How to Change the Na Color from Gray to White in a Ggplot Choropleth Map

How do I change the NA color from gray to white in a ggplot choropleth map?

You can change color of NA values (states without data) by changing argument na.value in scale_fill_continuos().

+scale_fill_continuous(low="thistle2", high="darkred", 
                       guide="colorbar",na.value="white")

Change range of fill values in choropleth map R

I just created a new column in the population dataframe that summarizes the population based on the ranges that I want to use, and then use that as the criteria for the fill:

txczpop$poprange[txczpop$pop2014 >= 0 & txczpop < 1000] <- "0-1,000"
txczpop$poprange[txczpop$pop2014 >= 1000 & txczpop < 10000] <- "1-10,000"
txczpop$poprange[txczpop$pop2014 >= 10000 & txczpop$pop2014  < 100000] <- "10,000-100,000"
txczpop$poprange[txczpop$pop2014 >= 100000 & txczpop$pop2014  < 1000000] <- "100,000 - 1,000,000"
txczpop$poprange[txczpop$pop2014 >= 1000000 & txczpop$pop2014  <= 5000000] <- "1,000,000 - 5,000,000"

Shading every other vertical month, alternating white and gray

I would use geom_rect with a separate data.frame (here: shades)

shades <- data.frame(xmin=seq(1.5,length(unique(dataset$Date))-1.5, 2),
                     xmax=seq(2.5,length(unique(dataset$Date))+.5, 2),
                     ymin=0, ymax=Inf)

ggplot(dataset,aes(x=Date,y=values,fill=type))+
    geom_boxplot(position=position_dodge(width = 0.7))+
    stat_boxplot(geom="errorbar",width=0.7)+
    coord_cartesian(ylim = c(min.box,max.box))+
    #geom_polygon(data=poly.data,mapping = aes(x=x,y=y),fill="grey30")+
    #scale_y_continuous(sec.axis = sec_axis(~(.-min.box)*max.count/box.25, name = "Sec axis"),breaks = scales::pretty_breaks(n = 10))+
    labs(title="Boxplot of values Over Time",y="values",x="Date (year-month)")+
    theme_classic(base_size=15)+
    theme(axis.text.x = element_text(angle = ifelse(noB>15,45,0), hjust=ifelse(noB>15,1,0.5)),panel.grid.major=element_line("light grey")) +
    geom_rect(inherit.aes = F, data = shades, mapping = aes(xmin=xmin, xmax=xmax, ymin = ymin, ymax = ymax), alpha = 0.2)

How do I conditionally color in a US States map using ggplot?

I think this is what you want to achieve? In geom_sf color refers to the color of the border and fill to the color filing the polygons (for polygons).

library(ggplot2)
library(tidyverse)
library(mapdata)
#> Loading required package: maps
#> 
#> Attaching package: 'maps'
#> The following object is masked from 'package:purrr':
#> 
#>     map
library(dplyr)

MainStates <- map_data("state")
State_Name <- c("alabama","arkansas","arizona","california","colorado")
Sales <- c(100,200,250,275,310)
df2 <- data.frame(State_Name,Sales)
MergedStates <- inner_join(MainStates, df2, by = c("region" = "State_Name"))

p <- ggplot() + geom_polygon(data = MergedStates,
                             aes(x=long, y=lat, group=group),
                             fill = ifelse(MergedStates$Sales <= 
                                              mean(MergedStates$Sales),"red","green"), size = 0.2)
p

^{Created on 2021-10-01 by the reprex package (v2.0.1)}

Change theme ggChoropleth

With interactive=TRUE the output of ggChoropleth is a ggiraph htmlwidget object and not a ggplot object. Hence, you cannot use + theme_bw().

I suggest to use the following solution:

p <- ggChoropleth(crimes, aes(fill=Murder, map_id=state), 
             map=states_map, interactive=F) 
p <- p + theme_void()
tooltip_css <- "background-color:white;font-style:italic;padding:10px;border-radius:20px 20px 20px 20px;"
ggiraph(ggobj = p, tooltip_extra_css = tooltip_css, zoom_max = 10)

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