【875】numpy复制并扩充维度
摘要：参考：numpy复制并扩充维度 参考：记录 之 numpy扩充某一维度，并重复填充 np.expand_dims()：扩充数组的维度，并且制定扩充的维度位置，用axis来指定 repeat()：用来复制数组内容在指定的维度上面 transpose()：用来转置数组 1.numpy.expand_di
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posted @ 2023-09-05 08:14
随笔分类 - Python Study
Study of Python.
【873】Python读取NetCDF中的scale_factor和add_offset
摘要：参考：python中scale的用法_在netCDF4和Python中使用scale_factor和add_offset的示例？ 参考代码： import netCDF4 as nc dir_path = "./2m_temperature/03_TIFF/" files = os.listdir(
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posted @ 2023-08-26 10:24
【871】netCDF数据处理
摘要：参考：How to convert NetCDF to GeoTIFF? 参考：利用Python(netCDF4库)读取.nc文件（NetCDF气象数据文件）的基本操作 参考：经度转换0°-360°与-180°-180°之间的相互转换 参考：https://blog.csdn.net/weixin_
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posted @ 2023-08-17 15:26
【864】pandas dataframe根据规则批量赋值
摘要：ref: Pandas新增一列并按条件赋值？ 把下图中的 NaN 都赋值为 0 df.loc[条件判断, 'value'] = 0 m = pd.merge(gdf_africa, df_af_mp, how='left', on='country') m.loc[m['value'].isna()
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posted @ 2023-07-20 14:10
【863】Calculate records based on the same value
摘要：Suppose we have a dataframe, it has a column of "country". It lists different names of country's names, and for one country maybe it has multiple reco
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posted @ 2023-07-20 13:33
【855】country converter, ISO alpha 3
摘要：Ref: country-converter 1.0.0 Ref: Python-pycountry | Understand How to Use pycountry These two python libraries are both used to process information a
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posted @ 2023-07-09 11:12
【853】numpy里面替换值
摘要：参考：How to Replace Elements in NumPy Array (3 Examples) You can use the following methods to replace elements in a NumPy array: Method 1: Replace Eleme
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posted @ 2023-07-06 07:48
【850】numpy处理日期数据
摘要：参考：Add Months to datetime Object in Python ☀☀☀<< 举例 >>☀☀☀ # import packages import pandas as pd # adding months to a particular date present = '2022-0
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posted @ 2023-07-03 10:42
【847】create geoDataFrame from dataframe
摘要：Ref: From WKT format Firstly, we already have a dataframe, and there is a column of geometry. But this column is in the format of the string, therefor
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posted @ 2023-06-30 08:54
【846】自定义cmap，用于GeoPandas、matplotlib制图
摘要：参考：自定义颜色条教程 import matplotlib as mpl cmap = mpl.colors.ListedColormap(['yellow', '#E0E0E0']) africa_gdf.plot(column='hotspot_category', cmap=cmap, leg
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posted @ 2023-06-30 08:38
【843】dataframe相关操作 (match merge)
摘要：Reference: Python for Data Analysis, 3E - Pandas pandas.DataFrame.merge 29-April-2024 use to_string() to print the entire DataFrame. Check the number
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posted @ 2023-06-15 18:31
【842】GeoPandas设置坐标系
摘要：参考：geopandas--坐标系学习 gdf.crs = 'EPSG:4326'
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posted @ 2023-06-15 10:44
【841】shapely合并多个Polygon/MultiPolygon
摘要：参考：Converting list of polygons to multipolygon using shapely? MultiPolygon -> Polygon list list(multiPoly.geoms) Polygon list -> MultiPolygon shapely.
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posted @ 2023-06-13 18:54
【830】计算bearing值
摘要：参考：Formula to Find Bearing or Heading angle between two points: Latitude Longitude 计算三角函数的时候，需要将经纬度的度数转换为弧度制，最后再将计算出来的弧度制转换为角度 def bearing_lonlat(phi_
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posted @ 2023-04-12 10:21
【823】Python subprocess.call() 运行 R 代码
摘要：参考：How to Use R and Python Together? Try These 2 Packages 实现功能：在 Python 代码中运行 R 文件，得到结果再在 Python 里面操作！ import subprocess res = subprocess.call("Rscrip
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posted @ 2023-03-15 18:28
【822】GeoPandas 绘图，专题图绘制
摘要：参考：Mapping and Plotting Tools 参考：geopandas.GeoDataFrame.plot 参考：Choosing Colormaps 参考：geopandas，用python分析地理空间数据原来这么简单！ 参考：「GIS教程」Python-GeoPandas地图、专题
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posted @ 2023-03-15 15:12
【820】Python R 读取 csv 文件加入数据类型控制
摘要：参考：PySe-023-pandas.read_csv 读取 csv 文件，指定列数据类型 解决字符串数据列变为数字的问题 参考：Read a delimited file (including CSV and TSV) into a tibble Python：根据具体的列名指定数据格式 impo
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posted @ 2023-03-13 17:53
【818】Python dataframe 重命名列名
摘要：参考：pandas: Rename column/index names (labels) of DataFrame rename(columns={字典}) 例子： print(df.rename(columns={'A': 'Col_1', 'C': 'Col_3'})) # Col_1 B C
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posted @ 2023-03-13 14:05
【817】Python dataframe 多条件筛选
摘要：参考：Pandas条件筛选并赋值实用操作一例 选择不包含以下两个值的其他内容 df_130 = df2[(df2['.region_id'] != 25025000703) & (df2['.region_id'] != 25025000504)]
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posted @ 2023-03-13 13:57
【816】rpy2 在Python内部调用R语言
摘要：参考：rpy2 学习笔记 参考：在python中使用R｜rpy2
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posted @ 2023-03-13 13:43
