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@@ -8873,6 +8873,10 @@ Conversion of a <i>mat</i> object into <i>colvec</i>, <i>rowvec</i> or <i>std::v
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+<b>Caveat:</b> to convert an expression that results in a 1x1 matrix to a pure scalar value, use <a href="#as_scalar">as_scalar()</a>
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+<br>
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 Examples:
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