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<h1 class="declaration">function polyfitxyerr</h1>
<p>
Return an n-th order polynomial fit to the vectors X and Y, where y = f(x). The typical error of the dependent variables is given in ERROR. If a variable is given as the 4th argument, it will be overwritten with the chi squared of the fit.
<br><br><b><font size=+2>Syntax</font></b><br>
<i>result</i> = polyfitxyerr(X, Y, N, ERROR [, CHISQ])
<br><br><b><font size=+2>Arguments</font></b><br>
<table CELLSPACING=0 CELLPADDING=0>
<tr VALIGN=TOP><td nowrap>X: </td>
<td> A vector.</td></tr>
<tr VALIGN=TOP><td nowrap>Y: </td>
<td> A vector.</td></tr>
<tr VALIGN=TOP><td nowrap>N: </td>
<td> An integer number.</td></tr>
<tr VALIGN=TOP><td nowrap>ERROR: </td>
<td> The error of the Y-values. If this is a real number, all X-values are assumed to have the same error. If ERROR is a vector, it must have the same length as X and Y and gives the error or each individual X value.</td></tr>
<tr VALIGN=TOP><td nowrap>CHISQ: </td>
<td> If set to a named variable, the variable is overwritten with the chi-squared of the fit.</td></tr>
</table>
<br><br><b><font size=+2>See also</font></b><br>
<a href = "function_polyfit.html">function polyfit</a><br>
<a href = "function_polyfitxy.html">function polyfitxy</a><br>
<a href = "function_polyfit2d.html">function polyfit2d</a><br>
<a href = "function_polyfit2derr.html">function polyfit2derr</a><br>
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