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Danfo.js

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Release Notes

[LATEST] Release Node (v1.0.2), Browser (v1.0.2)
Date: 19th Jan 2022
What's Changed
Update TensorFlow version to fix M1 chip incompatibility by @risenW in https://github.com/javascriptdata/danfojs/pull/358
Add new feature iat and at by @risenW in https://github.com/javascriptdata/danfojs/pull/359
Fixed issue with sort by values by @risenW in https://github.com/javascriptdata/danfojs/pull/360
Full Changelog: https://github.com/javascriptdata/danfojs/compare/v1.0.1...v1.0.2
Release Node (v1.0.1), Browser (v1.0.1)
Date: 16th Jan 2022
Minor bug fixes
​https://github.com/javascriptdata/danfojs/issues/354​
​https://github.com/javascriptdata/danfojs/issues/344​
​https://github.com/javascriptdata/danfojs/pull/347​
Contributors: @Devwulf, @risenW​
Release Node (v1.0.0), Browser (v1.0.0)
Date: 12th Jan 2022
Major breaking update. See the migration guide for pre-v1 users.
New Features
Full Typescript support
streamCsvTransforme ==> Pipable stream transformer for incrementally transforming DataFrames
streamJSON ==> Supports streaming of local or remote JSON files into DataFrame.
streamCSV ==> Supports streaming of local or remote CSV files into DataFrame.
openCsvInputStream ==> Open a local/remote CSV file as a readable stream
writeCsvOutputStream ==> Open a local/remote CSV file as a writable stream
​https://github.com/javascriptdata/danfojs/issues/325​
​https://github.com/javascriptdata/danfojs/issues/296​
Bug Fixes
​https://github.com/javascriptdata/danfojs/issues/335​
​https://github.com/javascriptdata/danfojs/issues/338​
Contributors @risenW @steveoni​
Release Node (v0.3.3), Browser (0.3.3)
Date: 10th Oct 2021
Minor patch update
Release - Node (v0.3.2), Browser (0.3.2)
Date: 2nd Oct 2021
Minor patch update for column name display after aggregation functions like sum, mean, var, are applied to a column axis.
Release - Node (v0.3.1), Browser (0.3.1)
Date: 1st Oct 2021
New Features
Ability to create empty frames
Flag for toggling between low/high memory mode
Inplace support for all mutating operations
Ability to set Configuration values on frame creation
Support boolean mask for subsetting with iloc and loc. E.g df.iloc({rows: df["count"].gt(5), columns: [0, 1]})
Update an existing column value via subsetting. E.g df["count"] = [1,3,4,5]
Add loc indexing support for Series
Add configuration support for formating DataFrame display in the console
New DataFrame applyMap function for element-wise apply function
and and or logical comparison support. E.g
df.loc({
rows: df['Salary_in_1000'].gte(100)).and(df['Age'].gt(60))
})
read_csv now uses Papaparse and supports config values for headers, separator, etc.
to_csv , to_json and to_excel functions now support saving to local disk in Node and downloadable in the browser. Also, supports config parameters for output.
read_json now supports config values for headers, authentication, separator, etc.
read_excel now uses XLSX parser, hence supports all XLSX config options.
DataFrame query function now accepts boolean masks with single or multiple conditions. E.g
df.query({
rows: df['Salary_in_1000'].gte(100)).and(df['Age'].gt(60))
})
Bug Fixes
Column data not being updated when mutating internal data array
Str class error for non-string type
Better error message
Fix support for all JS Date format
Fix loc slicing bug for row index with string labels
DataFrame apply function now works only across a specified axis
Contributors @risenW​
[LATEST] ReleaseNode (v0.2.7), Browser (0.2.6)
Date: 30th May 2021
[Bug Fixes]: #206 #203 #200 #198 #198 #188 #181 #175 #183 #168
[Patches] #191 #161 #206​
Contributors @risenW @steveoni @jpjagt @sponsfreixes @bherbruck @woosuk288 and @adithyaakrishna​
ReleaseNode (v0.2.6), Browser (0.2.5)
Date: 29th March 2021
[Bug Fixes]: #150 #152​
[Patches] #159 , #158​
[Feature] #154 Perform groupby operation on grouped columns directly:
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group = df.groupby(['A"])
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group.min()
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​
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​
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groupby.apply((x) => x.add(2))
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groupby.col(["C"]).apply((x) => x.min())
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Contributors: @steveoni @PrawiraGenestonlia @woosuk288 @risenW
Release Node (v0.2.5), Browser (0.2.4)
Date: 6th March 2021
We added/updated the following features:
Fix error thrown when danfojs CDN is placed in an HTML header
Smaller bundle size for browser: From ~1.7mb to about ~550kb
Stopped bundling Danfojs with Plotly. This means that as of v0.2.3, we no longer ship with Plotly distribution due to the huge size. Plotly plots are still supported, but in order to make them, you have to explicitly add the Plotly CDN or package.
A simple example:
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<!DOCTYPE html>
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<html lang="en">
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<head>
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    <meta charset="UTF-8">
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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
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    <script src="https://cdn.plot.ly/plotly-1.2.0.min.js"></script> 
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    <script src="https://cdn.jsdelivr.net/npm/[email protected]/lib/bundle.min.js"></script> 
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​
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    <title>Document</title>
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</head>
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​
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<body>
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​
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    <div id="div1"></div>
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    <div id="div2"></div>
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    <div id="div3"></div>
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​
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    <script>
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​
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        dfd.read_csv("https://raw.githubusercontent.com/plotly/datasets/master/finance-charts-apple.csv")
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            .then(df => {
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​
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                df['AAPL.Open'].plot("div1").box() //makes a box plot
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​
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                df.plot("div2").table() //display csv as table
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​
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                new_df = df.set_index({ key: "Date" }) //resets the index to Date column
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                new_df.plot("div3").line({ columns: ["AAPL.Open", "AAPL.High"] })  //makes a timeseries plot
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​
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            }).catch(err => {
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                console.log(err);
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            })
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​
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    </script>
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</body>
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​
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</html>
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Release (v0.2.2)​
Date: 14th February 2021
We added/updated the following features:
Fix babel runtime issue in node version
Smaller size in browser version in this version. From ~8mb to about ~5mb
Fix browser tag issue and returns back to specific versioning instead of @latest
Danfojs now ships with an exported version of tensorflowjs-node (2.8.5). This fixes the double dependency issue when building ML models, as you no longer need to install/import tensorflowjs separately.
To use tensoflowjs-node, you can reference it from danfo as shown below:
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const dfd = require("danfojs-node")
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const tf = dfd.tf //contains a reference to the tensorflowjs-node library
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​
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const model = tf.sequential();
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model.add(tf.layers.dense({ inputShape: [7], units: 124, activation: 'relu', kernelInitializer: 'leCunNormal' }));
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model.add(tf.layers.dense({ units: 64, activation: 'relu' }));
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model.summary();
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Release (v0.1.5)
Date: 25th September 2020
We added/updated the following features:
​Read JSON files from local and remote URL into DataFrame (New feature)
​Read Excel files from local or remote URL into DataFrame (New feature)
Fix string comparison bug in query function (Fix)
Add append function for DataFrame and Series (New feature)
Fix null value bug when creating DataFrame from JSON files (Fix)
Add relative import for reading files into DataFrame
Add sort_index function to DataFrame and Series (New feature)
Minor patch and overall optimizations (Fix)
Contributors: Rising Odegua, Stephen Oni, Jhenner Tigreros, Aditya Zope​
Release (v0.1.0-beta)
Date: 15th August 2020
This is a minor release for browser-based environments. We added/updated the following features:
Ability to create DataFrame/Series from Tensors
Add iloc function for Series
Update addColumns function to accept Series
Add inplace option for fillna​
Fix bug in rename function of DataFrame
Add Inplace option for query​
Fixed upper bound bug in indexing
Contributors: Rising Odegua, Stephen Oni