LI-COR LI-6400, Руководство пользователя

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GraphIt
Selecting Observations
12-10 Using the LI-6400
12
If you enter * (or any non-numeric entry, for that matter) for either the max
or min value, that parameter will be computed for you, based on the variables
defined for that axis.
Storing Plot Definitions
The Store Config function key ( f5 level 1) allows you to store the current plot
definition for later recall using the QuikPik Config function key ( f1 level 1).
Definitions should be stored in the directory
/User/Configs/PlotDefs
. The directo-
ry and file name are obtained from you by GraphIt using the Standard File Di-
alog.
Selecting Observations
GraphIt provides three tools for selecting data subsets for plotting or viewing.
In order of priority of implementation, they are:
1 First and Last Data Lines
Data is found by searching for non-blank lines whose first character is not a
quote ("), starting with the First Data Line. The search continues until a blank
line is found, or until the Last Data Line has been searched.
2 Use Every nth Line
Between the First and Last Data Lines, every n
th
line is converted to numbers,
provided it does not start with a quote ("). The default value of n is 1, but the
user can set this. This is useful for subsampling large data files.
3 Inclusion Based On Data Values
Once a line is converted to numbers, any variable(s) or combination thereof
can be tested to see if that observation should be included.
Picking the First and Last Observation
The starting and ending data lines can be manually selected. Press Ò Data Set
Pick Ó ( f1 level 2), then P . You will be prompted to select three lines in suc-
cession using Standard Menu: the label line, the first data line, and the ending
data line (Figure 12-9).
Note: The axes max and min arenÕt the actual data values
max and min. The axes are scaled a bit larger to encompass
the plotting symbols.