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Rearrange matrix columns into blocks

rearranges each column of matrix `A`

= col2im(`B`

,`[m n]`

,`[M N]`

,'distinct')`B`

into a distinct
`m`

-by-`n`

block to create the matrix
`A`

of size
`M`

-by-`N`

.

For example, if `B`

consists of column vectors
`Bi(:)`

with length `m*n`

, arranged as
`B = [B1(:) B2(:) B3(:) B4(:)]`

, then ```
A = [B1 B3; B2
B4]
```

where each block `Bi`

has size
`m`

-by-`n`

.