小编bwa*_*en2的帖子

我正在开发一款预装了大部分开罗要求的无头ubuntu机器,但我对让R使用Cairo感到磕磕绊绊.有没有人知道我需要设置/安装什么标志或其他软件包才能让install.packages使用其依赖项的现有安装正确构建Cairo？技巧:我不能使用sudo命令或apt-get,其他软件必须包含<50Mb的内存.这可能吗？看起来我需要的大部分东西都存在,如果我可以将它连接到R.

> library('Cairo')
Error in library("Cairo") : there is no package called ‘Cairo’
> install.packages('Cairo')
...
* installing *source* package ‘Cairo’ ...
...
checking for pkg-config... /usr/bin/pkg-config
configure: CAIRO_CFLAGS=/usr/lib:/usr/bin:/usr/include
checking if R was compiled with the RConn patch... no
checking cairo.h usability... no
checking cairo.h presence... no
checking for cairo.h... no
configure: error: Cannot find cairo.h! Please install cairo (http://www.cairographics.org/) and/or set CAIRO_CFLAGS/LIBS correspondingly.
ERROR: configuration failed for package ‘Cairo’
* removing ‘/app/vendor/R/lib64/R/library/Cairo’

这意味着我需要安装libcairo2-dev软件包,但是尽管pixman存在于我的系统中,但是通过configure/make这样做会遇到pixman错误:

package pixman-1 was not …

我正在通过Vulcan从Heroku上的源代码构建R,并尝试调试缺少png()支持.我认为该问题与基于以下输出的libXmu或等效物的发现有关.如何传递编译器一个文件夹来查找libXmu？(我可以蜷缩一下就好了).

checking X11/Intrinsic.h usability... yes
checking X11/Intrinsic.h presence... yes
checking for X11/Intrinsic.h... yes
checking for XtToolkitInitialize in -lXt... yes
using X11 ... yes
checking for KeySym... yes
checking X11/Xmu/Atoms.h usability... no
checking X11/Xmu/Atoms.h presence... no
checking for X11/Xmu/Atoms.h... no

功能显示缺少png和x11:

> capabilities()
    jpeg      png     tiff    tcltk      X11     aqua http/ftp  sockets 
   FALSE    FALSE    FALSE    FALSE    FALSE    FALSE     TRUE     TRUE 
  libxml     fifo   cledit    iconv      NLS  profmem    cairo 
    TRUE     TRUE     TRUE     TRUE     TRUE    FALSE    FALSE 

我的厨房水槽打电话:

./configure --prefix=$prefix --enable-R-shlib --with-x --with-libpng --with-jpeglib && …

我有一个包需要Cython来构建其扩展,我试图调整该setup.py文件以简化安装.

一个简单的

pip install git+git://<pkg-repo> 

抛出错误

$ pip install git+https://<pkg-repo>
Downloading/unpacking git+https://<pkg-repo>
  Cloning https://<pkg-repo> to /tmp/pip-nFKHOM-build
  Running setup.py (path:/tmp/pip-nFKHOM-build/setup.py) egg_info for package from git+https://<pkg-repo>
    Traceback (most recent call last):
      File "<string>", line 17, in <module>
      File "/tmp/pip-nFKHOM-build/setup.py", line 2, in <module>
        from Cython.Build import cythonize
    ImportError: No module named Cython.Build
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):

  File "<string>", line 17, in <module>

  File "/tmp/pip-nFKHOM-build/setup.py", line 2, in <module>

    from Cython.Build import cythonize …

我正在尝试在等值区域上设置自定义颜色断点，但比例似乎不符合我倾斜的颜色位置。例如：

counties = alt.topo_feature(vega_data.us_10m.url, 'counties')

states = alt.topo_feature(vega_data.us_10m.url, 'states')

outlines = alt.Chart(states).mark_geoshape(
    stroke='black'
).project('albersUsa')

domain = [df.min()['rep_vote_change'], 0, df.max()['rep_vote_change']]
range_ = ['darkred', 'orange', 'green']
colors = alt.Chart(counties).mark_geoshape().encode(
    color=alt.Color('rep_vote_change:Q', scale=alt.Scale(domain=domain, range=range_))
).transform_lookup(
    lookup='id',
    from_=alt.LookupData(df, 'id', ['rep_vote_change'])
).project(
    type='albersUsa'
).properties(
    width=500,
    height=300
)

colors + outlines 

产生：

请注意橙色不是以 0 为中心。如何强制刻度颜色与我的域断点相匹配？