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<head><title>MutableMatrix _ Sequence = Thing -- assignment to an element of a mutable matrix</title>
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<div><h1>MutableMatrix _ Sequence = Thing -- assignment to an element of a mutable 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>f_(i,j) = r</tt></div>
</dd></dl>
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</li>
<li><span>Operator: <a href="__us.html" title="a binary operator, used for subscripting and access to elements">_</a></span></li>
<li><div class="single">Inputs:<ul><li><span><tt>f</tt>, <span>a <a href="___Mutable__Matrix.html">mutable matrix</a></span></span></li>
<li><span>a pair <tt>(i,j)</tt> of integers</span></li>
<li><span><tt>r</tt>, <span>a <a href="___Thing.html">thing</a></span></span></li>
</ul>
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</li>
<li><div class="single">Consequences:<ul><li>the <tt>(i,j)</tt> entry of <tt>f</tt> is replaced by the ring element <tt>r</tt></li>
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<div class="single"><h2>Description</h2>
<div><table class="examples"><tr><td><pre>i1 : R = QQ[a..d]
o1 = R
o1 : PolynomialRing</pre>
</td></tr>
<tr><td><pre>i2 : f = mutableMatrix vars R
o2 = | a b c d |
o2 : MutableMatrix</pre>
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<tr><td><pre>i3 : f_(0,2)
o3 = c
o3 : R</pre>
</td></tr>
<tr><td><pre>i4 : f_(0,2) = 7*c^2
2
o4 = 7c
o4 : R</pre>
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<tr><td><pre>i5 : f
o5 = | a b 7c2 d |
o5 : MutableMatrix</pre>
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