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.
Also used to hold random data pairs for files larger than 365
points. (Max. random file size is 730 data points.)
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
random (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. (0 to 730 for random data files)
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 correct 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.
