R如何拟合使用rworldmap创建的地图以绘制大小

Question

我有以下地图，显示了样本所覆盖的国家：

import pygame, sys, random, time

check_errors=pygame.init()

if check_errors[1]!=0:
    print("(!) Had {0} initializing errors, exiting...".format(check_errors[1]))
    sys.exit(-1) #ON this line  says:IndentationError: unindent does not match any outer indentation level
else:
    print("(+) PyGame successfully initialized!")

在生成的pdf中，图形如下所示：

我的问题：如何增加图形中生成的地图的大小？

我知道在require(rworldmap) require(tidyverse) countries <- c("AUS", "AUT", "BEL", "BGR", "BRA", "CAN", "CHE", "CHN", "CYP", "CZE", "DEU", "DNK", "ESP", "EST", "FIN", "FRA", "GBR", "GRC", "HRV", "HUN", "IDN", "IND", "IRL", "ITA", "JPN", "KOR", "LTU", "LUX", "LVA", "MEX", "MLT", "NLD", "NOR", "POL", "PRT", "ROU", "RUS", "SVK", "SVN", "SWE", "TUR", "TWN", "USA") countries <- as.tibble(countries) %>% mutate(covered = TRUE) %>% rename(countries = value) map <- joinCountryData2Map(countries, nameJoinColumn = "countries") %>% subset(continent != "Antarctica") mapCountryData( map, nameColumnToPlot='covered', catMethod='fixedWidth', numCats=2 , addLegend = FALSE, colourPalette = c("black", "grey"), borderCol = "white", oceanCol = 'grey', mapTitle = "sample coverage") 文档中，我可以设置.Rmd的块，但这会同时增加地图的大小和结果文档中标题的大小。相反，我想保持标题的大小固定，仅相对于标题增加地图的大小。

感谢您的帮助！