Set the Attributes of ARRAYs

These are the items which can be set for ARRAY GQEs:

/nc$*$olour=int_expr

The number of colours that are used for a display. The colour table of an ARRAY has 256 different element, each is a triple of RGB values [0,255]x[0,255]x[0,255]. Not all of them are necessarily used.

If SPECTRA finds the symbol use_colour_table, it fills the colour table from the file gra_colour_table (logical name). If the logical name does not exist, it reads online_dir:colour_table.dat. This file consists of three column (red, green, blue), each varying from 0 to 1.

/col$*$umn=int_expr

/row=int_expr

The number of columns/rows.

/com_$i$=text_expr

The comment lines, maximum is 10.

/ct_b$*$lue[=gqe_id]

/ct_green[=gqe_id]

/ct_re$*$d[=gqe_id]

Fills the ARRAY colour table. gqe_id is a SCAN or ARRAY, wich has not more than 256 elemets. Each element is in the range [0,255].

If gqe_id is not supplied, SPECTRA chooses a default: The selected colour varies from 0 to maximum intensity.

See the section 10.5 for details about the colour concept.

/ct_grey

]

/ct_ra$*$ndom

] Sets the ARRAY colour table to a grey scale or random colours.

/data_t$*$ype=int_expr

Determines how the elements of the ARRAY have to be interpreted.

1 - float (4B) 2 - int (4B) 3 - short (2B) 4 - char (1B)

/delta_c$*$oloumn=int_expr

/delta_r$*$ow=int_expr

The number of columns/rows that are displayed.

/sc$*$ale=int_expr

Determines how the ARRAY is displayed.

0 - mod(data, colour_table) 1 - mod(log(data), colour_table)

/start_c$*$oloumn=int_expr

/start_r$*$ow=int_expr

First column/row to be displayed.

/x_min_view=float_expr

/y_min_view=float_expr

The lower left corner of the viewport. It can also be changed by the locator. There is no need to enter also the other viewport limits because ARRAYS are displayed as pixel maps.