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Functions which operate on array-valued cells.
You can only use these functions on values which are already arrays.
In most cases that means on values in table columns which are declared
as array-valued. FITS and VOTable tables can have columns which contain
array values, but other formats such as CSV cannot.
-
sum( array )
- Returns the sum of all the non-blank elements in the array.
If
array
is not a numeric array, null
is returned.
-
mean( array )
- Returns the mean of all the non-blank elements in the array.
If
array
is not a numeric array, null
is returned.
-
minimum( array )
- Returns the smallest of the non-blank elements in the array.
If
array
is not a numeric array, null
is returned.
-
maximum( array )
- Returns the largest of the non-blank elements in the array.
If
array
is not a numeric array, null
is returned.
-
size( array )
- Returns the number of elements in the array.
If
array
is not an array, zero is returned.
Next Previous Up Contents
Next: Coords
Up: General Functions
Previous: Arithmetic
TOPCAT - Tool for OPerations on Catalogues And Tables
Starlink User Note253
TOPCAT web page:
http://www.starlink.ac.uk/topcat/
Author email:
m.b.taylor@bristol.ac.uk