Compute a frequency table of a quantitative variable and plot a simple histogram and the cumulative histogram. Classes are of equal interval.

Variables to customize:

varlistindex <- 3 # index of the GTD frame variable
nclasses <- 10 # number of histogram classes 
ndecimals <- 3 # number of decimal places
linedensity <- FALSE # add line of density 
tracesdensity <- FALSE # add traces of density below histogram
absfrequency <- FALSE # absolute or relative frequencies
colour <- rgb(0,0,1,0.5) # histogram color (0 to 1) levels of red, green, blue and transparency

Plot a simple histogram of equal frequencies classes and the cumulative histogram.

Variables to customize:

varlistindex <- 11 # index of the GTD frame variable
nclasses <- 12 # number of histogram classes
ndecimals <- 3 # number of decimal places
colour <- rgb (1,1,0,0.5) # histogram color (0 to 1) levels of red, green, blue and transparency

Plot a matrix of histograms of a set of quantitative variables.

Variables to customize:

nclasses <- 10 # number of histogram classes
varlistindex <- c(5:11) # indexes of the GTD frame variables 
linedensity <- FALSE # add line of density 
absfrequency <- TRUE # absolute or relative frequencies
titleGRAPH <- "Matriz de histogramas" # title of the graphic
colour <- rgb(0,0,1,0.5) # histogram color (0 to 1) levels of red, green, blue and transparency
par(mfrow=c(2,4),mar=c(3,3,1,1), oma=c(1,1,2,1), mgp=c(2.0, 0.8, 0))  # graphical window configuration, the first two numbers are the number of rows and columns of the matrix 

Draw one or several box-plots in the same graphic.

Variables to customize:

varlistindex <- c(5:11) # indexes of the GTD frame variables
plotlog <- FALSE # log scale (FALSE or TRUE)
titleGRAPH <- "Box-plots das variáveis em estudo" #title of the graphic

Compute and display several univariate and basic statistics for one or several quantitative variables. The complete list is: minimum, maximum, mode, mean, median, Q1, Q3, variance, standard deviation, variation coeficients, IQR, range, skewness coeficient, Galton coeficient and kurtosis.

Variables to customize:

varlistindex <- c(5:11) # indexes of the GTD frame variables
ndecimals <- 3 # number of decimal places

Compute and display the intervals and the number of individuals of the 1st and 2nd order outliers (left and right) for one or several quantitative variables.

Variables to customize:

varlistindex <- c(5:11) # indexes of the GTD frame variables
ndecimals <- 3 # number of decimal places

Display a simple histogram, a cumulative histogram and the box-plot of one quantitative variable. The box-plot is aligned with the cumulative histogram.

Variables to customize:

nclasses <- 10 # number of histogram classes
varlistindex <- 5 # index of the GTD frame variable
absfrequency <- TRUE # absolute or relative frequencies
colour <- rgb(0,0,1,0.5) # histogram color (0 to 1) levels of red, green, blue and transparency

Plot two histograms of two quantitative variables in the same graphic for sake of comparision.

Variables to customize:

nclasses <- 20 # number of histogram classes
varlistindex <- c(10,11) # index of the two GTD frame variable
varunits <- c("(ppm)","(ppm)") #units of the variables
linedensity <- FALSE  # add line of density 
titleGRAPH <- "Histograms" # global title
maxY <- 0.025 # maximum frequency of the graphic
colour <- c(rgb(0,0,1,0.5),rgb(1,0,0,0.5)) # histogram colors (0 to 1) levels of red, green, blue and transparency (two colours)

Draw a stem and leaf plot.

Variables to customize:

varlistindex <- 11 # index of the GTD frame variable

Plot a bar chart or pie chart for one qualitative variable.

Variables to customize:

histtype <- 2 # option for Pie (1) or Bars (2)
varlistindex <- 4 # index of the GTD frame qualitative variable
colour <- rgb(0,0,1,0.5) # histogram colors (0 to 1) levels of red, green, blue and transparency (for bars only)

Compute and compare arithmetic mean, harmonic mean and geometric mean.

Variables to customize:

varlistindex <- 11 # index of the GTD frame variable
ndecimals <- 3 # number of decimal places

Draw a Pareto chart of a qualitative variable.

Variables to customize:

varlistindex <- 4 # index of the GTD frame variable
titleGRAPH <- "Gráfico de Pareto" # global title of the Pareto chart
colour <- rgb(0,0,1,0.5) # histogram colors (0 to 1) levels of red, green, blue and transparency