Re: How to add secondary Y-axis in RStudio?

On Mar 18, 2019, at 5:21 PM, Ruiz, Ana (Clinical Pharmacology) <[email protected]<mailto:[email protected]>> wrote: Dear Sumeet, The code below is not mine but I have used it in the past: ( https://gist.github.com/jslefche/e4c0e9f57f0af49fca87) #Function for double axis########################################################### ggplot_dual_axis = function(plot1, plot2, which.axis = "x") { # Update plot with transparent panel plot2 = plot2 + theme(panel.background = element_rect(fill = NA)) grid.newpage() # Increase right margin if which.axis == "y" if(which.axis == "y") plot1 = plot1 + theme(plot.margin = unit(c(0.7, 1.5, 0.4, 0.4), "cm")) # Extract gtable g1 = ggplot_gtable(ggplot_build(plot1)) g2 = ggplot_gtable(ggplot_build(plot2)) # Overlap the panel of the second plot on that of the first pp = c(subset(g1$layout, name == "panel", se = t:r)) g = gtable_add_grob(g1, g2$grobs[[which(g2$layout$name=="panel")]], pp$t, pp$l, pp$b, pp$l) # Steal axis from second plot and modify axis.lab = ifelse(which.axis == "x", "axis-b", "axis-l") ia = which(g2$layout$name == axis.lab) ga = g2$grobs[[ia]] ax = ga$children[[2]] # Switch position of ticks and labels if(which.axis == "x") ax$heights = rev(ax$heights) else ax$widths = rev(ax$widths) ax$grobs = rev(ax$grobs) if(which.axis == "x") ax$grobs[[2]]$y = ax$grobs[[2]]$y - unit(1, "npc") + unit(0.15, "cm") else ax$grobs[[1]]$x = ax$grobs[[1]]$x - unit(1, "npc") + unit(0.15, "cm") # Modify existing row to be tall enough for axis if(which.axis == "x") g$heights[[2]] = g$heights[g2$layout[ia,]$t] # Add new row or column for axis label if(which.axis == "x") { g = gtable_add_grob(g, ax, 2, 4, 2, 4) g = gtable_add_rows(g, g2$heights[1], 1) g = gtable_add_grob(g, g2$grob[[6]], 2, 4, 2, 4) } else { g = gtable_add_cols(g, g2$widths[g2$layout[ia, ]$l], length(g$widths) - 1) g = gtable_add_grob(g, ax, pp$t, length(g$widths) - 1, pp$b) g = gtable_add_grob(g, g2$grob[[7]], pp$t, length(g$widths), pp$b - 1) } # Draw it grid.draw(g) } ################################################################ <image001.png> Ana Ruiz, Pharm.D, Ph.D Clinical Pharmacology, Sr. Director 10646 Science Center Dr., CB10, office 2439 San Diego, CA 92121 Office: 858 622 3143 Cell: 858 336 1791 Fax: 877 481 0722 From: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> On Behalf Of Singla, Sumeet K Sent: Monday, March 18, 2019 2:54 PM To: [email protected]<mailto:[email protected]> Subject: [EXTERNAL] [NMusers] How to add secondary Y-axis in RStudio? Everyone, I know this is not R discussion group but since many people here use RStudio for data plotting and visualization in conjunction with NONMEM, I thought I might get help here. Anyone knows how to add secondary Y-axis with its own “independent” scaling? Reason I said independent is because right now I can add secondary Y-axis in ggplot but its scaling is dependent as a factor of primary Y-axis and I don’t want that. I am also using GraphPad which helps in independent scaling of secondary Y-axis but the process is too long. So, any options and help will be appreciated. Thank you! Regards, Sumeet Singla Graduate Student Dpt. of Pharmaceutics & Translational Therapeutics College of Pharmacy- University of Iowa