see also : FILTER MAXENT PUT SHOW
NCHANNEL
- Context which holds the number of channels for multi-channel Maximum Entropy If NCHANNEL is equal to n>1, then the filter buffer is supposed to hold n different versions of the filter function (thus filter_size = n*size_of_data). n versions of the spectrum are reconstructed from the data, corresponding to the n different filters. To be active, FILTER should be set to 2, and the filter buffer loaded "by hand" with the PUT FILTER command. You can then manipulate the MaxEnt spectrum in 2D mode with the following sequence : Gifa> DIM 2 CHSIZE 1 n*size_of_one_spectrum PUT ROW 1 MODIFYSIZE n % related contexts : $NCHANNEL
see also : MAXENT
NDISP
- NDISP n During a MaxEnt process, the display will refreshed every n iteration. n=0 means never. related contexts : $NDISP
see also : dataset GETHEADER JOIN PUTHEADER
NEWFILEC
- NEWFILEC file-name dim ( parameters )(xdim) spec_freq itype dim is 1D 2D or 3D (parameters) is (size, offset, specw, freq) parameters are entered in the order : F1 {F2 {F3 } } Creates an empty data file, as described by the parameters. The file can then be filled with PUTC or with macros. e.g. newfilec data_set 2D 128 0 6000 100.13 256 0 4000 400.13 400 1 for a 1H-13C experiment on a 400MHz machine. A file connected with NEWFILEC can be JOINed and DISJOINed. However a GETC is not possible (it is a Write only acces mode).
see also : EVALN SHIFT
nice_plot
- nice_plot y option_f1 option_f2 (label y/n) title do a nice plot in 2D with projections, axes & title
NOISE
- Contains the level of noise in the data-set. When loading data (1 or 2D) the noise level is evaluated automatically from the last 10th of the data. Can also be set with EVALN. Used by INTEG and by Maximum Entropy run. related contexts : $NOISE