小编Alv*_*les的帖子

安装geopandas时引发此错误。我一直在网上寻找它的解决方案，但是他们都没有真正解释发生的事情以及如何解决它。这是完整的错误：

    Collecting geopandas
  Using cached https://files.pythonhosted.org/packages/24/11/d77c157c16909bd77557d00798b05a5b6615ed60acb5900fbe6a65d35e93/geopandas-0.4.0-py2.py3-none-any.whl
Requirement already satisfied: shapely in c:\users\alvaro\anaconda3\envs\tfdeeplearning\lib\site-packages (from geopandas) (1.6.4.post2)
Requirement already satisfied: pandas in c:\users\alvaro\anaconda3\envs\tfdeeplearning\lib\site-packages (from geopandas) (0.20.3)
Collecting fiona (from geopandas)
  Using cached https://files.pythonhosted.org/packages/3a/16/84960540e9fce61d767fd2f0f1d95f4c63e99ab5d8fddc308e8b51b059b8/Fiona-1.8.4.tar.gz
    Complete output from command python setup.py egg_info:
    A GDAL API version must be specified. Provide a path to gdal-config using a GDAL_CONFIG environment variable or use a GDAL_VERSION environment variable.

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in C:\Users\Alvaro\AppData\Local\Temp\pip-install-oxgkjg8l\fiona\

我正在尝试绘制一个包含两个图例的图，一个位于图的底部，另一个位于图的右侧。

library(tidyverse)

df <- tibble(names = mtcars %>% 
  rownames(),
  mtcars)

#plot 1
p1 <- df %>% 
  filter(names == "Duster 360" | names == "Valiant") %>% 
ggplot(aes(x = as.factor(cyl), y = mpg, color = names)) +
  geom_point() +
  geom_hline(aes(yintercept = 20, linetype = "a")) +
  theme(legend.position = "bottom")

p1

所需的情节（图例应位于情节之外）：