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fixed some ggraph issues and reorganized code.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -29,6 +29,7 @@ Imports: graphics, | |
| Suggests: datasets, | ||
| graph, | ||
| Rgraphviz, | ||
| tidygraph, | ||
| shiny, | ||
| shinythemes, | ||
| htmlwidgets | ||
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||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,167 @@ | ||
| ####################################################################### | ||
| # arulesViz - Visualizing Association Rules and Frequent Itemsets | ||
| # Copyright (C) 2021 Michael Hahsler | ||
| # | ||
| # This program is free software; you can redistribute it and/or modify | ||
| # it under the terms of the GNU General Public License as published by | ||
| # the Free Software Foundation; either version 2 of the License, or | ||
| # any later version. | ||
| # | ||
| # This program is distributed in the hope that it will be useful, | ||
| # but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| # GNU General Public License for more details. | ||
| # | ||
| # You should have received a copy of the GNU General Public License along | ||
| # with this program; if not, write to the Free Software Foundation, Inc., | ||
| # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
|
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||
| graph_ggplot2 <- function(x, | ||
| measure = "support", | ||
| shading = "lift", | ||
| control = NULL, asEdges = NULL, | ||
| ...) { | ||
| if (!is.null(asEdges) && asEdges) | ||
| graph_edges_ggplot2(x, measure, shading, control, ...) | ||
| else | ||
| graph_nodes_ggplot2(x, measure, shading, control, ...) | ||
| } | ||
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| graph_nodes_ggplot2 <- function(x, | ||
| measure = "support", | ||
| shading = "lift", | ||
| control = NULL, | ||
| ...) { | ||
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||
| if (!is.null(shading) && (all(is.na(shading)) || is.null(quality(x)[[shading]]))) | ||
| shading <- NULL | ||
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|
||
| # NULLify | ||
| label <- NULL | ||
|
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||
| control <- c(control, list(...)) | ||
| control <- .get_parameters( | ||
| control, | ||
| list( | ||
| #main = paste("Graph for", length(x), "rules"), | ||
| layout = 'stress', | ||
| circular = FALSE, | ||
| ggraphdots = NULL, | ||
|
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||
| edges = ggraph::geom_edge_link( | ||
| ### FIXME: dynamic length! | ||
| # aes_string( | ||
| # end_cap = paste0("circle(node2.", measure, ", unit = 'native')"), | ||
| # start_cap = paste0("circle(node1.", measure, ", unit = 'native')"), | ||
| # ), | ||
| # 3 mm is the radius for size 6 points | ||
| end_cap = ggraph::circle(3, "mm"), | ||
| start_cap = ggraph::circle(3, "mm"), | ||
| color = "gray80", | ||
| arrow = arrow(length = unit(2, "mm"), angle = 20, type = "closed"), | ||
| alpha = .2 | ||
| ), | ||
|
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| nodes = if (!is.null(shading)) | ||
| ggraph::geom_node_point(aes_string(size = measure, color = shading, filter = "type == 2")) | ||
| else | ||
| ggraph::geom_node_point(aes_string(size = measure, filter = "type == 2"), | ||
| color = default_colors(1), alpha = .3), | ||
|
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| nodetext = ggraph::geom_node_text(aes_string(label = "label", filter = "type == 1"), repel = TRUE), | ||
|
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| colors = default_colors(2), | ||
| engine = "ggplot2", | ||
| max = 100 | ||
| ) | ||
| ) | ||
|
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| x <- limit(x, control$max, shading, measure) | ||
| g <- associations2igraph(x) | ||
|
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| # complains about missing values for points (na.rm = TRUE does not currently work) | ||
| do.call(ggraph::ggraph, | ||
| c(list(graph = g, layout = control$layout, circular = control$circular), control$ggraphdots)) + | ||
| #ggraph::ggraph(g, layout = control$layout, circular = control$circular) + | ||
| control$edges + | ||
| control$nodes + | ||
| control$nodetext + | ||
| scale_color_gradient( | ||
| low = control$colors[2], | ||
| high = control$colors[1], | ||
| na.value = 0) + | ||
| # base_family is a problem for latex | ||
| ggraph::theme_graph(base_family = "") + | ||
| coord_cartesian(clip="off") | ||
| } | ||
|
|
||
| graph_edges_ggplot2 <- function(x, | ||
| measure = "support", | ||
| shading = "lift", | ||
| control = NULL, | ||
| ...) { | ||
|
|
||
| if (!is.null(shading) && (all(is.na(shading)) || is.null(quality(x)[[shading]]))) | ||
| shading <- NULL | ||
|
|
||
| # NULLify | ||
| label <- NULL | ||
|
|
||
| control <- c(control, list(...)) | ||
| control <- .get_parameters( | ||
| control, | ||
| list( | ||
| #main = paste("Graph for", length(x), class(x)), | ||
| layout = 'linear', | ||
| circular = TRUE, | ||
| ggraphdots = NULL, | ||
|
|
||
| edges = ggraph::geom_edge_arc( | ||
| ### FIXME: dynamic length! | ||
| # aes_string( | ||
| # end_cap = paste0("circle(node2.", measure, ", unit = 'native')"), | ||
| # start_cap = paste0("circle(node1.", measure, ", unit = 'native')"), | ||
| # ), | ||
| # 3 mm is the radius for size 6 points | ||
| aes_string(edge_colour = shading, edge_width = measure), | ||
| end_cap = ggraph::circle(3, "mm"), | ||
| start_cap = ggraph::circle(3, "mm"), | ||
| arrow = if (is(x, "rules")) | ||
| arrow(length = unit(2, "mm"), angle = 20, type = "closed") | ||
| else | ||
| NULL, | ||
| alpha = .7 | ||
| ), | ||
|
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||
| nodes = NULL, | ||
| nodetext = if (!is.null(control$circular) && !control$circular) | ||
| ggraph::geom_node_text(aes_string(label = "label"), alpha = .8, angle = 45, hjust = 1) | ||
| else | ||
| ggraph::geom_node_text(aes_string(label = "label"), alpha = .8, repel = TRUE), | ||
| colors = default_colors(2), | ||
| engine = "ggplot2", | ||
| max = 100 | ||
| ) | ||
| ) | ||
|
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||
| x <- limit(x, control$max, shading, measure) | ||
| # FIXME: reduce overplotting when shading is used is not easy in igraph | ||
| g <- associations2igraph(x, associationsAsNodes = FALSE) | ||
|
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||
| # complains about missing values for points (na.rm = TRUE does not currently work) | ||
| do.call(ggraph::ggraph, | ||
| c(list(graph = g, layout = control$layout, circular = control$circular), control$ggraphdots)) + | ||
| #ggraph::ggraph(g, layout = control$layout, circular = control$circular) + | ||
| control$edges + | ||
| control$nodes + | ||
| control$nodetext + | ||
| ggraph::scale_edge_width(range = c(0.5, 2)) + | ||
| ggraph::scale_edge_color_gradient( | ||
| low = control$colors[2], | ||
| high = control$colors[1], | ||
| na.value = 0) + | ||
| # base_family is a problem for latex | ||
| ggraph::theme_graph(base_family = "", plot_margin = margin(5, 5, 5, 5, unit = "mm")) + | ||
| # no cliping for labels | ||
| coord_cartesian(clip="off") | ||
| } |
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