[英]How to save data file into .RData?
I want to save data into an .RData
file.我想将数据保存到
.RData
文件中。
For instance, I'd like to save into 1.RData
with two csv files and some information.例如,我想将两个 csv 文件和一些信息保存到
1.RData
。
Here, I have two csv files在这里,我有两个 csv 文件
1) file_1.csv contains object city[[1]]
2) file_2.csv contains object city[[2]]
and additionally save other values, country and population as follows.并另外保存其他值,国家和人口如下。 So, I guess I need to make objects 'city' from two csv files first of all.
所以,我想我首先需要从两个 csv 文件中创建对象“城市”。
The structure of 1.RData may looks like this: 1.RData 的结构可能如下所示:
> data = load("1.RData")
> data
[1] "city" "country" "population"
> city
[[1]]
NEW YORK 1.1
SAN FRANCISCO 3.1
[[2]]
TEXAS 1.3
SEATTLE 1.4
> class(city)
[1] "list"
> country
[1] "east" "west" "north"
> class(country)
[1] "character"
> population
[1] 10 11 13 14
> class(population)
[1] "integer"
file_1.csv
and file_2.csv
have bunch of rows and columns. file_1.csv
和file_2.csv
有一堆行和列。
How can I create this type of RData with csv files and values?如何使用 csv 文件和值创建这种类型的 RData?
Alternatively, when you want to save individual R objects, I recommend using saveRDS
.或者,当您想要保存单个 R 对象时,我建议使用
saveRDS
。
You can save R objects using saveRDS
, then load them into R with a new variable name using readRDS
.您可以使用
saveRDS
保存 R 对象,然后使用saveRDS
将它们加载到具有新变量名的readRDS
。
Example:例子:
# Save the city object
saveRDS(city, "city.rds")
# ...
# Load the city object as city
city <- readRDS("city.rds")
# Or with a different name
city2 <- readRDS("city.rds")
But when you want to save many/all your objects in your workspace, use Manetheran's answer.但是,当您想在工作区中保存许多/所有对象时,请使用 Manetheran 的答案。
There are three ways to save objects from your R session:有三种方法可以从 R 会话中保存对象:
The save.image()
function will save all objects currently in your R session: save.image()
函数将保存当前在 R 会话中的所有对象:
save.image(file="1.RData")
These objects can then be loaded back into a new R session using the load()
function:然后可以使用
load()
函数将这些对象加载回新的 R 会话:
load(file="1.RData")
If you want to save some, but not all objects, you can use the save()
function:如果你想保存一些但不是所有的对象,你可以使用
save()
函数:
save(city, country, file="1.RData")
Again, these can be reloaded into another R session using the load()
function:同样,这些可以使用
load()
函数重新加载到另一个 R 会话中:
load(file="1.RData")
If you want to save a single object you can use the saveRDS()
function:如果要保存单个对象,可以使用
saveRDS()
函数:
saveRDS(city, file="city.rds")
saveRDS(country, file="country.rds")
You can load these into your R session using the readRDS()
function, but you will need to assign the result into a the desired variable:您可以使用
readRDS()
函数将这些加载到 R 会话中,但您需要将结果分配给所需的变量:
city <- readRDS("city.rds")
country <- readRDS("country.rds")
But this also means you can give these objects new variable names if needed (ie if those variables already exist in your new R session but contain different objects):但这也意味着您可以根据需要为这些对象提供新的变量名称(即,如果这些变量已存在于您的新 R 会话中但包含不同的对象):
city_list <- readRDS("city.rds")
country_vector <- readRDS("country.rds")
Just to add an additional function should you need it.只是在您需要时添加附加功能。 You can include a variable in the named location, for example a date identifier
您可以在命名位置中包含一个变量,例如日期标识符
date <- yyyymmdd
save(city, file=paste0("c:\\myuser\\somelocation\\",date,"_RData.Data")
This was you can always keep a check of when it was run这是你可以随时检查它何时运行
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