CSS / spec Manual : Four-Circle Functions

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Contents -> FOUR-CIRCLE REFERENCE -> Four-Circle Functions

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You can access the four-circle calculations through spec's user-hook routine calc(). The table below summarizes the calculations available.

Function	Alias	Description

`calc(1)`	calcA	Calculate motor positions for current `H K L`.
`calc(2)`	calcHKL	Calculate `H K L` for motor positions in `A[]`.
`calc(4)`	calcG	Recalculate orientation matrix.
`calc(5)`	calcZ	Calculate and for zone feature.
`calc(7,0)`	calcD	Calculate direct lattice from reciprocal parameters.
`calc(7,1)`	calcR	Calculate reciprocal lattice from direct parameters.
`calc(8)`	calcE	Calculate lambda for current monochromator positions.
`calc(9)`	calcM	Calculate monochromator position for current lambda.
`calc(10)`	_begUB	Initialize sums for fitting UB.
`calc(11)`	_addUB	Add a reflection to fitting sums.
`calc(12)`	_fitUB	Fit UB.
`calc(13)`	calcL	Calculate lattice parameters from UB.