j-commands: jump to different parts of the matrix

Usage:

jx { xppm | atomname }

jy { yppm | atomname }

jz { zppm | atomname } [{ z2ppm | atomname }]

jz2 { z2ppm | atomname }

jxy { xppm | atomname } { yppm | atomname }

jxz { xppm | atomname } { zppm | atomname }

jyz { yppm | atomname } { zppm | atomname }

jxyz { xppm | atomname } { yppm | atomname } { zppm | atomname }

Description:

Each of the j-commands takes one or more arguments which can either be a numerical chemical shift value or the name of an atom whose chemical shift will be looked up. The chemical shift lookup is done using getppm. The view is then "jumped" to the specified position in the matrix while the amount of the matrix that is shown remains the same.

Note: jz takes an optional second argument for the cube to jump to in the fourth dimension.

Examples:

jx 4.2 --> the view of the matrix "slides" along the x-axis until it is centered at 4.2 ppm.

jz 62 --> jump to the plane closest to 62.0 ppm

jz 4.2 62 --> jump to the plane closest to 4.2 ppm and in the cube at 62.0 ppm

jx 43.hn 43.n --> move along the x-axis to the point where 43 amide proton is and jump to the plane of 43 amide nitrogen.

Location:

/hhmi/nv3/hhmi/j-commands.tcl