Matrix with two diagonals: Difference between revisions
Add Mathematica/Wolfram Language implementation
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{{Draft task|Matrices}}
;Task:
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=={{header|Arturo}}==
<syntaxhighlight lang="rebol">drawSquare: function [side][
loop 1..side 'x ->
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0 1 0 0 0 0 0 0 1 0
1 0 0 0 0 0 0 0 0 1</pre>
=={{header|BQN}}==
<syntaxhighlight lang="bqn">D2 ← ∨⟜⌽∾˜⥊+⟜1↑×
D2 7</syntaxhighlight>
{{out}}
<pre>┌─
╵ 1 0 0 0 0 0 1
0 1 0 0 0 1 0
0 0 1 0 1 0 0
0 0 0 1 0 0 0
0 0 1 0 1 0 0
0 1 0 0 0 1 0
1 0 0 0 0 0 1
┘</pre>
=={{header|C}}==
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1 0 0 0 0 0 1
</pre>
=={{header|FreeBASIC}}==
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{{out}}
https://www.dropbox.com/s/ph9r28gpkp8ao8n/twoDiagonalMatrix.bmp?dl=0
=={{header|Fortran}}==
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=={{header|J}}==
Implementation:
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</syntaxhighlight>
=={{header|
K6
<syntaxhighlight lang="k">diag2: {x||x}@=:
diag2 5</syntaxhighlight>
{{out}}
<pre>(1 0 0 0 1
0 1 0 1 0
0 0 1 0 0
0 1 0 1 0
1 0 0 0 1)</pre>
=={{header|Mathematica}}/{{header|Wolfram Language}}==
<syntaxhighlight lang="Mathematica">
ClearAll[CreateMatrixWithTwoDiagonals];
CreateMatrixWithTwoDiagonals[n_Integer] :=
IdentityMatrix[n] + Reverse[IdentityMatrix[n]] -
If[OddQ[n], SparseArray[{{(n + 1)/2, (n + 1)/2} -> 1}, {n, n}], 0];
CreateMatrixWithTwoDiagonals[7] // MatrixForm
</syntaxhighlight>
{{out}}
<math>
\left(
\begin{array}{ccccccc}
1 & 0 & 0 & 0 & 0 & 0 & 1 \\
0 & 1 & 0 & 0 & 0 & 1 & 0 \\
0 & 0 & 1 & 0 & 1 & 0 & 0 \\
0 & 0 & 0 & 1 & 0 & 0 & 0 \\
0 & 0 & 1 & 0 & 1 & 0 & 0 \\
0 & 1 & 0 & 0 & 0 & 1 & 0 \\
1 & 0 & 0 & 0 & 0 & 0 & 1 \\
\end{array}
\right)
</math>
=={{header|MATLAB}}==
<syntaxhighlight lang="matlab">function A = diagdiag(N, sparse)
% Create an diagonal-diagonal square matrix.
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A(1:N+1:end) = 1;
end</syntaxhighlight>
{{
<pre>
>> diagdiag(7)
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(1,7) 1
(7,7) 1
</pre>
=={{header|Maxima}}==
<syntaxhighlight lang="maxima">
/* Function that returns a square matrix with a diagonal and antidiagonal pattern in their entries */
diags(n):=genmatrix(lambda([x,y],if x=y or x+y=n+1 then 1 else 0),n,n)$
/* Example */
diags(6);
</syntaxhighlight>
{{out}}
<pre>
matrix(
[1, 0, 0, 0, 0, 1],
[0, 1, 0, 0, 1, 0],
[0, 0, 1, 1, 0, 0],
[0, 0, 1, 1, 0, 0],
[0, 1, 0, 0, 1, 0],
[1, 0, 0, 0, 0, 1]
)
</pre>
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}
</syntaxhighlight>
=={{header|Python}}==
===Pure Python===
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=={{header|Quackery}}==
<syntaxhighlight lang="quackery"> [ [] swap dup times
[ 0 over of
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1 0 0 0 1
</pre>
=={{header|Sidef}}==
<syntaxhighlight lang="ruby">func dual_diagonal(n) {
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=={{header|Wren}}==
A terminal based solution as I don't like asking people to view external images.
<syntaxhighlight lang="
for (i in 0...n) {
for (j in 0...n) {
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