markdown 比较Python和R. #python #r中的常见util函数

Posted 2021-05-06

## Concatenate strings

```py
## py ##
a = 'Data Science'
b = '!'

'{}{}'.format(a, b)
#[1] 'Data Science!'
```

```r
## r ##
a <- "Data Science"
b <- "!"

paste0(a, b)
#[1] "Data Science!"
```

## Subset a string

```py
## py ##
abc = 'abcdefg'
abc[:3]
#[1] 'abc'
```

```r
## r ##
abc <- "abcdefg"
substr(abc, 1, 3)
#[1] "abc"
```