Reference Guide

Full Command and Function Reference 3-41
Example: Factorize the following:
x
2
5x 6+ +
Command: COLLECT(X^2+5*X+6)
Result: (X+2)(X+3)
See also: COLCT, EXPAND, FACTOR
COLΣ
Type: Command
Description: Column Sigma Command: Specifies the independent-variable and dependent-variable columns of
the current statistics matrix (the reserved variable ΣDAT).
COLΣ combines the functionality of XCOL and YCOL. The independent-variable column
number x
xcol
is stored as the first parameter in the reserved variable ΣPAR (the default is 1). The
dependent-variable column number x
ycol
is stored as the second parameter in the reserved variable
ΣPAR (the default is 2).
COLΣ accepts and stores noninteger values, but subsequent commands that use these two
parameters in ΣPAR will cause errors.
Access: …µ COL Σ
Input/Output:
Level 2/Argument 1 Level 1/Argument 2 Level 1/Item 1
x
col
y
col
→
Example: 2 5 COLΣ sets column 2 in ΣDAT as the independent-variable column, sets column 5 as the
dependent-variable column, and stores 2 and 5 as the first and second elements in ΣPAR.
See also: BARPLOT, BESTFIT, CORR, COV, EXPFIT, HISTPLOT, LINFIT, LOGFIT, LR, PREDX,
PREDY, PWRFIT, SCATRPLOT, XCOL, YCOL
COMB
Type: Function
Description: Combinations Function: Returns the number of possible combinations of n items taken m at a
time. The following formula is used:
C
n m,
n
!
m! n m–( )!⋅
-------------------------------=
The arguments n and m must each be less than 10
12
. If n<m, zero is returned.
Access: !´L PROBABILITY COMB ( ´ is the left-shift of the Pkey).
Flags: Numerical Results (–3)
Input/Output:
Level 2/Argument 1 Level 1/Argument 2 Level 1/Item 1
n m
→
C
n;m
'symb
n
' m
→
'COMB(symb
n
,m)'
n 'symb
m
'
→
'COMB(n, symb
m
)'
'symb
n
' 'symb
m
'
→
'COMB(symb
n
,symb
m
)'
See also: FACT, PERM, !
CON
Type: Command
Description: Constant Array Command: Returns a constant array, defined as an array whose elements all have
the same value.