PadLeft[list,n]

makes a list of length n by padding list with zeros on the left.

PadLeft[list,n,x]

pads by repeating the element x.

PadLeft[list,n,{x₁,x₂,…}]

pads by cyclically repeating the elements x_i.

PadLeft[list,n,padding,m]

leaves a margin of m elements of padding on the right.

PadLeft[list,{n₁,n₂,…}]

makes a nested list with length n_i at level i.

PadLeft[list]

pads a ragged array list with zeros to make it full.

• PadLeft[list,n,…] always returns a list of length n, except in some special cases where padding is {}.
• With padding {x₁,x₂,…,x_s}, cyclic repetitions of the x_i are effectively laid down and then the list is superimposed on top of them, with the last element of the list lying on an occurrence of x_s. »
• PadLeft[list,n,padding,-m] truncates the last m elements of list.
• A margin of Round[(n-Length[list])/2] effectively centers list.
• PadLeft[list,n,list] effectively treats list as cyclic.
• PadLeft[list,n,{xlist}] can be used to repeat an individual element that is itself a list.
• PadLeft[{},n,{x₁,x₂,…}] repeats the sequence of x_i as many times as fit in a list of length n.
• PadLeft[list,{n₁,n₂,…}] creates a full array with dimensions {n₁,n₂,…} even if list is ragged. »
• PadLeft[list,Automatic,x] pads with x to make a full array.
• Negative n_i specify to pad on the right.
• PadLeft[list,{n₁,n₂},{{x₁₁,x₁₂,…},{x₂₁,…},…}] pads by repeating the block of x_ij.
• PadLeft[list,{n₁,n₂,…},list] effectively treats list as cyclic in every dimension.
• PadLeft[list,{n₁,n₂,…},padding,{m₁,m₂,…}] uses margin m_i at level i.
• The object list need not have head List.
• PadLeft can be used on SparseArray objects.

Basic Examples  (6)

Scope  (3)

Generalizations & Extensions  (1)

Applications  (3)

Properties & Relations  (1)

Possible Issues  (1)