NMRPipe Processing Functions
NULL: No Change to Data.

The NULL function leaves the data unchanged. It is the default function of nmrPipe, applied when no other function is specified explicitly via the nmrPipe -fn ... argument. This is most commonly done at the head of a processing pipeline, where an input file is specified, but no explicit processing function is given, for example, as in the first line of this processing scheme:

    nmrPipe -in test.fid \
    | nmrPipe -fn EM -lb 2.0 -c 0.5   \
    | nmrPipe -fn ZF -auto            \
    | nmrPipe -fn FT                  \
    | nmrPipe -fn PS -p0 45 -p1 0 -di \
       -out test.ft1 -ov