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Topic: Question about Thread & Total
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Themis Matsoukas

Posts: 320
From: Penn State
Registered: 6/20/10
Question about Thread & Total
Posted: Jan 26, 2013 1:37 AM
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I was wondering why the error message in the example below:

Thread[Total[{{1}, {2, 3}}]]

Total::tllen: Lists of unequal length in {{1},{2,3}} cannot be added. >>

{1, 5}

On the other hand, the construction below gives the same answer without complaints:

Thread[h[{{1}, {2, 3}}]] /. h -> Total

{1, 5}




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