想用R语言中maptools工具包将中国31省市分類着色各个省市数值不同，已经分成了三类第一类用红色，第二类用绿色第三类用其他颜色，采用条件语句但是总是出现错误，現将程序粘贴与此请各位帮忙，谢谢！

provname=c("北京市","天津市","河北省","山西省","内蒙古自治区","辽宁省","吉林省","黑龙江省","上海市","江苏省","浙江省","安徽省","福建渻","江西省","山东省","河南省","湖北省","湖南省","广东省","广西壮族自治区","海南省","重庆市","四川省","贵州省","云南省","西藏自治区","陕西省","甘肃省","青海省","宁夏回族自治区","新疆维吾尔自治区");

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