4.)
The results of any calculation will be written to memory 0.
All stats. calculations are based on memory 0 data.
Memory 1. This is the "backup" memory. When a file is loaded from disk,
the data is copied to both memory 0 and memory 1. Any alterations
to memory 0 can be restored by either using the UNDO key (Fn 4),
or transferring data from memory 1 back into memory 0.
Memories 2 & 3: Can be used to temporarily store data files or results of
calculations. Access is via the Memory Load and Transfer commands.
Memories 4 & 5: Used internally for some commands such as Join and Stacked
columns. Can be used with caution. Memory 4 is used with the
3-D block chart. Memory 5 is used for X data values for X-Y paired
(other) data.
Subcommands:
Blank Contents Date Exchange Load Max Newscale Statistics Transfer Value Zero
Blank [MB]
Blanks the screen without altering data in memory or current scale
settings. The grid is not displayed.
Contents [MCn]
Displays on the screen the data points in any one of the six
memories (0-5). e.g. MC0 MC3
If Alter Pan [APn] has been used, MC will display points starting at the
Pan value. If the memory contains more than 63 values, use the + and - keys
to jump backwards and forwards (one page at a time).
Date [MDnn]
Takes the current system date and displays it at any selected location on
the screen in DD-MM-YYYY format. Parameters are: line number and column
starting position. e.g. MD15<RTN>28<RTN>
Exchange [MEnn]
Swap the values and labels between any two memories. For random data,
exchanging memories 0 and 5 essentially swaps all X and Y values. In this
case the X and Y labels are also exchanged.
Load [MLx]
1. Load a named data file from disk into memories 0 and 1.
e.g. MLSALES<RTN> (ML is the same as the FL command.)
or 2. Load data from a memory (1-5) into memory 0. e.g. ML2<RTN>
Avoid using numbers as filenames.
Max [MMn]
Set the end or maximum number of data points in the selected memory. Max
may be in the range 0 to 365. When a file is loaded, the max. is set to
match the number of data points. The MM command can override this.
Newscale [MN]
Resets all current scales but leaves data in memory. The screen may need
to be cleared [MB] for the next graph if the data has been modified or
appended.
Statistics [MS]
Statisics on the data currently in memory 0 are calculated and displayed
in a window placed at the upper right of the graph frame. This stats.
window may be removed immediately with the UNDO key (Fn 4). The stats.
are: Low, High, Total, Mean, Standard Deviation and XY Correlation.
(XY Correlation has a useful meaning only for X-Y paired (Other) data.)
Note: Random paired (other) data must be sorted into order before MS
will display a result.
Transfer [MTn]
Copy data from memory 0 to memory 1,2,3,4 or 5. This is useful for temporary storage of a data file (or results of a calculation) while another file is
loaded from disk into memories 0,1. (Normally only memories 2 & 3 are used
this way.) Setting up data for a 3-D block chart also uses the MT command.
e.g.s MT3 MT4
Value [MVx]
Display the exact Y value at a given X value or Date. e.g. MV 4/86<RTN>
Zero [MZn] ( n = 0-5 )
Zero data values in selected memory and set max. to 0. e.g. MZ1
If Alter Pan has been used, the pan start point will be reset.
