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<head><title>diagonalMatrix(Matrix) -- make a diagonal matrix from entries of a matrix</title>
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<div><h1>diagonalMatrix(Matrix) -- make a diagonal matrix from entries of a matrix</h1>
<div class="single"><h2>Synopsis</h2>
<ul><li><div class="list"><dl class="element"><dt class="heading">Usage: </dt><dd class="value"><div><tt>diagonalMatrix m</tt></div>
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<li><span>Function: <a href="_diagonal__Matrix.html" title="make a diagonal matrix">diagonalMatrix</a></span></li>
<li><div class="single">Inputs:<ul><li><span><tt>m</tt>, <span>a <a href="___Matrix.html">matrix</a></span></span></li>
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<li><div class="single">Outputs:<ul><li><span><span>a <a href="___Matrix.html">matrix</a></span>, a diagonal matrix whose diagonal entries are the entries of m</span></li>
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<div class="single"><h2>Description</h2>
<div><table class="examples"><tr><td><pre>i1 : R = QQ[a..d];</pre>
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<tr><td><pre>i2 : diagonalMatrix vars R
o2 = | a 0 0 0 |
| 0 b 0 0 |
| 0 0 c 0 |
| 0 0 0 d |
4 4
o2 : Matrix R <--- R</pre>
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If the matrix has more than one row, the first column is placed on the diagonal first, then the second column, etc.<table class="examples"><tr><td><pre>i3 : diagonalMatrix matrix{{0,2},{4,6}}
o3 = | 0 0 0 0 |
| 0 4 0 0 |
| 0 0 2 0 |
| 0 0 0 6 |
4 4
o3 : Matrix ZZ <--- ZZ</pre>
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<div class="single"><h2>See also</h2>
<ul><li><span><a href="_matrices.html" title="">matrices</a></span></li>
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