Wolfram ResearchPRODUCTSPURCHASEFOR USERSCOMPANYOUR SITES
THIS IS DOCUMENTATION FOR AN OBSOLETE PRODUCT.
SEE THE DOCUMENTATION CENTER FOR THE LATEST INFORMATION.

Documentation / Mathematica / Built-in Functions / Lists and Matrices / List Operations /

Further Examples: PadLeft

Padding a list

This makes a list of length by padding to the left with x's.

In[1]:=

Out[1]=

Using gives padding on the right.

In[2]:=

Out[2]=

Using an empty list, you can see how a cyclic padding ends on the last element of the padding.

In[3]:=

Out[3]=

Now the nonempty list is superimposed on the padding.

In[4]:=

Out[4]=

Here the list is padded on the right by elements.

In[5]:=

Out[5]=

And here the last elements of the list are dropped.

In[6]:=

Out[6]=

This treats the list as cyclic.

In[7]:=

Out[7]=

This has the same effect.

In[8]:=

Out[8]=

Padding a matrix

This pads a matrix to give rows and columns.

In[9]:=

Out[9]//MatrixForm=

This does the same thing, but uses a block to provide the padding.

In[10]:=

Out[10]//MatrixForm=

This shifts the matrix up row and to the left columns.

In[11]:=

Out[11]//MatrixForm=

Padding graphics

Here is a nested list.

In[12]:=

Out[12]//MatrixForm=

This represents the list using Raster. (Raster starts from the lower-left corner so the picture seems upside-down.)

In[13]:=

Here the list is padded.

In[14]:=

Out[14]//MatrixForm=

In[15]:=

Here are two different paddings.

In[16]:=

Out[16]//MatrixForm=

In[17]:=

In[18]:=

Out[18]//MatrixForm=

In[19]:=



Any questions about topics on this page? Click here to get an individual response.Buy NowMore Information


 © 2009 Wolfram Research, Inc.  Terms of Use  Privacy Policy | [ja] |
Sign up for our newsletter: