Problem 626. Make blocks of color

Created by Doug Hull

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{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","targetMode":"","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","targetMode":"","relationshipId":"rId2","target":"/matlab/output.xml"}],"parts":[{"partUri":"/matlab/document.xml","relationship":[],"contentType":"application/vnd.mathworks.matlab.code.document+xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<w:document xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\"><w:body><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Given a (Nx3) sequence of RGB colors, I want to create a (numRowBlocks x numColBlocks x 3) image comprising (blockSize x blockSize) blocks of those colors in a (numRowBlocks x numColBlocks) pattern.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>i.e. for this signature: makeColorBlocks(blockSize, numColBlocks, numRowBlocks, RGBvec)</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>(Using a weird RGB to make the point)</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[ >> makeColorBlocks(2, 3, 2, [1 11 10;2 22 20; 3 33 30; 4 44 40; 5 55 50; 6 66 60])\n\nans(:,:,1) =\n\n 1 1 2 2 3 3\n 1 1 2 2 3 3\n 4 4 5 5 6 6\n 4 4 5 5 6 6\n\nans(:,:,2) =\n\n 11 11 22 22 33 33\n 11 11 22 22 33 33\n 44 44 55 55 66 66\n 44 44 55 55 66 66\n\nans(:,:,3) =\n\n 10 10 20 20 30 30\n 10 10 20 20 30 30\n 40 40 50 50 60 60\n 40 40 50 50 60 60]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Though it can not be mechanically graded as such, I am looking for easy to read an understand code. Something easy to understand is preferred. Thanks to</w:t></w:r><w:r><w:t> </w:t></w:r><w:hyperlink w:docLocation=\"http://blogs.mathworks.com/pick/\"><w:r><w:t>Brett</w:t></w:r></w:hyperlink><w:r><w:t> for the question.</w:t></w:r></w:p></w:body></w:document>"},{"partUri":"/matlab/output.xml","contentType":"text/xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?><embeddedOutputs><metaData><evaluationState>manual</evaluationState><layoutState>code</layoutState><outputStatus>ready</outputStatus></metaData><outputArray type=\"array\"/><regionArray type=\"array\"/></embeddedOutputs>"}]}

Given a (Nx3) sequence of RGB colors, I want to create a (numRowBlocks x numColBlocks x 3) image comprising (blockSize x blockSize) blocks of those colors in a (numRowBlocks x numColBlocks) pattern.i.e. for this signature:
 makeColorBlocks(blockSize, numColBlocks, numRowBlocks, RGBvec)(Using a weird RGB to make the point)<pre> >> makeColorBlocks(2, 3, 2, [1 11 10;2 22 20; 3 33 30; 4 44 40; 5 55 50; 6 66 60])</pre><pre class="language-matlab">ans(:,:,1) =
</pre><pre> 1 1 2 2 3 3
 1 1 2 2 3 3
 4 4 5 5 6 6
 4 4 5 5 6 6</pre><pre class="language-matlab">ans(:,:,2) =
</pre><pre> 11 11 22 22 33 33
 11 11 22 22 33 33
 44 44 55 55 66 66
 44 44 55 55 66 66</pre><pre class="language-matlab">ans(:,:,3) =
</pre><pre> 10 10 20 20 30 30
 10 10 20 20 30 30
 40 40 50 50 60 60
 40 40 50 50 60 60</pre>Though it can not be mechanically graded as such, I am looking for easy to read an understand code. Something easy to understand is preferred. Thanks to <a href="http://blogs.mathworks.com/pick/">Brett</a> for the question.

Given a (Nx3) sequence of RGB colors, I want to create a (numRowBlocks x numColBlocks x 3) image comprising (blockSize x blockSize) blocks of those colors in a (numRowBlocks x numColBlocks) pattern.

i.e. for this signature:
  makeColorBlocks(blockSize, numColBlocks, numRowBlocks, RGBvec)

(Using a weird RGB to make the point)

>> makeColorBlocks(2, 3, 2, [1 11 10;2 22 20; 3 33 30; 4 44 40; 5 55 50; 6 66 60])
  
  ans(:,:,1) =
  
      1    1    2    2    3    3
      1    1    2    2    3    3
      4    4    5    5    6    6
      4    4    5    5    6    6
  
  
  ans(:,:,2) =
  
     11   11   22   22   33   33
     11   11   22   22   33   33
     44   44   55   55   66   66
     44   44   55   55   66   66
  
  
  ans(:,:,3) =
  
     10   10   20   20   30   30
     10   10   20   20   30   30
     40   40   50   50   60   60
     40   40   50   50   60   60

Though it can not be mechanically graded as such, I am looking for easy to read an understand code. Something easy to understand is preferred. Thanks to <http://blogs.mathworks.com/pick/ Brett> for the question.

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Last Solution submitted on Jul 11, 2021

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Solution 181909

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Alfonso Nieto-Castanon on 27 Dec 2012

this is the commented version of my previous entry (solution 181910)

Solution 82743

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@bmtran (Bryant Tran) on 26 Apr 2012

this is my original submission modified for ease of reading

Solution 82734

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@bmtran (Bryant Tran) on 26 Apr 2012

whoops, didn't see your thing about "easy to understand code."

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Problem 626. Make blocks of color

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