Não foi possível enviar o arquivo. Será algum problema com as permissões?
Diferenças
Aqui você vê as diferenças entre duas revisões dessa página.
Ambos lados da revisão anterior Revisão anterior Próxima revisão | Revisão anterior | ||
pessoais:jcfaria [2007/02/28 11:55] jcfaria |
pessoais:jcfaria [2012/08/01 19:25] (atual) jcfaria |
||
---|---|---|---|
Linha 1: | Linha 1: | ||
- | ====== Página WIKI de José Cláudio Faria ====== | + | ====== José Cláudio Faria ====== |
- | {{pessoais:i_in_the_beach_2007.png|}} | + | {{ pessoais:i_in_the_beach_2007.png}} |
- | Eu na Praia do Sul de Ilhéus, em 2007, refletindo profundamente sobre o R! | + | |
+ | Eu na Praia do Sul de Ilhéus/BA, em janeiro de 2007, refletindo profundamente sobre estatística computacional e o R!!! | ||
+ | |||
+ | Brincadeiras a parte... | ||
+ | |||
+ | **1. Quem sou** | ||
+ | |||
+ | - Engenheiro Agrônomo | ||
+ | - Mestrado e Doutorado em Produção Vegetal pela Universidade Federal de Viçosa - UFV/MG | ||
+ | - Pós-doc em estatística e experimentação agronômica (ESALQ) | ||
+ | |||
+ | |||
+ | **2. O que tenho feito profissionalmente** | ||
+ | |||
+ | - Professor de estatística e pesquisador da Universidade Estadual de Santa Cruz - UESC/BA; | ||
+ | |||
+ | - Tenho estado desenvolvendo algumas soluções computacionais voltadas para o ambiente R: | ||
+ | - Editores: | ||
+ | - Tinn-R ([[http://sourceforge.net/projects/tinn-r/]]) | ||
+ | - Vim-R-plugin ([[http://www.vim.org/scripts/script.php?script_id=2628]]) | ||
+ | - Pacotes: | ||
+ | - bpca ([[http://cran.r-project.org/web/packages/bpca/index.html]]) | ||
+ | - TinnR ([[http://cran.r-project.org/web/packages/TinnR/index.html]]) | ||
+ | - fdth ([[http://cran.r-project.org/web/packages/fdth/index.html]]) | ||
+ | - ScottKnott ([[http://cran.r-project.org/web/packages/ScottKnott/index.html]]) | ||
+ | - TukeyC ([[http://cran.r-project.org/web/packages/TukeyC/index.html]]) | ||
+ | |||
+ | |||
+ | **3. Sobre o R** | ||
+ | |||
+ | - Gostaria de tê-lo encontrado desde o início de minha carreira na área de estatística computacional! | ||
+ | |||
+ | |||
+ | **4. Sobre o futuro** | ||
+ | |||
+ | - Desejo aprofundar os conhecimentos em análise multivariada de dados no ambiente R; | ||
+ | |||
+ | - Trocar experiências com pessoas e equipes envolvidas nestas áreas. | ||
===== Tinn-R ===== | ===== Tinn-R ===== | ||
Linha 17: | Linha 54: | ||
* {{pessoais:tinn-r_figure_06.png|}} | * {{pessoais:tinn-r_figure_06.png|}} | ||
- | ===== Materiais didáticos sobre o R ===== | + | ===== Materiais sobre o R ===== |
==== Scripts ==== | ==== Scripts ==== | ||
+ | Todos os usuários estão automaticamente convidados a darem sugestões e alterarem contrutivamente todas as funções e scripts desta página. Solicito a gentileza de me enviar um [[joseclaudio.faria@terra.com.br | email]] comunicando as alterações. | ||
+ | |||
=== Introdução ao R === | === Introdução ao R === | ||
Linha 558: | Linha 597: | ||
} | } | ||
</code> | </code> | ||
+ | |||
+ | ==== Funções úteis ==== | ||
+ | === Superfície de resposta === | ||
+ | == Função plotlm3d == | ||
+ | The simple, power and very flexible function **plotlm3d** enables you to plot 3d points and/or surfaces obtained from linear methods. It was adapted from scatter3d [[http://socserv.socsci.mcmaster.ca/jfox/Misc/Rcmdr/index.html | Rcmdr package]] of John Fox and some [[ http://www.stat.wisc.edu/~deepayan | Deepayan Sarkar]] ideas. | ||
+ | |||
+ | It requires the **rgl** package that you can download from [[http://cran.r-project.org|CRAN]]. | ||
+ | |||
+ | <code> | ||
+ | #=============================================================================== | ||
+ | # Name : plotlm3d | ||
+ | # Original author: John Fox (scatter3d from package Rcmdr) | ||
+ | # Changes : Jose Claudio Faria and Duncan Murdoch | ||
+ | # Date (dd/mm/yy): 12/8/06 19:44:37 | ||
+ | # Version : v18 | ||
+ | # Aim : To plot 3d scatter, an or, surfaces with rgl package | ||
+ | #=============================================================================== | ||
+ | |||
+ | # Arguments: | ||
+ | # x variable for horizontal axis. | ||
+ | # y variable for out-of-screen axis. | ||
+ | # z variable for vertical axis (response). | ||
+ | # surface plot surface(s) (TRUE or FALSE). | ||
+ | # model one or more linear model to fit ('z ~ x + y' is the default). | ||
+ | # groups if NULL (the default), no groups are defined; if a factor, | ||
+ | # a different surface or set of surfaces is plotted for each | ||
+ | # level of the factor; in this event, the colours in plane.col | ||
+ | # are used successively for the points and surfaces. | ||
+ | # model.by.group if TRUE the function will adjust one model for each level | ||
+ | # of groups; the order of the models must be the same of the | ||
+ | # level of the. | ||
+ | # model.summary print summary or summaries of the model(s) fit (TRUE or FALSE). | ||
+ | # simple.axes whether to draw sinple axes (TRUE or FALSE). | ||
+ | # box whether to draw a box (TRUE or FALSE). | ||
+ | # xlab, | ||
+ | # ylab, | ||
+ | # zlab axis labels. | ||
+ | # surface.col vector of colours for regression planes, used in the order | ||
+ | # specified by fit. | ||
+ | # point.col colour of points. | ||
+ | # grid.col colour of grid lines on the regression surface(s). | ||
+ | # grid plot grid lines on the regression surface(s) (TRUE or FALSE). | ||
+ | # grid.lines number of lines (default, 26) forming the grid, in each of | ||
+ | # the x and z directions. | ||
+ | # sphere.factor relative size factor of spheres representing points; the | ||
+ | # default size is dependent on the scale of observations. | ||
+ | # threshold if the actual size of the spheres is less than the threshold, | ||
+ | # points are plotted instead. | ||
+ | # speed revolutions of the plot per second. | ||
+ | # revolutions number of full revolutions of the display. | ||
+ | |||
+ | plotlm3d <- function (x, y, z, | ||
+ | surface = T, | ||
+ | model = 'z ~ x + y', | ||
+ | groups = NULL, | ||
+ | model.by.group = F, | ||
+ | model.summary = F, | ||
+ | simple.axes = T, | ||
+ | box = F, | ||
+ | xlab = deparse(substitute(x)), | ||
+ | ylab = deparse(substitute(y)), | ||
+ | zlab = deparse(substitute(z)), | ||
+ | surface.col = c('blue', 'orange', 'red', 'green', | ||
+ | 'magenta', 'cyan', 'yellow', 'gray', 'brown'), | ||
+ | point.col = 'yellow', | ||
+ | grid.col = material3d("color"), | ||
+ | grid = T, | ||
+ | grid.lines = 26, | ||
+ | sphere.factor = 1, | ||
+ | threshold = 0.01, | ||
+ | speed = 0.5, | ||
+ | revolutions = 0) | ||
+ | { | ||
+ | require(rgl) | ||
+ | require(mgcv) | ||
+ | summaries <- list() | ||
+ | |||
+ | if ((!is.null(groups)) && model.by.group) | ||
+ | if (!nlevels(groups) == length(model)) | ||
+ | stop('Model number is different of the number of groups') | ||
+ | |||
+ | if ((!is.null(groups)) && (nlevels(groups) > length(surface.col))) | ||
+ | stop('Number of groups exceeds number of colors') | ||
+ | |||
+ | if ((!is.null(groups)) && (!is.factor(groups))) | ||
+ | stop('groups variable must be a factor.') | ||
+ | |||
+ | xlab; ylab; zlab | ||
+ | |||
+ | valid <- if (is.null(groups)) | ||
+ | complete.cases(x, y, z) | ||
+ | else | ||
+ | complete.cases(x, y, z, groups) | ||
+ | |||
+ | x <- x[valid] | ||
+ | y <- y[valid] | ||
+ | z <- z[valid] | ||
+ | | ||
+ | if (!is.null(groups)) | ||
+ | groups <- groups[valid] | ||
+ | |||
+ | levs <- levels(groups) | ||
+ | size <- max(c(x,y,z))/100 * sphere.factor | ||
+ | |||
+ | if (is.null(groups)) { | ||
+ | if (size > threshold) | ||
+ | spheres3d(x, y, z, color = point.col, radius = size) | ||
+ | else | ||
+ | points3d(x, y, z, color = point.col) | ||
+ | } | ||
+ | else { | ||
+ | if (size > threshold) | ||
+ | spheres3d(x, y, z, color = surface.col[as.numeric(groups)], radius = size) | ||
+ | else | ||
+ | points3d(x, y, z, color = surface.col[as.numeric(groups)]) | ||
+ | } | ||
+ | |||
+ | aspect3d(c(1, 1, 1)) | ||
+ | |||
+ | if (surface) { | ||
+ | xvals <- seq(min(x), max(x), length = grid.lines) | ||
+ | yvals <- seq(min(y), max(y), length = grid.lines) | ||
+ | | ||
+ | dat <- expand.grid(x = xvals, y = yvals) | ||
+ | |||
+ | for (i in 1:length(model)) { | ||
+ | if (is.null(groups)) { | ||
+ | mod <- lm(formula(model[i])) | ||
+ | |||
+ | if (model.summary) | ||
+ | summaries[[model[i]]] <- summary(mod) | ||
+ | |||
+ | zhat <- matrix(predict(mod, newdata = dat), grid.lines, grid.lines) | ||
+ | surface3d(xvals, yvals, zhat, color = surface.col[i], alpha = 0.5, lit = F) | ||
+ | |||
+ | if (grid) | ||
+ | surface3d(xvals, yvals, zhat, color = grid.col, alpha = 0.5, | ||
+ | lit = F, front = 'lines', back = 'lines') | ||
+ | } | ||
+ | else { # groups is not NULL | ||
+ | if (!model.by.group) { | ||
+ | for (j in 1:length(levs)) { | ||
+ | mod <- lm(formula(model[i]), subset = (groups == levs[j])) | ||
+ | |||
+ | if (model.summary) | ||
+ | summaries[[paste(model[i], '.', levs[j], sep = '')]] <- summary(mod) | ||
+ | |||
+ | zhat <- matrix(predict(mod, newdata = dat), grid.lines, grid.lines) | ||
+ | surface3d(xvals, yvals, zhat, color = surface.col[j], alpha = 0.5, lit = F) | ||
+ | |||
+ | if (grid) | ||
+ | surface3d(xvals, yvals, zhat, color = grid.col, alpha = 0.5, | ||
+ | lit = F, front = 'lines', back = 'lines') | ||
+ | |||
+ | texts3d(min(x), min(y), predict(mod, newdata = data.frame(x = min(x), y = min(y), | ||
+ | groups = levs[j])), paste(levs[j], ' '), adj = 1, color = surface.col[j]) | ||
+ | } | ||
+ | } | ||
+ | else { # model.by.group is TRUE | ||
+ | mod <- lm(formula(model[i]), subset = (groups == levs[i])) | ||
+ | |||
+ | if (model.summary) | ||
+ | summaries[[paste(model[i], '.', levs[i], sep = '')]] <- summary(mod) | ||
+ | |||
+ | zhat <- matrix(predict(mod, newdata = dat), grid.lines, grid.lines) | ||
+ | |||
+ | surface3d(xvals, yvals, zhat, color = surface.col[i], alpha = 0.5, lit = F) | ||
+ | |||
+ | if (grid) | ||
+ | surface3d(xvals, yvals, zhat, color = grid.col, alpha = 0.5, | ||
+ | lit = F, front = 'lines', back = 'lines') | ||
+ | |||
+ | texts3d(min(x), min(y), predict(mod, newdata = data.frame(x = min(x), y = min(y), | ||
+ | groups = levs[i])), paste(levs[i], ' '), adj = 1, color = surface.col[i]) | ||
+ | } | ||
+ | } | ||
+ | } | ||
+ | } | ||
+ | if(simple.axes) { | ||
+ | axes3d(c('x', 'y', 'z')) | ||
+ | title3d(xlab = xlab, ylab = ylab, zlab = zlab) | ||
+ | } | ||
+ | else | ||
+ | decorate3d(xlab = xlab, ylab = ylab, zlab = zlab, box = box) | ||
+ | |||
+ | if (revolutions > 0) { | ||
+ | start <- proc.time()[3] | ||
+ | startMatrix <- par3d("userMatrix") | ||
+ | while ((theta <- speed*(proc.time()[3] - start))/2/pi < revolutions) { | ||
+ | rgl.viewpoint(userMatrix = rotate3d(startMatrix, theta, 0, 0, 1)) | ||
+ | } | ||
+ | } | ||
+ | if (model.summary) | ||
+ | return(summaries) | ||
+ | else | ||
+ | return(invisible(NULL)) | ||
+ | } | ||
+ | </code> | ||
+ | |||
+ | == Usando a função plotlm3d == | ||
+ | <code> | ||
+ | #=============================================================================== | ||
+ | # Name : Script to test plotlm3d | ||
+ | # Author : Jose Claudio Faria and Duncan Murdoch | ||
+ | # Date (dd/mm/yy): 2012/07/01 | ||
+ | # Version : v18 | ||
+ | # Aim : To plot 3d scatter, an or, surfaces with rgl package | ||
+ | #=============================================================================== | ||
+ | |||
+ | # mtrace(plotlm3d) | ||
+ | # mtrace.off | ||
+ | |||
+ | # Example 1 | ||
+ | open3d() | ||
+ | rgl.bringtotop(stay = T) | ||
+ | with(iris, plotlm3d(Sepal.Length, Sepal.Width, Petal.Length, | ||
+ | surface = F, | ||
+ | groups = Species, | ||
+ | xlab = 'SL', | ||
+ | ylab = 'SW', | ||
+ | zlab = 'PL', | ||
+ | grid = F, | ||
+ | sphere.factor = 1)) | ||
+ | |||
+ | # Example 2 | ||
+ | open3d() | ||
+ | rgl.bringtotop(stay = T) | ||
+ | with(iris, plotlm3d(Sepal.Length,Sepal.Width, Petal.Length, | ||
+ | model = c('z ~ x + y', | ||
+ | 'z ~ x + y + I(x^2) + I(y^2) + I(x*y)'), | ||
+ | surface = T, | ||
+ | groups = Species, | ||
+ | simple.axes = F, | ||
+ | box = T, | ||
+ | xlab = 'SL', | ||
+ | ylab = 'SW', | ||
+ | zlab = 'PL', | ||
+ | grid = F, | ||
+ | sphere.factor = 1)) | ||
+ | |||
+ | # Example 3 | ||
+ | open3d() | ||
+ | rgl.bringtotop(stay = T) | ||
+ | with(iris, plotlm3d(Sepal.Length,Sepal.Width, Petal.Length, | ||
+ | model = c('z ~ x + y', | ||
+ | 'z ~ x + y + I(x^2) + I(y^2) + I(x*y)'), | ||
+ | surface = T, | ||
+ | xlab = 'SL', | ||
+ | ylab = 'SW', | ||
+ | zlab = 'PL', | ||
+ | grid = F, | ||
+ | sphere.factor = 1)) | ||
+ | |||
+ | # Example 4 | ||
+ | open3d() | ||
+ | rgl.bringtotop(stay = T) | ||
+ | with(iris, plotlm3d(Sepal.Length, Sepal.Width, Petal.Length, | ||
+ | model = c('z ~ x + y', # to setosa | ||
+ | 'z ~ x + y + I(x^2) + I(y^2) + I(x*y)', # to versicolor | ||
+ | 'z ~ I(x^3) + I(y^3)'), # to virginica | ||
+ | groups = Species, | ||
+ | model.by.group = T, | ||
+ | simple.axes = F, | ||
+ | box = F, | ||
+ | xlab = 'SL', | ||
+ | ylab = 'SW', | ||
+ | zlab = 'PL', | ||
+ | grid = F, | ||
+ | sphere.factor = 1)) | ||
+ | |||
+ | # Example 5: Netter | ||
+ | x = c( 274, 180, 375, 205, 86, 265, 98, 330, 195, 53, | ||
+ | 430, 372, 236, 157, 370) | ||
+ | y = c(2450, 3254, 3802, 2838, 2347, 3782, 3008, 2450, 2137, 2560, | ||
+ | 4020, 4427, 2660, 2088, 2605) | ||
+ | z = c( 162, 120, 223, 131, 67, 169, 81, 192, 116, 55, | ||
+ | 252, 232, 144, 103, 212) | ||
+ | |||
+ | mreg = lm(z ~ x + y) | ||
+ | ndata = data.frame(x = c(150, 274, 220, 370), y = c(4000, 2800, 3500, 3100)) | ||
+ | zpred = predict(mreg, newdata = ndata, se.fit = F) | ||
+ | |||
+ | open3d() | ||
+ | rgl.bringtotop(stay = T) | ||
+ | plotlm3d(x, y, z, | ||
+ | surface = T, | ||
+ | model = 'z ~ x + y', | ||
+ | xlab = 'x', | ||
+ | ylab = 'y', | ||
+ | zlab = 'z') | ||
+ | spheres3d(x = c(150, 274, 220, 370), y = c(4000, 2800, 3500, 3100), zpred, | ||
+ | col = 'red', radius = 60) | ||
+ | </code> | ||
+ |