Gantt Charts in R using Plotly
[This article was first published on R – Modern Data, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
Gantt Charts are a great way to keep track of timelines, progress of specific aspects of the project and resource utilization. Project Managers and anyone familiar with Microsoft Project would be familiar with Gantt Charts.
Here’s how to make one in R using Plotly’s R API.
library(plotly) # Read in data df <- read.csv("https://cdn.rawgit.com/plotly/datasets/master/GanttChart-updated.csv", stringsAsFactors = F) # Convert to dates df$Start <- as.Date(df$Start, format = "%m/%d/%Y") # Sample client name client = "Sample Client" # Choose colors based on number of resources cols <- RColorBrewer::brewer.pal(length(unique(df$Resource)), name = "Set3") df$color <- factor(df$Resource, labels = cols) # Initialize empty plot p <- plot_ly() # Each task is a separate trace # Each trace is essentially a thick line plot # x-axis ticks are dates and handled automatically for(i in 1:(nrow(df) - 1)){ p <- add_trace(p, x = c(df$Start[i], df$Start[i] + df$Duration[i]), # x0, x1 y = c(i, i), # y0, y1 mode = "lines", line = list(color = df$color[i], width = 20), showlegend = F, hoverinfo = "text", # Create custom hover text text = paste("Task: ", df$Task[i], "<br>", "Duration: ", df$Duration[i], "days<br>", "Resource: ", df$Resource[i]), evaluate = T # needed to avoid lazy loading ) } # Add information to plot and make the chart more presentable p <- layout(p, # Axis options: # 1. Remove gridlines # 2. Customize y-axis tick labels and show task names instead of numbers xaxis = list(showgrid = F, tickfont = list(color = "#e6e6e6")), yaxis = list(showgrid = F, tickfont = list(color = "#e6e6e6"), tickmode = "array", tickvals = 1:nrow(df), ticktext = unique(df$Task), domain = c(0, 0.9)), # Annotations annotations = list( # Add total duration and total resources used # x and y coordinates are based on a domain of [0,1] and not # actual x-axis and y-axis values list(xref = "paper", yref = "paper", x = 0.80, y = 0.1, text = paste0("Total Duration: ", sum(df$Duration), " days<br>", "Total Resources: ", length(unique(df$Resource)), "<br>"), font = list(color = "#ffff66", size = 12), ax = 0, ay = 0, align = "left"), # Add client name and title on top list(xref = "paper", yref = "paper", x = 0.1, y = 1, xanchor = "left", text = paste0("Gantt Chart: ", client), font = list(color = "#f2f2f2", size = 20, family = "Times New Roman"), ax = 0, ay = 0, align = "left") ), plot_bgcolor = "#333333", # Chart area color paper_bgcolor = "#333333") # Axis area color p
To leave a comment for the author, please follow the link and comment on their blog: R – Modern Data.
R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job.
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.