Plotcqq: Difference between revisions
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===Purpose=== | ===Purpose=== | ||
Conditional quantile-quantile plot. | Conditional quantile-quantile plot. | ||
===Synopsis=== | ===Synopsis=== | ||
:vals = plotcqq(x,distname,translate) | :vals = plotcqq(x,distname,translate) | ||
===Description=== | ===Description=== | ||
Plots a conditional QQplot of a sample in vector (x). Conditional quantile plots as described in the 1986 Kafadar and Spiegelman article "An alternative to ordinary q-q plots" in Computational Statistics & Data Analysis are also available in this toolbox. | Plots a conditional QQplot of a sample in vector (x). Conditional quantile plots as described in the 1986 Kafadar and Spiegelman article "An alternative to ordinary q-q plots" in Computational Statistics & Data Analysis are also available in this toolbox. | ||
==== | ====Inputs==== | ||
* '''x''' = matrix (column vector) in which the sample data is stored. | * '''x''' = matrix (column vector) in which the sample data is stored. | ||
* '''distname''' = string, optional distribution name to assume as the parent distribution for the sample. Default value is 'normal'. | * '''distname''' = string, optional distribution name to assume as the parent distribution for the sample. Default value is 'normal'. | ||
* '''translate''' = scalar, axis translation. | * '''translate''' = scalar, axis translation. | ||
==== | |||
====Outputs==== | |||
The return value is a structure with the following fields: | The return value is a structure with the following fields: | ||
* '''q''' = quantile of the named distribution. | * '''q''' = quantile of the named distribution. | ||
* '''u''' = values at which the quantiles were evaluated. | * '''u''' = values at which the quantiles were evaluated. | ||
===Examples=== | ===Examples=== | ||
vals = plotcqq(x) | |||
vals = plotcqq(x,'normal') | vals = plotcqq(x) | ||
vals = plotcqq(x,'beta') | |||
vals = plotcqq(x,'normal') | |||
vals = plotcqq(x,'beta') | |||
===See Also=== | ===See Also=== | ||
[[plotedf]], [[plotkd]], [[plotqq]], [[plotsym]] | [[plotedf]], [[plotkd]], [[plotqq]], [[plotsym]] | ||
Latest revision as of 12:33, 9 October 2008
Purpose
Conditional quantile-quantile plot.
Synopsis
- vals = plotcqq(x,distname,translate)
Description
Plots a conditional QQplot of a sample in vector (x). Conditional quantile plots as described in the 1986 Kafadar and Spiegelman article "An alternative to ordinary q-q plots" in Computational Statistics & Data Analysis are also available in this toolbox.
Inputs
- x = matrix (column vector) in which the sample data is stored.
- distname = string, optional distribution name to assume as the parent distribution for the sample. Default value is 'normal'.
- translate = scalar, axis translation.
Outputs
The return value is a structure with the following fields:
- q = quantile of the named distribution.
- u = values at which the quantiles were evaluated.
Examples
vals = plotcqq(x)
vals = plotcqq(x,'normal')
vals = plotcqq(x,'beta')