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isTable -- whether something is a list of lists of equal length

Usage:

isTable t
Inputs:
- t, a thing,
Outputs:
- b, a Boolean value, whether or not $t$ is a table

Description

i1 : isTable {{1,2,3},{4,5,6}}

o1 = true

i2 : isTable {{1,2,3},{4,5}}

o2 = false

Caveat

It is intrinsically impossible to represent a $0\times k$ matrix as a list of lists.

See also

applyTable -- apply a function to each element of a table
table -- make a table from a binary function
subtable -- extract a subtable from a table
lists and sequences -- a detailed overview of lists and sequences in Macaulay2

For the programmer

The object isTable is a function closure.

The source of this document is in Macaulay2Doc/functions/table-doc.m2:125:0.