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-<html><head><title>Estimate measurement results including confidence intervals</title>
-<link rel="stylesheet" type="text/css" href="Rchm.css">
-</head>
-<body>
-
-<table width="100%"><tr><td>calpredict(chemCal)</td><td align="right">R Documentation</td></tr></table><object type="application/x-oleobject" classid="clsid:1e2a7bd0-dab9-11d0-b93a-00c04fc99f9e">
-<param name="keyword" value="R: calpredict">
-<param name="keyword" value=" Estimate measurement results including confidence intervals">
-</object>
-
-
-<h2>Estimate measurement results including confidence intervals</h2>
-
-
-<h3>Description</h3>
-
-<p>
-This function generates estimates for x values from y values, including
-a confidence interval for the x values. The formulas in this function used
-for prediction of concentrations from (replicate) measurements are taken from
-the "Handbook of Chemometrics and Qualimetrics Part A" by D. L. Massart,
-Vandeginste, B. G. M., Buydens, L. M. C., De Jong, S., Lewi, P. J. and
-Smeyers-Verbeke, J, Elsevier, Amsterdam, 1997 and from the EURACHEM/CITAC
-report on "Quantifying uncertainty in analytical measurement", 2000,
-pp. 111f.
-</p>
-
-
-<h3>Usage</h3>
-
-<pre>
- calpredict(yobs,xi,yi,xunit="",level=0.95,intercept=FALSE,syobs=FALSE)
-</pre>
-
-
-<h3>Arguments</h3>
-
-<table summary="R argblock">
-<tr valign="top"><td><code>yobs</code></td>
-<td>
-A numeric vector containing the observed data.
-</td></tr>
-<tr valign="top"><td><code>xi</code></td>
-<td>
-A vector of x values of the calibration.
-</td></tr>
-<tr valign="top"><td><code>yi</code></td>
-<td>
-A vector of y values of the calibration.
-</td></tr>
-<tr valign="top"><td><code>xunit</code></td>
-<td>
-The unit of the given values on the x axis as a character string.
-</td></tr>
-<tr valign="top"><td><code>level</code></td>
-<td>
-The desired confidence level for the confidence interval of the
-estimates. Defaults to 0.95.
-</td></tr>
-<tr valign="top"><td><code>intercept</code></td>
-<td>
-Logical value determining if an intercept is to be fitted or not.
-Default is FALSE.
-</td></tr>
-<tr valign="top"><td><code>syobs</code></td>
-<td>
-If TRUE, a standard deviation for the given y values is
-calculated, and the resulting confidence interval will
-include this variability (not validated yet). If FALSE (default), this
-standard deviation is not included in the
-confidence interval. If a numeric value is given,
-it is used for the standard deviation of "real samples",
-in addition to the standard deviation of the y values
-in the calibration (also not validated yet).
-</td></tr>
-</table>
-
-<h3>Value</h3>
-
-<p>
-A list containing the estimate, its standard deviation and its
-confidence interval.</p>
-
-<h3>Author(s)</h3>
-
-<p>
-Johannes Ranke
-<a href="mailto:jranke@uni-bremen.de">jranke@uni-bremen.de</a>
-<a href="http://www.uft.uni-bremen.de/chemie/ranke">http://www.uft.uni-bremen.de/chemie/ranke</a>
-</p>
-
-
-<h3>Examples</h3>
-
-<pre>
-data(pahCalibration)
-attach(pahCalibration)
-y &lt;- c(51.2,51.4,51.1,51.8)
-estimate &lt;- calpredict(y,conc,acenaphthene,xunit="mg/L")
-</pre>
-
-
-
-<hr><div align="center"><a href="00Index.html">[Package Contents]</a></div>
-
-</body></html>

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