Arithmetic operations

Arithmetic operations
	*COMMANDS

sortword = expression

array-name( x-index) = expression
array-name( x-index, y-index) = expression
array-name( x-index, y-index, z-index) = expression

Note

spectrum-name-specifier( x-index) = expression
spectrum-name( x-index, y-index) = expression
spectrum-name( x-index, y-index, z-index) = expression

group-name[ group-number] .item-specifier = expression

where expression is
operand 〚 operator operand 〛r
operand is either a sortword or a integer constant.
and x-index, y-index and z-index
may each be one of sortword or integer constant

spectrum-name-specifier is either spectrum-name or spectrum-name[index-value].
index-value is either a sortword or a integer constant.
group-number is either a sortword or a integer constant.
item-specifier is either item-name or item-name[item-offset].
item-offset is either a sortword or a integer constant.

Evaluated expressions may be assigned to a sortword variable, i.e. a word, long or float type variable.

C precedence determines the order in which operations are performed in the absence of parentheses. Up to 6 nested pairs of parentheses are allowed.

A floating point randomised value in the range 0.0 to 1.0 may be obtained by specifying the reserved float variable RANDOM. A random integer value in the range 0 to 32767 may be accessed using the reserved word IRANDOM.

Arithmetic Operators

Maths functions

The argument should be specified in parentheses following the function name.

Example

... + EXP( A + ( B * X )) ...

Command Functions

returns the value of the group number of group identifier $-word e.g. group($x).

returns the number of items in the group identifier $-word.

returns the value of expression₁ to the power expression₂.

returns the length of the named list present in the current event.

returns the contents of an array location where the array must be initialised using VALUEARRAY in the *DATA section. Each channel can be specified by a sortword or integer constant.

returns the contents of a spectrum location defined in the *SPECTRA section. Each channel can be specified by a sortword or integer constant.

returns the contents of a data location defined in the *FORMATS section. Each item can be specified by a sortword or integer constant.

evaluates the number of bits set in the 16-bit expression.

evaluates 2 16-bit group-item parameters or sortwords as a 32-bit integer, and 3 or 4 16-bit words as a 64-bit integer (longlong).

evaluates the 64-bit absolute timestamp associated with variable, which has to be a raw data group-item parameter. The value is returned as a LONGLONG data type. Currently only supported for GREAT TDR format input data.


Goto command		Gain command