DataFrame.sample

danfo.DataFrame.sample(num, seed) [source]
Parameters
Type
Description
Default
num
Int
The number of rows to return. Defaults to -1, which shuffles and return all rows. 
-1
seed
int
An integer specifying the random seed that will be used to create the distribution. Ensures reproducibility of generated samples. 
1
Returns:
       return {Promies} resolves to DataFrame
​
Sample a DataFrame randomly
Node
Browser
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const dfd = require("danfojs-node")
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​
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async function load_data() {
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  let data = {
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    Name: ["Apples", "Mango", "Banana", "Pear"],
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    Count: [21, 5, 30, 10],
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    Price: [200, 300, 40, 250],
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  };
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​
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  let df = new dfd.DataFrame(data);
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  let s_df = await df.sample(2);
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  s_df.print();
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}
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​
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load_data()
Copied!
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​
Copied!
Output
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╔═══╤═══════════════════╤═══════════════════╤═══════════════════╗
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║   │ Name              │ Count             │ Price             ║
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╟───┼───────────────────┼───────────────────┼───────────────────╢
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║ 0 │ Apples            │ 21                │ 200               ║
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╟───┼───────────────────┼───────────────────┼───────────────────╢
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║ 2 │ Banana            │ 30                │ 40                ║
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╚═══╧═══════════════════╧═══════════════════╧═══════════════════╝
Copied!
Sample a DataFrame randomly with seed
By setting seed when using sample, you can ensure that the random sampling is reproducible. 
Node
Browser
1
const dfd = require("danfojs-node")
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​
3
async function load_data() {
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    let data = {
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        Name: ["Apples", "Mango", "Banana", "Pear"],
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        Count: [21, 5, 30, 10],
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        Price: [200, 300, 40, 250],
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    };
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​
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    let df = new dfd.DataFrame(data);
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    let s_df = await df.sample(3, { seed: 2 });
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    s_df.print();
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​
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}
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​
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load_data()
Copied!
1
​
Copied!
Output
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╔════════════╤═══════════════════╤═══════════════════╤═══════════════════╗
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║            │ Name              │ Count             │ Price             ║
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╟────────────┼───────────────────┼───────────────────┼───────────────────╢
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║ 1          │ Mango             │ 5                 │ 300               ║
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╟────────────┼───────────────────┼───────────────────┼───────────────────╢
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║ 2          │ Banana            │ 30                │ 40                ║
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╟────────────┼───────────────────┼───────────────────┼───────────────────╢
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║ 0          │ Apples            │ 21                │ 200               ║
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╚════════════╧═══════════════════╧═══════════════════╧═══════════════════╝
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​
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​
Copied!

DataFrame.tail

DataFrame.add

Last modified 17d ago

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Sample a DataFrame randomly

Sample a DataFrame randomly with seed