Identity matrix: Difference between revisions
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{{Primitive}}
Given a positive integer argument ''n'', '''identity matrix''' returns a ''n''×''n'' matrix with ones in the main diagonal and zeros elsewhere.<syntaxhighlight lang=text>
=5
(1 0 0 0 0
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=0
()
</syntaxhighlight>This primitive is not available in all dialects, It can be implemented in K as:<syntaxhighlight lang=text>
im:{(2#x)#1,&x}
im[4]
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0 0 1 0
0 0 0 1)
</syntaxhighlight>
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