小编Rav*_*avi的帖子

由于我公司的防火墙，我正在从本地手动安装软件包。从终端构建包时没有错误，但是当我使用库函数加载包时出现错误

 unable to load shared object 'C:/Program Files/R/R-3.6.1/library/Rcpp/libs/x64/Rcpp.dll':
  LoadLibrary failure:  The specified procedure could not be found.

它还抛出一个提示

任何帮助表示赞赏谢谢！

尝试：

1. inDL(x, as.logical(local), as.logical(now), ...) 中的错误：无法加载共享对象
2. https://github.com/r-lib/rlang/issues/306

以上似乎都不起作用

#include<stdio.h>
int main()
{
    int arr[] = {10, 20, 30, 40, 50, 60};
    int *ptr1 = arr;
    int *ptr2 = arr + 5;
    printf("Number of elements between two pointer are: %d.", 
                                (ptr2 - ptr1));
    printf("Number of bytes between two pointers are: %d",  
                              (char*)ptr2 - (char*) ptr1);
    return 0;
}

对于第一个printf()语句,输出将5根据Pointer减法混淆

第二个printf()声明怎么样,输出会是什么？

我想用 R 创建印度的分区统计图

我做的第一步是在 R 中导入形状文件

来自https://github.com/datameet/maps/tree/master/States

并在 R 中读取它

shape <- rgdal::readOGR(dsn="/Data/Admin2.shp")
states <- fortify(shape, region = "ST_NM")

接下来我有一个州及其人口的数据集states_data

structure(list(Name = c("JAMMU & KASHMIR", "HIMACHAL PRADESH", 
"UTTARAKHAND", "RAJASTHAN", "UTTAR PRADESH", "BIHAR", "SIKKIM", 
"ARUNACHAL PRADESH", "NAGALAND", "MANIPUR", "MIZORAM", "TRIPURA", 
"MEGHALAYA", "ASSAM", "WEST BENGAL", "JHARKHAND", "ODISHA", "CHHATTISGARH", 
"MADHYA PRADESH", "GUJARAT", "DAMAN & DIU", "DADRA & NAGAR HAVELI", 
"MAHARASHTRA", "ANDHRA PRADESH", "KARNATAKA", "GOA", "LAKSHADWEEP", 
"KERALA", "TAMIL NADU", "ANDAMAN & NICOBAR ISLANDS"), TOT_P = c(1493299, 
392126, 291903, 9238534, 1134273, 1336573, 206360, …