AIPS HELP file for PCHIS in 31DEC21
As of Sat May 15 14:20:40 2021
PCHIS: Task to generate a histogram plot file from text file
INNAME Image name(name).
INCLASS Image name(class).
INSEQ 0.0 9999.0 Image name(seq. #). 0=>high
INDISK 0.0 9.0 Disk drive #. 0=>any
Text file with plot info
APARM Controls over plot
(1,2) Column value plot
(3,4) Histogram value plot
(5) which of the N to plot
(6) how many sigma 0 -> 4
FUNCTYPE 'LG' else linear
NBOXES Number boxes <= 1024
LTYPE -410.0 410.0 Type of labeling: 1 border,
2 no ticks, 3 standard, 4 rel
to center, 5 rel to subim cen
6 pixels, 7-10 as 3-6 with
only tick labels
<0 -> no date/time
XYRATIO 0.0 XYratio scale plot
DOTV -1.0 1.0 > 0 Do plot on the TV, else
make a plot file
GRCHAN 0.0 8.0 Graphics channel 0 => 1.
Use: PCHIS will write commands to a plot file for the execution of a
histogram plot for an arbitrary data file. The input text file
contains up to 100 columns of numbers and APARM(5) selects which
column is used to produce the histogram plot. The mean and rms
of the histogram are computed and the mean and 5 * rms to each
side of the mean are plotted.
This task was written to plot the output of PCRMS but is
sufficiently general that it may have other applications.
INNAME......Image name (name). Standard defaults. The plot file
is attached to this AIPS file which is otherwise ignored.
INCLASS.....Image name (class). Standard defaults.
INSEQ.......Image name (seq. #). 0 => highest.
INDISK......Disk unit #. 0 => any.
INTEXT......Text file containing columns of numbers. Each line in
the file may be up to 1000 characters in length and may
contain up to 100 numbers. The first invalid number on
the line terminates the parsing of the line. The file
may contain up to 100000 lines. It may contain comment
lines which must start with $ or # in column 1.
APARM.......(1,2) Column value range. If APARM(2) <= APARM(1),
(3,4) Histogram value range. If APARM(4) <= APARM(3),
(5) which column to plot 0 -> 1
(6) how many sigma out to count as excess 0 -> 4
FUNCTYPE....'LG' do log histogram, else linear
Note APARM(3) and APARM(4) are in log10 of the
histogram value on 'LG'.
NBOXES......Number boxes in histogram 0 -> 128 (<= 1024)
LTYPE.......Labelling type, see HELP LTYPE for details:
1 = border, 2 = no ticks, 3 or 7 = standard, 4 or 8 =
relative to ref. pixel, 5 or 9 = relative to subimage
(BLC, TRC) center, 6 or 10 = pixels. 7-10 all labels
other than tick numbers and axis type are omitted.
Less than 0 is the same except that the plot file
version number and create time are omitted.
Add n * 100 to alter the metric scaling.
DOTV........> 0 => plot directly on the TV device, otherwise
make a plot file for later display on one or
more devices (including the TV if desired).
GRCHAN......Graphics channel (1 - 7) to use for line drawing.
0 => 1.