Two X-axis in Plotly for R - r

Question

https://community.plot.ly/t/how-to-plot-multiple-x-axis-in-plotly-in-r/3014/3?u=him4u324
I have posted my question on Plotly community as well
I am trying to display two x-axis with common Y-axis on plotly for R. I was able to do so as well but starting point for each x-axis is separated from each other Whereas I wish them to be represented a common y-axis.
f1 <- list(
family = "Arial, sans-serif",
size = 18,
color = "grey"
)
f2 <- list(
family = "Old Standard TT, serif",
size = 14,
color = "#4477AA"
)
# bottom x-axis
ax <- list(
title = "Number of PBIs",
titlefont = f1,
anchor = "y",
side = "bottom",
showticklabels = TRUE,
tickangle = 0,
tickfont = f2
)
# top x-axis
ax2 <- list(
title = " ",
overlaying = "x",
anchor = "y",
side = "top",
titlefont = f1,
showticklabels = TRUE,
tickangle = 0,
tickfont = f2
)
# common y-axis
ay <- list(
title = "Process & Sub-Process Areas",
titlefont = f1,
showticklabels = TRUE,
tickangle = 0,
tickfont = f2
)
plot_ly(data = scrum %>%
group_by(Master.Project) %>%
summarise(Total_PBIs_Planned=sum(PBIs.Planned.in.Sprint, na.rm = TRUE),
Total_PBIs_Delivered = sum(Actual.PBI.Delivery,na.rm = TRUE)) %>% inner_join(scrum %>% count(Master.Project)), # creating the desired data frame
color = I("#149EF7")) %>%
# for bottom x-axis
add_segments(x = ~Total_PBIs_Planned, xend = ~Total_PBIs_Delivered,
y = ~Master.Project, yend = ~Master.Project, showlegend = FALSE) %>%
add_trace(x = ~Total_PBIs_Planned, y = ~Master.Project,
name = "Total_PBIs_Planned", type = 'scatter',mode = "markers",
marker = list(color = "#149EF7", size = 15,
line = list(color = '#FFFFFF', width = 1))) %>%
add_trace(x = ~Total_PBIs_Delivered, y = ~Master.Project,
name = "Total_PBIs_Delivered",type = 'scatter',mode = "markers",
marker = list(symbol ="circle-dot",color = "#F71430", size = 10,
line = list(color = '#FFFFFF', width = 1))) %>%
# for top x-axis
add_trace(x = ~n, y = ~Master.Project, xaxis = "x2",
name = "No._of_Sub_projects",type = 'bar',
marker = list(color = "#149EF7"),
opacity = 0.1,
hoverinfo = 'text',
text = ~paste(
Master.Project,
'<br> Total Sub Projects: ',n,
'<br> PBIs Planned: ',Total_PBIs_Planned,
'<br> PBIs Delivered: ',Total_PBIs_Delivered
)
) %>%
plotly::layout(
title = "Product Backlog Items - Planned Vs Delivered", titlefont = f1,
xaxis = ax,
yaxis = ay,
xaxis2 = ax2,
margin = list(l = 250)
)

Answer 1

You want to use rangemode = "tozero" in your axis layout.
ax <- list(
title = "Number of PBIs",
titlefont = f1,
anchor = "y",
side = "bottom",
showticklabels = TRUE,
tickangle = 0,
tickfont = f2,
rangemode = 'tozero')
Or you can specify your specific ranges using
range = c(0, 5)
See Plotly help here: https://plot.ly/r/axes/#rangemode