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Examination and manipulation of data

• The contents of a slot can be written out by use of the TYPE command. In image mode, this types out a 5 by 19 subset at the requested coordinate position. The default is to centre the region on the coordinates given by X_CENTRE and Y_CENTRE, but the options /CURSOR and /HAND are also available.

  In list mode, 5 headed columns are printed with the range of lines being optional arguments. In this case there is also an optional qualifier SPECIFY which accepts three other arguments which is interpreted as the start and end rows, and the first column from which the output is to begin.

  The /PRINT option formats a temporary printronix file of this information, and submits it to the print queue.

• REPLACE allows the user to data values of either type, to user specified numbers. Various qualifiers can be used such as /ENTRY, /ROW etc.
• STATS obtains statistics for list column or image data. (ie. mean, min, max, standard-deviation etc.)
• INVALIDATE sets parts of a list or image to be flagged invalid. There are many options, such as use of cursor ( /CURSOR) and cutting out zero-order spectra ( /ZERO).
• CLEAN removes the missing values from a list, or replaces them with user supplied values for an image. In the list case the column which is to be searched for invalids is prompted for.