dgunif(1)

PROGRAM
dgunif - Creates a uniform noise data set.

SYNTAX

dgunif

-o  resulting image

[-i]
    input value file (xviff file)

[-trigger]
    trigger input

[-s]
    number of vectors

[-n]
    number of points

[-m]
    minimum

[-x]
    maximum

[-d]
    data processing direction (0 = down vectors, 1 = across bands)

[-t]
    lets user choose data type of image:
     'float' (select data type),
      or 'complex' (choose data type)
       [default = float]

[-V]
    Gives the version for dgunif

[-U]
    Gives the usage for dgunif

[-P]
    Prompts for command line options

[-A [file1]]
    Creates the answer file called dgunif.ans or file1

[-a [file1]]
    Uses dgunif.ans or file1 as the answer file

DESCRIPTION
creates a one dimensional uniform noise data set. The user can specify the minimum, maximum, and signal dimensions.
If a "value file" is specified, it will contain a kernel that describes the signal ensemble to be generated. This is an viff format file. The information will be contained in a single vector of float type information. The row and column size information is irrelevant. The format of the information is as follows:
[<minimum><maximum>]
where each item enclosed in triangular brackets represents a single float. The information set in square brackets is repeated as a group one per vector.
For example if 2 vectors are specified, and the first vector has a minimum of 0.0 and maximum of 1.0, the second vector has maximum of 4.0 and maximum of 6.0, the "parameter file" will look like this:
band #1: 0.0 4.0
band #2: 1.0 6.0
The advantage of this "parameter file" is that it allows the creation of an ensemble of 1D signals that are independant of each other. Number of data sets, number of points per data set, data type, and process direction must be entered on the command line, or the defaults can be taken. If more data sets are requested than are specified in the parameter file, then an error will occur. If fewer data sets are requested than are specified, then the unused parameters will be ignored.
The resulting images may be of type FLOAT or COMPLEX.
Data can be processed with either band or vector orientation. The default data processing direction is in the vector direction. This means that data stored in multiband format will be processed as a set of data sequences, where each sequence corresponds to a pixel location, and the points of each sequence are defined by the bands corresponding to that pixel location. The direction of processing can be changed so that each band is processed as a signal (instead of each vector being a signal) by setting the -d option to 1.

The trigger input can be used to cause dgunif to re-execute when used inside cantata. No image is read from this input.

REQUIRED ARGUMENTS

-o  type: outfile
    desc: resulting image

OPTIONAL ARGUMENTS

-i  type: infile
    desc: input value file (xviff file)

-trigger
    type: infile
    desc: trigger input

-s  type: integer
    desc: number of vectors
    default: 1
    bounds: value > 0

-n  type: integer
    desc: number of points
    default: 256
    bounds: value > 0

-m  type: float
    desc: minimum
    default: 0
    bounds: no range checking

-x  type: float
    desc: maximum
    default: 1
    bounds: no range checking

-d  type: boolean
    desc: data processing direction (0 = down vectors, 1 = across bands)
    default: true

-t  type: string
    desc: lets user choose data type of image
    allowed values:
     'float' (select data type),
      or 'complex' (choose data type)

EXAMPLES
dgunif -i params.xv -o noise.xv -t float -d 0
dgunif -o test.xv -t complex -d 1

SEE ALSO
intro(1), verror(3), vgparms(3), vutils(3), ldgunif(3)

RESTRICTIONS
can only generate VFF_TYP_FLOAT and VFF_TYP_COMPLEX type images.

COPYRIGHT
Copyright 1991, University of New Mexico. All rights reserved.