Question

使用ggforce包中的facet_zoom（），可以创建漂亮的缩放以突出显示绘图的某些区域。不幸的是，在y轴上放大时，原始图始终在右侧。

是否可以将原始图放在左侧？

首先查看主要图表，然后查看缩放区域，会更直观。作为示例，我想交换此图中两个构面的位置：

（未添加可重复的示例，因为我认为这是有关某种功能存在的问题。）

Answer 1

我在GitHub上对function javascript_click() { if ($("#value1").val()) { var val=$("#value1").val(); if($('#'+val).length){ $("#cnt").html($("#cnt").html()+"선택하신아이디는 " + val + " 이며 id갯수는 1개입니다.By javascript <br>"); }else{ $("#cnt").html($("#cnt").html()+"wrong value of ID <br>"); } }的{{3}}进行了调整，以将水平顺序从[缩放，原始]切换为[原始，缩放]。更改并不复杂，但是它们分散在FacetZoom函数的整个代码中，因此完整的代码相当长。

结果：

draw_panels()

current code

使用的代码（我注释掉了原始代码，其中使用了修改后的代码，并指明了其他软件包的功能软件包）

# example 1, with split = FALSE, horizontal = TRUE (i.e. default settings)
p1 <- ggplot(mtcars, aes(x = mpg, y = disp, colour = factor(cyl))) +
  geom_point() +
  theme_bw()    
p1 + ggtitle("Original") + facet_zoom(y = disp > 300)
p1 + ggtitle("Modified") + facet_zoom2(y = disp > 300)

# example 2, with split = TRUE
p2 <- ggplot(iris, aes(Petal.Length, Petal.Width, colour = Species)) +
  geom_point() +
  theme_bw()    
p2 + ggtitle("Original") + 
  facet_zoom(xy = Species == "versicolor", split = TRUE)
p2 + ggtitle("Modified") + 
  facet_zoom2(xy = Species == "versicolor", split = TRUE)

注意：library(ggplot) library(ggforce) library(grid) # define facet_zoom2 function to use FacetZoom2 instead of FacetZoom # (everything else is the same as facet_zoom) facet_zoom2 <- function(x, y, xy, zoom.data, xlim = NULL, ylim = NULL, split = FALSE, horizontal = TRUE, zoom.size = 2, show.area = TRUE, shrink = TRUE) { x <- if (missing(x)) if (missing(xy)) NULL else lazyeval::lazy(xy) else lazyeval::lazy(x) y <- if (missing(y)) if (missing(xy)) NULL else lazyeval::lazy(xy) else lazyeval::lazy(y) zoom.data <- if (missing(zoom.data)) NULL else lazyeval::lazy(zoom.data) if (is.null(x) && is.null(y) && is.null(xlim) && is.null(ylim)) { stop("Either x- or y-zoom must be given", call. = FALSE) } if (!is.null(xlim)) x <- NULL if (!is.null(ylim)) y <- NULL ggproto(NULL, FacetZoom2, shrink = shrink, params = list( x = x, y = y, xlim = xlim, ylim = ylim, split = split, zoom.data = zoom.data, zoom.size = zoom.size, show.area = show.area, horizontal = horizontal ) ) } # define FacetZoom as a ggproto object that inherits from FacetZoom, # with a modified draw_panels function. the compute_layout function references # the version currently on GH, which is slightly different from the CRAN # package version. FacetZoom2 <- ggproto( "FacetZoom2", ggforce::FacetZoom, compute_layout = function(data, params) { layout <- rbind( # has both x & y dimension data.frame(name = 'orig', SCALE_X = 1L, SCALE_Y = 1L), data.frame(name = 'x', SCALE_X = 2L, SCALE_Y = 1L), data.frame(name = 'y', SCALE_X = 1L, SCALE_Y = 2L), data.frame(name = 'full', SCALE_X = 2L, SCALE_Y = 2L), data.frame(name = 'orig_true', SCALE_X = 1L, SCALE_Y = 1L), data.frame(name = 'zoom_true', SCALE_X = 1L, SCALE_Y = 1L) ) if (is.null(params$y) && is.null(params$ylim)) { # no y dimension layout <- layout[c(1,2, 5:6),] } else if (is.null(params$x) && is.null(params$xlim)) { # no x dimension layout <- layout[c(1,3, 5:6),] } layout$PANEL <- seq_len(nrow(layout)) layout }, draw_panels = function(panels, layout, x_scales, y_scales, ranges, coord, data, theme, params) { if (is.null(params$x) && is.null(params$xlim)) { params$horizontal <- TRUE } else if (is.null(params$y) && is.null(params$ylim)) { params$horizontal <- FALSE } if (is.null(theme[['zoom']])) { theme$zoom <- theme$strip.background } if (is.null(theme$zoom.x)) { theme$zoom.x <- theme$zoom } if (is.null(theme$zoom.y)) { theme$zoom.y <- theme$zoom } axes <- render_axes(ranges, ranges, coord, theme, FALSE) panelGrobs <- ggforce:::create_panels(panels, axes$x, axes$y) panelGrobs <- panelGrobs[seq_len(length(panelGrobs) - 2)] if ('full' %in% layout$name && !params$split) { panelGrobs <- panelGrobs[c(1, 4)] } # changed coordinates in indicator / lines to zoom from # the opposite horizontal direction if ('y' %in% layout$name) { if (!inherits(theme$zoom.y, 'element_blank')) { zoom_prop <- scales::rescale( y_scales[[2]]$dimension(ggforce:::expansion(y_scales[[2]])), from = y_scales[[1]]$dimension(ggforce:::expansion(y_scales[[1]]))) indicator <- polygonGrob( x = c(0, 0, 1, 1), # was x = c(1, 1, 0, 0), y = c(zoom_prop, 1, 0), gp = gpar(col = NA, fill = alpha(theme$zoom.y$fill, 0.5))) lines <- segmentsGrob( x0 = c(1, 1), x1 = c(0, 0), # was x0 = c(0, 0), x1 = c(1, 1) y0 = c(0, 1), y1 = zoom_prop, gp = gpar(col = theme$zoom.y$colour, lty = theme$zoom.y$linetype, lwd = theme$zoom.y$size, lineend = 'round')) indicator_h <- grobTree(indicator, lines) } else { indicator_h <- zeroGrob() } } if ('x' %in% layout$name) { if (!inherits(theme$zoom.x, 'element_blank')) { zoom_prop <- scales::rescale(x_scales[[2]]$dimension(ggforce:::expansion(x_scales[[2]])), from = x_scales[[1]]$dimension(ggforce:::expansion(x_scales[[1]]))) indicator <- polygonGrob(c(zoom_prop, 1, 0), c(1, 1, 0, 0), gp = gpar(col = NA, fill = alpha(theme$zoom.x$fill, 0.5))) lines <- segmentsGrob(x0 = c(0, 1), y0 = c(0, 0), x1 = zoom_prop, y1 = c(1, 1), gp = gpar(col = theme$zoom.x$colour, lty = theme$zoom.x$linetype, lwd = theme$zoom.x$size, lineend = 'round')) indicator_v <- grobTree(indicator, lines) } else { indicator_v <- zeroGrob() } } if ('full' %in% layout$name && params$split) { space.x <- theme$panel.spacing.x if (is.null(space.x)) space.x <- theme$panel.spacing space.x <- unit(5 * as.numeric(convertUnit(space.x, 'cm')), 'cm') space.y <- theme$panel.spacing.y if (is.null(space.y)) space.y <- theme$panel.spacing space.y <- unit(5 * as.numeric(convertUnit(space.y, 'cm')), 'cm') # change horizontal order of panels from [zoom, original] to [original, zoom] # final <- gtable::gtable_add_cols(panelGrobs[[3]], space.x) # final <- cbind(final, panelGrobs[[1]], size = 'first') # final_tmp <- gtable::gtable_add_cols(panelGrobs[[4]], space.x) # final_tmp <- cbind(final_tmp, panelGrobs[[2]], size = 'first') final <- gtable::gtable_add_cols(panelGrobs[[1]], space.x) final <- cbind(final, panelGrobs[[3]], size = 'first') final_tmp <- gtable::gtable_add_cols(panelGrobs[[2]], space.x) final_tmp <- cbind(final_tmp, panelGrobs[[4]], size = 'first') final <- gtable::gtable_add_rows(final, space.y) final <- rbind(final, final_tmp, size = 'first') final <- gtable::gtable_add_grob(final, list(indicator_h, indicator_h), c(2, 6), 3, c(2, 6), 5, z = -Inf, name = "zoom-indicator") final <- gtable::gtable_add_grob(final, list(indicator_v, indicator_v), 3, c(2, 6), 5, z = -Inf, name = "zoom-indicator") heights <- unit.c( unit(max_height(list(axes$x[[1]]$top, axes$x[[3]]$top)), 'cm'), unit(1, 'null'), unit(max_height(list(axes$x[[1]]$bottom, axes$x[[3]]$bottom)), 'cm'), space.y, unit(max_height(list(axes$x[[2]]$top, axes$x[[4]]$top)), 'cm'), unit(params$zoom.size, 'null'), unit(max_height(list(axes$x[[2]]$bottom, axes$x[[4]]$bottom)), 'cm') ) # swop panel width specifications according to the new horizontal order widths <- unit.c( # unit(max_width(list(axes$y[[3]]$left, axes$y[[4]]$left)), 'cm'), # unit(params$zoom.size, 'null'), # unit(max_height(list(axes$y[[3]]$right, axes$y[[4]]$right)), 'cm'), # space.x, # unit(max_width(list(axes$y[[1]]$left, axes$y[[2]]$left)), 'cm'), # unit(1, 'null'), # unit(max_height(list(axes$y[[1]]$right, axes$y[[2]]$right)), 'cm') unit(max_width(list(axes$y[[1]]$left, axes$y[[2]]$left)), 'cm'), unit(1, 'null'), unit(max_height(list(axes$y[[1]]$right, axes$y[[2]]$right)), 'cm'), space.x, unit(max_width(list(axes$y[[3]]$left, axes$y[[4]]$left)), 'cm'), unit(params$zoom.size, 'null'), unit(max_height(list(axes$y[[3]]$right, axes$y[[4]]$right)), 'cm') ) final$heights <- heights final$widths <- widths } else { if (params$horizontal) { space <- theme$panel.spacing.x if (is.null(space)) space <- theme$panel.spacing space <- unit(5 * as.numeric(convertUnit(space, 'cm')), 'cm') heights <- unit.c( unit(max_height(list(axes$x[[1]]$top, axes$x[[2]]$top)), 'cm'), unit(1, 'null'), unit(max_height(list(axes$x[[1]]$bottom, axes$x[[2]]$bottom)), 'cm') ) # change horizontal order of panels from [zoom, original] to [original, zoom] # first <- gtable::gtable_add_cols(panelGrobs[[2]], space) # first <- cbind(final, panelGrobs[[1]], size = 'first') final <- gtable::gtable_add_cols(panelGrobs[[1]], space) final <- cbind(final, panelGrobs[[2]], size = "first") final$heights <- heights # swop panel width specifications according to the new horizontal order # unit(c(params$zoom.size, 1), 'null') final$widths[panel_cols(final)$l] <- unit(c(1, params$zoom.size), 'null') final <- gtable::gtable_add_grob(final, indicator_h, 2, 3, 2, 5, z = -Inf, name = "zoom-indicator") } else { space <- theme$panel.spacing.y if (is.null(space)) space <- theme$panel.spacing space <- unit(5 * as.numeric(convertUnit(space, 'cm')), 'cm') widths <- unit.c( unit(max_width(list(axes$y[[1]]$left, axes$y[[2]]$left)), 'cm'), unit(1, 'null'), unit(max_height(list(axes$y[[1]]$right, axes$y[[2]]$right)), 'cm') ) final <- gtable::gtable_add_rows(panelGrobs[[1]], space) final <- rbind(final, panelGrobs[[2]], size = 'first') final$widths <- widths final$heights[panel_rows(final)$t] <- unit(c(1, params$zoom.size), 'null') final <- gtable::gtable_add_grob(final, indicator_v, 3, 2, 5, z = -Inf, name = "zoom-indicator") } } final } )和create_panels是ggforce软件包中未导出的函数，因此我用三元冒号引用了它们。这对于编写软件包而言并不可靠，但作为临时解决方法就足够了。

如何从facet_zoom（）更改缩放区域的位置？

1 个答案: