GENERAL HELP FILES index Documentation Index intro General Introduction summary A Summary of Basic Features syntax Language Syntax GENERAL UTILITIES help On-Line Help list Create a List Structure ls List Datasets option Set Page Layout Options print Print a Dataset read Read Data Values record Toggle Session Recording rm Remove Datasets save Save Datasets system Issue a System Command wait Wait for User Response STATISTICAL SUMMARIES ave Averaging Operator condense Numerical Summaries cumsum Cumulative Sums max Compute the Maximum of a Vector mean Compute the Mean of a Vector median Compute the Median of a Vector min Compute the Minimum of a Vector num Number of True Values prop Proportion of True Values range Range of a Set of Values sd Compute Standard Deviations sum Compute the Sum of a Vector sumsq Sum of Squared Deviations of a Vector var The Variance of a Vector STATISTICAL ANALYSIS anova General Multiway ANOVA aovtable Print an ANOVA Table chisquare Contingency Table Analysis cluster Euclidean Cluster Analysis contrast Scheffe Contrasts for One-Way ANOVA cor Correlation Matrices cov Covariance Matrices density Kernel Density Estimation and Plotting gl Factor Creation for Designed Experiments hat Leverage Diagnostics line Fitting Straight Lines lowess Scatter Plot Smoothing medpolish Median Polish of a Table mstree Minimal Spanning Tree oneway One-way Analysis of Variance prcomp Principal Components regress Linear Regression Analysis smooth Robust Smoothing stepwise Stepwise Regression ttest Student t-Tests twoway Two-way Analysis of Variance GRAPHICS FUNCTIONS abline Draw a Line with a Specified Slope and Intercept boxplot Box-and-Whisker Plots density Kernel Density Estimation and Plotting dotchart Cleveland Dotplots identify Identify Points on a Graph lines Add Lines to a Plot map Draw a Map mcode Coded Matrix Displays pairs All Pairwise Scatter Plots plot Scatter Plots points Add Points to a Plot qqplot Normal Quantile-Quantile Plots segments Add Line Segments to a Plot stem Stem-and-Leaf Plots usa Print Numbers on a Map of the US (Character only) STATISTICAL TABLES binom The Binomial Distribution chisq The Chisquare Distibution f-dist The F Distribution normal The Normal Distribution poisson The Poisson Distribution t-dist The t Distribution RANDOM NUMBERS rbinom Random Binomial Deviates rnorm Random Normal Deviates rpoisson Random Poisson Deviates runif Random Uniform Deviates sample Random Samples and Permutations. SORTING AND ORDERING AND RANKING order Get Ordering Permutation parsort Partial Sorting sort Sort into Ascending Order rank Sample Ranks rev Reverse a Vector MATRICES AND VECTORS c Combine Values to form a Vector cbind Bind Values as Matrix Columns col Column Numbers diag Diagonal Matrices eigen Eigenvalue/Eigenvector Computation group Make Groups Matrix Columns length Length of a Vector matrix Create a Matrix ncol Number of Columns nrow Numbers of Rows rbind Bind Values as Matrix Rows row Row Numbers solve Solution of Linear Systems svd Singular Value Decomposition t Transpose a Matrix DATA MANIPULATION encode Encoding as a String ifelse Conditional Data Selection NA Missing Values NULL NULL Datasets rep Replicate Values seq Generate Sequences MATHEMATICAL FUNCTIONS abs Absolute Values acos Arc-cosine asin Arc-sine Function atan Arc-tangent Function ceil Smallest Integer Greater Than or Equal cos Cosine Function exp Exponential and Logarithms floor Biggest Integer Less Than or Equal gamma Gamma and Related Functions int Integer Part log Natural and Common Logarithms round Round to a Specified Accuracy sin Sine Function sqrt Square Root Function tan Tangent Function