summary1way
(Package: s20x) :
One-way Analysis of Variance Summary
Displays summary information for a one-way anova analysis. The lm object must come from a numerical response variable and a single factor. The output includes: (i) anova table; (ii) numeric summary; (iii) table of effects; (iv) plot of data with intervals.
● Data Source:
CranContrib
● Keywords: models
● Alias: summary1way
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rr
(Package: s20x) :
Read Data
For internal use
● Data Source:
CranContrib
● Keywords: models
● Alias: rr
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normcheck
(Package: s20x) :
Testing for normality plot
Plots two plots side by side. Firstly it draws a Normal QQ-plot of the residuals, along with a line which has an intercept at the mean of the residuals and a slope equal to the standard deviation of the residuals. If shapiro.wilk = TRUE then, in the top left hand corner of the Q-Q plot, the P-value from the Shapiro-Wilk test for normality is given. Secondly, it draws a histogram of the residuals. A normal distribution is fitted and superimposed over the histogram.
● Data Source:
CranContrib
● Keywords: hplot
● Alias: normcheck, normcheck.default, normcheck.lm
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skewness
(Package: s20x) :
Skewness Statistic
Calculates the skewness statistic of the data in "x". Values close to zero correspond to reasonably symmetric data, positive values of this measure indicate right-skewed data whereas negative values indicate left-skewness.
● Data Source:
CranContrib
● Keywords: univar
● Alias: skewness
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predict20x
(Package: s20x) :
Model Predictions for a Linear Model
Uses the main output and some error messages from R function "predict" but gives you more output. (Error messages are not reliable when used in Splus.)
● Data Source:
CranContrib
● Keywords: htest
● Alias: predict20x
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cooks20x
(Package: s20x) :
Cook's distance plot
Draws a Cook's distance plot.
● Data Source:
CranContrib
● Keywords: hplot
● Alias: cooks20x
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Calculates and prints Tukey multiple confidence intervals for contrasts in one or two-way ANOVA.
● Data Source:
CranContrib
● Keywords: models
● Alias: estimateContrasts, estimateContrasts1, estimateContrasts2
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summary2way
(Package: s20x) :
Two-way Analysis of Variance Summary
Displays summary information for a two-way anova analysis. The lm object must come from a numerical response variable and factors. The output depends on the value of page:
● Data Source:
CranContrib
● Keywords: models
● Alias: summary2way
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multipleComp
(Package: s20x) :
Multiple Comparisons
Calculates and prints the estimate, multiple 95% confidence intervals; unadjusted, Tukey and Bonferroni p-values for all possible differences in means in a one-way ANOVA.
● Data Source:
CranContrib
● Keywords: htest
● Alias: multipleComp
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stripqq
(Package: s20x) :
Strip charts and normal quantile-quantile plots
Draws strip charts and normal quantile quantile plots of x for each value of the grouping variable g
● Data Source:
CranContrib
● Keywords: hplot
● Alias: stripqq, stripqq.formula
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