diff --git a/R/legTools.R b/R/legTools.R
index 18455541cb46eb047585f3c5dbb83888f2720da1..81bd6d0ccfc77277b97ebd3f766174ffcb9fa2ff 100644
--- a/R/legTools.R
+++ b/R/legTools.R
@@ -11,18 +11,20 @@ NULL
#'
#' @title Feeding type in pig weight gain
#'
-#' @description This is an artifial dataset corresponding a experiment
-#' to study the effect of feeding type (factor with 4 categorical
-#' nominal levels) in pig weight gain. The experiment was a
-#' randomized complete design with five experimental units per
+#' @description This is an artificial data set corresponding a
+#' experiment to study the effect of feeding type (factor with 4
+#' categorical nominal levels) in pig weight gain. The experiment
+#' was a randomized complete design with five experimental units per
#' treatment level. The experimental unit was a pig. The response
-#' measured was weight gain from the beggining to the end of the
+#' measured was weight gain from the beginning to the end of the
#' experiment.
#'
#' \itemize{
-#' \item \code{ft} feeding type, a categorical factor with 4
-#' levels.
-#' \item \code{wg} weight gain (kg).
+#'
+#' \item \code{ft} feeding type, a categorical factor with 4 levels.
+#'
+#' \item \code{wg} weight gain (kg).
+#'
#' }
#'
#' @docType data
@@ -57,10 +59,13 @@ NULL
#' (t/ha) was recorded in each experimental unit.
#'
#' \itemize{
-#' \item \code{block} a categorical unordered factor with 4 levels.
-#' \item \code{variety} a categorical unordered factor with 8
-#' levels.
-#' \item \code{yield} potato yield (t/ha).
+#'
+#' \item \code{block} a categorical unordered factor with 4 levels.
+#'
+#' \item \code{variety} a categorical unordered factor with 8 levels.
+#'
+#' \item \code{yield} potato yield (t/ha).
+#'
#' }
#'
#' @docType data
@@ -99,9 +104,13 @@ NULL
#' units for each factor level in each block.
#'
#' \itemize{
-#' \item \code{block} a categorical unordered factor with 6 levels.
-#' \item \code{plow} a categorical unordered factor with 2 levels.
-#' \item \code{yield} corn yield (kg in 200 m\eqn{^2} of area).
+#'
+#' \item \code{block} a categorical unordered factor with 6 levels.
+#'
+#' \item \code{plow} a categorical unordered factor with 2 levels.
+#'
+#' \item \code{yield} corn yield (kg in 200 m\eqn{^2} of area).
+#'
#' }
#'
#' @docType data
@@ -128,10 +137,10 @@ NULL
#' @name defoliation
#'
-#' @title Bolls in cotton as function of artifitial defoliation
+#' @title Bolls in cotton as function of artificial defoliation
#'
#' @description This dataset contais the result of a real experiment to
-#' evaluate the effect of artifitial defoliation in combination with
+#' evaluate the effect of artificial defoliation in combination with
#' phenological stage of occurence on the production of cotton
#' represented by the number of bolls produced at the end of the
#' crop cycle. The experiment is a \eqn{5\times 5} factorial with 5
@@ -142,15 +151,21 @@ NULL
#' variance less than the sample mean).
#'
#' \itemize{
-#' \item \code{phenol} a categorical ordered factor with 5 levels
-#' that represent the phenological stages of the cotton plant in
-#' which defoliation was applied.
+#'
+#' \item \code{phenol} a categorical ordered factor with 5 levels that
+#' represent the phenological stages of the cotton plant in which
+#' defoliation was applied.
+#'
#' \item \code{defol} a numeric factor with 5 levels that represents the
#' artifical level of defoliation (percent in leaf area removed with
#' scissors) applied for all leaves in the plant.
-#' \item \code{rept} index for each experimenal unit in each treatment cell.
+#'
+#' \item \code{rept} index for each experimenal unit in each treatment
+#' cell.
+#'
#' \item \code{bolls} the number of bolls produced (count variable)
#' evaluated at harvest.
+#'
#' }
#'
#' @details The experiment was done in a greenhouse at Universidade
@@ -221,10 +236,13 @@ NULL
#' (t/ha) was recorded in each experimental unit.
#'
#' \itemize{
-#' \item \code{block} a categorical unordered factor with 4 levels.
-#' \item \code{variety} a categorical unordered factor with 6
-#' levels.
-#' \item \code{yield} cassava yield (t/ha).
+#'
+#' \item \code{block} a categorical unordered factor with 4 levels.
+#'
+#' \item \code{variety} a categorical unordered factor with 6 levels.
+#'
+#' \item \code{yield} cassava yield (t/ha).
+#'
#' }
#'
#' @docType data
@@ -260,10 +278,13 @@ NULL
#' (kg/plot) was recorded in each experimental unit.
#'
#' \itemize{
-#' \item \code{block} a categorical unordered factor with 4 levels.
-#' \item \code{variety} a categorical unordered factor with 7
-#' levels.
-#' \item \code{yield} sugarcane yield (kg/plot).
+#'
+#' \item \code{block} a categorical unordered factor with 4 levels.
+#'
+#' \item \code{variety} a categorical unordered factor with 7 levels.
+#'
+#' \item \code{yield} sugarcane yield (kg/plot).
+#'
#' }
#'
#' @docType data
@@ -298,14 +319,18 @@ NULL
#' experimental unit.
#'
#' \itemize{
-#' \item \code{row} the rows of the latin square that controls in
-#' one dimention. A categorical unordered factor with 5 levels.
-#' \item \code{col} the columns of the latin square that controls in
-#' one dimention perpendicular to the previus. A categorical
-#' unordered factor with 5 levels.
-#' \item \code{variety} a categorical unordered factor with 5
-#' levels.
-#' \item \code{yield} sugarcane yield (kg/plot).
+#'
+#' \item \code{row} the rows of the latin square that controls in one
+#' dimention. A categorical unordered factor with 5 levels.
+#'
+#' \item \code{col} the columns of the latin square that controls in one
+#' dimention perpendicular to the previus. A categorical unordered
+#' factor with 5 levels.
+#'
+#' \item \code{variety} a categorical unordered factor with 5 levels.
+#'
+#' \item \code{yield} sugarcane yield (kg/plot).
+#'
#' }
#'
#' @docType data
@@ -355,16 +380,21 @@ NULL
#' experimental unit.
#'
#' \itemize{
-#' \item \code{row} the rows of the latin square that controls in
-#' one dimention. A categorical unordered factor with 6 levels.
-#' \item \code{col} the columns of the latin square that controls in
-#' one dimention perpendicular to the previus. A categorical
-#' unordered factor with 6 levels.
-#' \item \code{fertil} a categorical unordered factor with 6
-#' levels that is the fertilization strategy applied. These levels
-#' are a result of treatment cells in a three incomplete factorial
+#'
+#' \item \code{row} the rows of the latin square that controls in one
+#' dimention. A categorical unordered factor with 6 levels.
+#'
+#' \item \code{col} the columns of the latin square that controls in one
+#' dimention perpendicular to the previus. A categorical unordered
+#' factor with 6 levels.
+#'
+#' \item \code{fertil} a categorical unordered factor with 6 levels that
+#' is the fertilization strategy applied. These levels are a result
+#' of treatment cells in a three incomplete factorial
#' arrangrment. See detais for more information.
-#' \item \code{yield} sugarcane yield (kg/plot).
+#'
+#' \item \code{yield} sugarcane yield (kg/plot).
+#'
#' }
#'
#' @details The levels of fertilization are in fact a combination of a
@@ -406,7 +436,8 @@ NULL
#' colors=brewer.pal(n=11, name="Spectral")))+
#' layer(with(sugarcaneYield3,
#' panel.text(x=row, y=col,
-#' label=sprintf("%s\n%0.2f", fertil, yield))))
+#' label=sprintf("%s\n%0.2f",
+#' fertil, yield))))
#'
#' aggregate(yield~row, data=sugarcaneYield3, FUN=mean)
#' aggregate(yield~col, data=sugarcaneYield3, FUN=mean)
@@ -435,15 +466,20 @@ NULL
#' experiment.
#'
#' \itemize{
-#' \item \code{litter} a categorical factor with 4 levels that
+#'
+#' \item \code{litter} a categorical factor with 4 levels that
#' represents the rows of the lattin square design and control for
#' the differences among litters.
-#' \item code{size} a categorical ordered variable that represents the
+#'
+#' \item code{size} a categorical ordered variable that represents the
#' columns of latin square desing and control for the weight of the
#' animals at the beggining of the experiment.
-#' \item \code{age} age of the animal (days) when castration was
+#'
+#' \item \code{age} age of the animal (days) when castration was
#' done. \code{controls} are the animals without castration.
-#' \item \code{wg} weight gain (kg) after 252 days.
+#'
+#' \item \code{wg} weight gain (kg) after 252 days.
+#'
#' }
#'
#' @docType data
@@ -479,11 +515,17 @@ NULL
#' (K) on corn yield in a randomized block design.
#'
#' \itemize{
-#' \item \code{block} a factor with 4 levels.
-#' \item \code{N} low (-1) and high (+1) levels of nitrogen.
-#' \item \code{P} low (-1) and high (+1) levels of phosporus.
-#' \item \code{K} low (-1) and high (+1) levels of potassium.
-#' \item \code{yield} corn yield (ton/ha).
+#'
+#' \item \code{block} a factor with 4 levels.
+#'
+#' \item \code{N} low (-1) and high (+1) levels of nitrogen.
+#'
+#' \item \code{P} low (-1) and high (+1) levels of phosporus.
+#'
+#' \item \code{K} low (-1) and high (+1) levels of potassium.
+#'
+#' \item \code{yield} corn yield (ton/ha).
+#'
#' }
#'
#' @docType data
@@ -528,13 +570,18 @@ NULL
#' fertilization.
#'
#' \itemize{
-#' \item \code{block} a factor with 4 levels.
-#' \item \code{mineral} low (-1) and high (+1) levels of mineral
+#'
+#' \item \code{block} a factor with 4 levels.
+#'
+#' \item \code{mineral} low (-1) and high (+1) levels of mineral
#' fertilization.
-#' \item \code{vinasse} low (-1) and high (+1) levels of fetilization
-#' with vinasse.
-#' \item \code{y} some response variable. The text book doesn't give
-#' any information.
+#'
+#' \item \code{vinasse} low (-1) and high (+1) levels of fetilization
+#' with vinasse.
+#'
+#' \item \code{y} some response variable. The text book doesn't give any
+#' information.
+#'
#' }
#'
#' @docType data
@@ -574,13 +621,18 @@ NULL
#' fertilization.
#'
#' \itemize{
-#' \item \code{block} a factor with 4 levels.
-#' \item \code{mineral} low (-1) and high (+1) levels of mineral
+#'
+#' \item \code{block} a factor with 4 levels.
+#'
+#' \item \code{mineral} low (-1) and high (+1) levels of mineral
#' fertilization.
-#' \item \code{cake} low (-1) and high (+1) levels of fetilization
-#' with filter cake.
-#' \item \code{y} some response variable. The text book doesn't give
-#' any information.
+#'
+#' \item \code{cake} low (-1) and high (+1) levels of fetilization with
+#' filter cake.
+#'
+#' \item \code{y} some response variable. The text book doesn't give any
+#' information.
+#'
#' }
#'
#' @docType data
@@ -619,12 +671,19 @@ NULL
#' studing the effect of NPK on the yield of sugar cane.
#'
#' \itemize{
+#'
#' \item \code{block} a local control factor with 3 levels.
+#'
#' \item \code{rept} factor with 2 levels.
+#'
#' \item \code{N} integer coded nitrogen levels (0, 1, 2).
+#'
#' \item \code{P} integer coded phosphorus levels (0, 1, 2).
+#'
#' \item \code{K} integer coded potassium levels (0, 1, 2).
+#'
#' \item \code{yield} sugar cane yield (ton/ha).
+#'
#' }
#'
#' @details There is a missprint in the book for the 9th entry, which
@@ -668,11 +727,16 @@ NULL
#' Novermber, December and January.
#'
#' \itemize{
-#' \item \code{variety} a categorical variable with 6 levels that
+#'
+#' \item \code{variety} a categorical variable with 6 levels that
#' represents mango varieties studied.
-#' \item \code{year} the year of harvesting.
-#' \item \code{month} the month of harvesting.
-#' \item \code{acid} mean of the acidity determined in 3 fruits.
+#'
+#' \item \code{year} the year of harvesting.
+#'
+#' \item \code{month} the month of harvesting.
+#'
+#' \item \code{acid} mean of the acidity determined in 3 fruits.
+#'
#' }
#'
#' @docType data
@@ -720,11 +784,17 @@ NULL
#' plus presence of limestone.
#'
#' \itemize{
-#' \item \code{N} content of nitrogen in the fertilizer.
-#' \item \code{P} content of phosphorus in the fertilizer.
-#' \item \code{K} content of potassium in the fertilizer.
-#' \item \code{limestone} presence (1) or absence of limestone (0).
-#' \item \code{acid} mean of corn yield in 16 locations (ton/ha).
+#'
+#' \item \code{N} content of nitrogen in the fertilizer.
+#'
+#' \item \code{P} content of phosphorus in the fertilizer.
+#'
+#' \item \code{K} content of potassium in the fertilizer.
+#'
+#' \item \code{limestone} presence (1) or absence of limestone (0).
+#'
+#' \item \code{acid} mean of corn yield in 16 locations (ton/ha).
+#'
#' }
#'
#' @details The experiment was carried out in 16 different locations but
@@ -774,13 +844,19 @@ NULL
#' branches in coffee trees.
#'
#' \itemize{
-#' \item \code{N} content of nitrogen in the fertilizer (low/high).
-#' \item \code{P} content of phosphorus in the fertilizer (low/high).
-#' \item \code{K} content of potassium in the fertilizer (low/high).
-#' \item \code{block} an unordered factor representing the blocks
+#'
+#' \item \code{N} content of nitrogen in the fertilizer (low/high).
+#'
+#' \item \code{P} content of phosphorus in the fertilizer (low/high).
+#'
+#' \item \code{K} content of potassium in the fertilizer (low/high).
+#'
+#' \item \code{block} an unordered factor representing the blocks
#' used.
-#' \item \code{branches} an integer variable, the number of dry
+#'
+#' \item \code{branches} an integer variable, the number of dry
#' branches in a coffee the.
+#'
#' }
#'
#' @details The experiment was carried out in a randomized block design
@@ -819,7 +895,8 @@ NULL
#' @name cottonFert
#'
-#' @title A set of experiments in different locations studing NK on cotton
+#' @title A set of experiments in different locations studing NK on
+#' cotton
#'
#' @description These data is a set of experiments carried out in
#' different locations studing NK fertilization in cotton. All the 5
@@ -828,14 +905,18 @@ NULL
#' control.
#'
#' \itemize{
-#' \item \code{trt} unordered factor, treatment that consist of 4
-#' cells from a 2^2 factorial design (\eqn{N\times K}) and a
-#' control.
-#' \item \code{rept} integer, indexes experimental units.
-#' \item \code{loc} an unordered factor representing the locations
-#' where the experiment was carried out.
-#' \item \code{y} numeric, the response variable of the
-#' experiment. The text book didn't give details.
+#'
+#' \item \code{trt} unordered factor, treatment that consist of 4 cells
+#' from a 2^2 factorial design (\eqn{N\times K}) and a control.
+#'
+#' \item \code{rept} integer, indexes experimental units.
+#'
+#' \item \code{loc} an unordered factor representing the locations where
+#' the experiment was carried out.
+#'
+#' \item \code{y} numeric, the response variable of the experiment. The
+#' text book didn't give details.
+#'
#' }
#'
#' @docType data