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Further Examples: PadLeft
Padding a list
This makes a list of length by padding to the left with x's.
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Using gives padding on the right.
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Using an empty list, you can see how a cyclic padding ends on the last element of the padding.
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Now the nonempty list is superimposed on the padding.
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Here the list is padded on the right by elements.
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And here the last elements of the list are dropped.
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This treats the list as cyclic.
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This has the same effect.
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Padding a matrix
This pads a matrix to give rows and columns.
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This does the same thing, but uses a block to provide the padding.
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This shifts the matrix up row and to the left columns.
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Padding graphics
Here is a nested list.
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This represents the list using Raster. (Raster starts from the lower-left corner so the picture seems upside-down.)
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Here the list is padded.
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Here are two different paddings.
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