3-196 Full Command and Function Reference
x
VAR
Type: Command
Description: Variance Command: Calculates the sample variance of the coordinate values in each of the m
columns in the current statistics matrix (ΣDAT).
The variance (equal to the square of the standard deviation) is returned as a vector of m real
numbers, or as a single real number if m = 1. The variances are computed using this formula:
1
n 1–
------------
x
i
x–()
2
i 1=
n
∑
⋅
where x
i
is the ith coordinate value in a column, is the mean of the data in this column, and
n is the number of data points.
Access: …µ
VAR
Input/Output:
Level 1/Argument 1 Level 1/Item 1
→
x
variance
→
[ x
variance1
, ..., x
variancem
]
See also: MAXΣ, MEAN, MINΣ, PSDEV, PVAR, SDEV, TOT
VARS
Type: Command
Description: Variables Command: Returns a list of the names of all variables in the VAR menu for the current
directory.
Access: !°
MEMORY DIRECTORY L VARS ( °is the left-shift of the Nkey).
Input/Output:
Level 1/Argument 1 Level 1/Item 1
→
{ global
1
... global
n
}
See also: ORDER, PVARS, TVARS
VER
CAS: Return the Computer Algebra System version number and date of release.
VERSION
Type: Command
Description: Software Version Command: Displays the software version and copyright message.
Access: …µ
VERSION
Input/Output:
Level 1/Argument 1 Level 2/Item 1 Level 1/Item 2
→
“version number” “copyright message”
VISIT
Type: Command
Description: For a specified variable, opens the contents in the command-line editor.
Access: …µ
VISIT or „˜
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