[英]Manipulating “missing” label in legend: tmap
I want to manipulate the "Missing" label in my legend.我想在我的传说中操纵“丢失”的 label。
I'm using the tmap function in R.我在 R 中使用 tmap function。 I want to change it to read "Missing or not eligible to gentrify"
我想将其更改为“缺少或没有资格进行绅士化”
I have tried using the tm_text function and considered how I would change the label in the underlying data, but haven't found a solution.我尝试使用 tm_text function 并考虑如何更改基础数据中的 label,但没有找到解决方案。 Also, note the code uses a mapping function.
另外,请注意代码使用映射 function。
########################
# categorical mapping function
########################
cat.maps.wide.function <- function(data, varname, ltitle, colorplaette){
tm_shape(data, unit = "mi") +
tm_polygons(col = varname , # add variable(s)
style = "cat", # set break pattern to object LQ.cuts
palette = colorplaette, # set color fill to blue refreshing
border.col = "grey40", # color the borders white
border.alpha = 0.5, # set border transparency
title = ltitle, # title for legend
colorNA = "white") + # color of missing data
tm_style("bw") +
tm_layout(panel.label.bg.color ="NA",
frame = FALSE,
bg.color = "transparent") + # panel label color
tm_legend(legend.title.fontface = 2, # legend bold
legend.title.size = 0.75,
legend.text.size = 0.65,
legend.bg.alpha = 0,
legend.width = 5) +
tm_scale_bar(color.dark = "gray60", # Customize scale bar and north arrow
position = c(0.6, 0.05)) + # set position of the scale bar
tm_compass(type = "4star",
size = 2.5, # set size of the compass
fontsize = 0.5, # set font size of the compass
color.dark = "gray60", # color the compass
text.color = "gray60", # color the text of the compass
position = c(0.5, 0.05)) + # set position of the compass
# add border names
tm_shape(boro.boundaries) +
tm_borders(alpha = .5) +
tm_text("boro",
size = 0.75,
remove.overlap = TRUE,
auto.placement=FALSE,
xmod= "x", ymod= "y")
}
########################
# change in residential housing price
########################
# object for 2016 variable
mt1pva5.2016 <- cat.maps.wide.function(
data = data.map.tract.wide,
varname = "chgpcmt1pva5_overlap2016",
colorplaette = mt1pva5.overlap.colors,
ltitle = "Change in residential housing price for eligible tracts ")
mt1pva5.2016
the tm_layout() functin has the labels argument which lets you maniputale the label of the legend passing a character vector. tm_layout()函数具有标签参数,可让您通过字符向量操作图例的 label。 In yout tm_layout add something like:
在 yout tm_layout 添加如下内容:
tm_layout(labels = c("Decrease in residential housing price",
"Increase in residential housing price",
"Missing or not eligible to gentrify")
Thanks for sharing the data.感谢您分享数据。 Apparently, you can use
labels
in tm_polygons
but not to change the NA
values.显然,您可以在
tm_polygons
中使用labels
,但不能更改NA
值。 For that, you also will need textNA
:为此,您还需要
textNA
:
tm_polygons(col = varname , # add variable(s)
style = "cat", # set break pattern to object LQ.cuts
palette = colorplaette, # set color fill to blue refreshing
border.col = "grey40", # color the borders white
border.alpha = 0.5, # set border transparency
title = ltitle, # title for legend
colorNA = "white", # color of missing data
textNA = "Missing or not eligible to gentrify",
labels = c("Decrease in residential housing price",
"Increase in residential housing price")) +
...
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