我用Biocmanager::install()和Biocmanager::vesion()都报错,显示Bioconductor version cannot be validated; no internet connection? See #troubleshooting section in vignette,下面的warnings显示In file(con, "r") : URL 'https://bioconductor.org/config.yaml': status was 'SSL connect error',请问这是哪里出...
URL 'https://cran.rstudio.com/bin/macosx/big-sur-arm64/contrib/4.1/VIM_6.1.0.tgz': status was 'SSL connect error' Error in download.file(url, destfile, method, mode = "wb", ...) : cannot open URL 'https://cran.rstudio.com/bin/macosx/big-sur-arm64/contrib/4.1/VIM_6.1.0.tg...
Windows下面有直接的安装包,直接下载安装很方便,但是对于CentOS6.0上不能直接通过yum安装R,需要自己编译。 下载页面: http://www.landui.com/mirrors/CRAN/ 在编译R之前,需要通过yum安装以下几个程序: 代码如下: #yum install gcc-gfortran #否则报”configure: error: No F77 compiler found”错误 ...
进行方差分析: ## ## Error:No ## Df Sum Sq Mean SqFvaluePr(>F)## group2912.2456.15.7830.0174*## Residuals12946.578.9##---## Signif.codes:0'***'0.001'**'0.01'*'0.05'.'0.1' '1## ## Error:No:times ## Df Sum Sq Mean SqFvaluePr(>F)## times42336.5584.1106.6<2e-16***## ...
(x) # 删除变量x > x # 局部变量x已经被删除 Error: object 'x' not found > ls.str() m : num 7 n : num 8 v : num 12 y : num 1 z : num 1 > rm(m, n) # 同时删除多个变量 > ls.str() v : num 12 y : num 1 z : num 1 > rm(list = ls()) # 删除所有变量 > ...
ssl=TRUE), authenticate = TRUE, encoding = "utf-8", send = TRUE ) } if(a$a$Slave_IO_Running=='NO'){ email <- send.mail( from = sender, to = recipients, subject= subj, body =paste(" 错误代码 : ", a$Last_IO_Errno, '\n',' 详细错误信息:',a$Last_IO_Error, '\n'," ...
IBM JDK 7 SSL connection not working I have this code: The problem I encounter is this: with IBM JDK 6, everything works fine, with IBM JDB 7 it fails with error: What could be the problem ? I am using the same host:port combination, no ... ...
而且httr还提供了诸如session、cookie、SSL、header、proxy、timeoutd等更过高级管理功能。当然你可以用它来做简单的爬虫应用,如果需要更高级的爬虫,我们需要投入rvest的怀抱来支持诸如xpath等高级爬虫特性。 DBI DBI是一个为R与数据库通讯的数据库接口。相当于Java里面的DAO,Python里的Torndb和Tornlite,方便多种关系...
library(DBI) # 创建一个临时内存的 RSQLite 数据库 con <- dbConnect(RSQLite::SQLite(), dbname = ":memory:") dbListTables(con) # 直接插入整个数据框到数据库中 dbWriteTable(con, "mtcars", mtcars) dbListTables(con) dbListFields(con, "mtcars") dbReadTable(con, "mtcars") # 你可以获取...
o“ERROR username already taken\r\n” if the username already exists. o“OK\r\n” if the registration was successful. • “LOGIN\r\n”: a client sends this message to authenticate itself, the server responds with: o“OK\r\n” if the username exists and the password match the one ...