小编Got*_*tey的帖子

我使用Ubuntu 14.04,我有R版本3.1.2.当我尝试安装Rmpfr包时,我收到此错误

configure: error: Header file mpfr.h not found; maybe use --with-mpfr-include=INCLUDE_PATH

我是Linux新手,所以我不确切知道如何解决这个问题.

到目前为止,我有这个错误;

Configuration error:
  could not find the MySQL installation include and/or library
  directories.  Manually specify the location of the MySQL
  libraries and the header files and re-run R CMD INSTALL.

INSTRUCTIONS:

1. Define and export the 2 shell variables PKG_CPPFLAGS and
   PKG_LIBS to include the directory for header files (*.h)
   and libraries, for example (using Bourne shell syntax):

      export PKG_CPPFLAGS="-I<MySQL-include-dir>"
      export PKG_LIBS="-L<MySQL-lib-dir> -lmysqlclient"

   Re-run the R INSTALL command:


      R CMD INSTALL RMySQL_<version>.tar.gz

2. Alternatively, you may pass the configure arguments …

我有以下数据:

import PyPDF2
pdf_file = open("123.pdf", 'rb')
read_pdf = PyPDF2.PdfFileReader(pdf_file)
number_of_pages = read_pdf.getNumPages()
page = read_pdf.getPage(0)
page_content = page.extractText()
page_content

我希望从以下内容中提取数据的pdf:

page_content
Out[157]: "RiderNatio\nn Motorcycle\nTotal Time\nPosKm/hGap\nTeam \nGRAND PRIX OF QATAR\nResults and timing service provided by\n5380 m.osail International Circ\nuMotoGPŽ\nRaceClassification after 20 laps = 107.6 km\n2925YAMAHA\nMaverick VIÑALES\nSPA138'59.999\n165.5\n25Movistar Yamaha MotoGP\n4DUCATI\nAndrea DOVIZIOSO\nITA239'00.460\n165.50.461\n20Ducati Team\n46YAMAHA\nValentino ROSSI\nITA339'01.927\n165.41.928\n16Movistar Yamaha MotoGP\n93HONDAMarc MARQUEZ\nSPA439'06.744\n165.06.745\n13Repsol Honda Team\n26HONDADani PEDROS\nASPA539'07.127\n165.07.128\n11Repsol Honda Team\n41APRILIA\nAleix ESPARGARO\nSPA639'07.660\n164.97.661\n10Aprilia Racing Team Gresini\n45DUCATI\nScott REDDING\nGBR\n739'09.781\n164.89.782\n9OCTO Pramac Racing\n43HONDAJack MILLERAUS\n839'14.485\n164.514.486\n8EG 0,0 Marc VDS\n42SUZUKI\nAlex RINS\nSPA939'14.787\n164.414.788\n7Team SUZUKI ECSTAR\n94YAMAHA\nJonas FOLGER\nGER\n1039'15.068\n164.415.069\n6Monster Yamaha Tech 3\n99DUCATI\nJorge LORENZO\nSPA1139'20.515\n164.020.516\n5Ducati Team\n76DUCATI\nLoris BAZ\nFRA\n1239'21.254\n164.021.255\n4Reale Avintia …

尝试在R中安装MXNet软件包时我遇到了很多麻烦我使用的是3.4.0版本的R,我在Windows 10 CPU intel i3,64位x64处理器上.

我得到提示:

install.packages("mxnet")
Warning in install.packages :
  cannot open URL 'http://www.stats.ox.ac.uk/pub/RWin/src/contrib/PACKAGES.rds': HTTP status was '404 Not Found'
Installing package into ‘C:/Users/los40/OneDrive/Documentos/R/win-library/3.4’
(as ‘lib’ is unspecified)
Warning in install.packages :
  package ‘mxnet’ is not available (for R version 3.4.0)
Warning in install.packages :
  cannot open URL 'http://www.stats.ox.ac.uk/pub/RWin/bin/windows/contrib/3.4/PACKAGES.rds': HTTP status was '404 Not Found'

我试过下载这里提供的.rar文件.我解压缩一个并获取文件夹,其中"R package"试图通过使用以下命令安装它:

> install.packages('R.package.rar', lib='D:/mxnet',repos = NULL)
Error in install.packages : type == "both" cannot be used with 'repos = NULL'
> …

使用 Rails 5.2.4，我尝试在后台（在作业内）生成 pdf，然后将其附加到模型，如下所示：

pdf_contents = ApplicationController.render(
pdf: "name",
template: 'mytemplate.html.erb',
layout: 'pdf_layout.html',
disposition: 'attachment'
)

@user.attach(io: StringIO.new(pdf_contents), filename: "file.pdf", content_type: "application/pdf")

但我得到：

WARN: ActionView::Template::Error: private method `format' called for nil:NilClass

使用

gem 'wicked_pdf'
gem 'wkhtmltopdf-binary'

我正进入（状态：

error An unexpected error occurred: "Invalid value type 2:0 in /Users/myname/Desktop/work2/reservations_fully_paid/Foggle/yarn.lock".
info If you think this is a bug, please open a bug report with the information provided in "/Users/myname/Desktop/work2/reservations_fully_paid/Foggle/yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

yarn当尝试在我的react-rails项目中执行时

尝试编译时，所有图像都出现以下错误：

rails assets:precompile

ModuleNotFoundError: Module not found: Error: Can't resolve 'core-js/modules/es.symbol' in '/***/app/javascript/packs'




            Field 'browser' doesn't contain a valid alias configuration
              /*/app/javascript/core-js/modules/es.symbol.scss doesn't exist
            .css
              Field 'browser' doesn't contain a valid alias configuration
              /*/app/javascript/core-js/modules/es.symbol.css doesn't exist
            .module.sass
              Field 'browser' doesn't contain a valid alias configuration
              /*/app/javascript/core-js/modules/es.symbol.module.sass doesn't exist
            .module.scss
              Field 'browser' doesn't contain a valid alias configuration
              /*/app/javascript/core-js/modules/es.symbol.module.scss doesn't exist
            .module.css
              Field 'browser' doesn't contain a valid alias configuration
              /*/app/javascript/core-js/modules/es.symbol.module.css doesn't exist
            .png
              Field 'browser' doesn't contain a valid alias …

我在 R 中有一个表，我这样排序：

> x<-c("100","100","300","200","200","200")
> x
[1] "100" "100" "300" "200" "200" "200"
> table(x)
x
100 200 300 
  2   3   1 
> sort(table(x))
x
300 100 200 
  1   2   3 

但我的问题是我想按数字 300、100 和 200 对其进行排序。所以我想知道如何做。

我创建了一个新的 Rails 应用程序文件夹，运行顺利。一旦进入这样的文件夹，运行任何类型的rails命令rails s都会提示我：

You've tried to invoke Spring when it's already loaded (i.e. the Spring constant is defined).

This is probably because you generated binstubs with Spring 1.0, and you now have a Spring version > 1.0 on your system. To solve this, upgrade your bundle to the latest Spring version and then run `bundle exec spring binstub --all` to regenerate your binstubs. This is a one-time step necessary to upgrade from 1.0 to 1.1.

我目前有

spring …