对于xarray数据集中的所有DataArrays有没有比
更好的求和方法ds.sum()这有效，但看起来有点笨重。是否有相当于对pandas DataFrame列进行求和？
注意// get locally stored recipe values
var local_recipes=localStorage.getItem("recipes");
// check if recipes is defined in local storage
if(typeof local_recipes !== 'undefined' && local_recipes !== null){
// if recipe is stored in local storage
var local_recipes=JSON.parse(localStorage.getItem("recipes"))
}else{
// if recipe is not stored in local storage
var default_recipes=[
{
name: "Pumpkin Pie",
ingredients: [
"Pumpkin Puree",
"Sweetened Condensed Milk",
"Eggs",
"Pumpkin Pie Spice",
"Pie Crust"
]
},
{
name: "Spaghetti",
ingredients: ["Noodles", "Tomato Sauce", "(Optional) Meatballs"]
},
{
name: "Onion Pie",
ingredients: ["Onion", "Pie Crust", "Sounds Yummy right?"]
}
]
localStorage.setItem("recipes",JSON.stringify(default_recipes) );
local_recipes=default_recipes
}
方法适用于每个DataArrays - 但我想组合DataArrays。
答案 0 :(得分：3)
我假设你想要对每个数据变量求和，例如sum(d.sum() for d in ds.data_vars.values())。在xarray的未来版本中（尚未在v0.10中），这将更简洁：您将能够编写sum(d.sum() for d in ds.values())。
另一种选择是将数据集转换为单个DataArray并立即对其求和，例如ds.to_array().sum()。如果您有不同尺寸的数据变量，效率会降低。