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Danfo.js Documentation
Getting Started
API reference
General Functions
Input/Output
Series
Creating a Series
Series.append
Series.cumsum
Series.cummax
Series.cumprod
Series.cummin
Series.str.split
Series.str.len
Series.str.join
Series.str.trim
Series.str.substring
Series.str.substr
Series.str.slice
Series.str.search
Series.str.repeat
Series.str.replace
Series.str.lastIndexOf
Series.str.indexOf
Series.str.includes
Series.str.endsWith
Series.str.startsWith
Series.str.concat
Series.str.charAt
Series.str.toUpperCase
Series.str.toLowerCase
Series.str.capitalize
Series.dt.seconds
Series.dt.minutes
Series.dt.monthday
Series.dt.month_name
Series.dt.hour
Series.dt.weekdays
Series.dt.day
Series.dt.month
Series.dt.year
Series.argmax
Series.argmin
Series.argsort
Series.replace
Series.isna
Series.fillna
Series.dropna
Series.drop_duplicates
Series.value_counts
Series.nunique
Series.unique
Series.abs
Series.ne
Series.eq
Series.ge
Series.le
Series.gt
Series.lt
Series.iloc
Series.loc
Series.ndim
Series.shape
Series.dtype
Series.values
Series.tensor
Series.index
Series.apply
Series.map
Series.set_index
Series.reset_index
Series.describe
Series.copy
Series.sort_values
Series.var
Series.std
Series.round
Series.minimum
Series.maximum
Series.count
Series.sum
Series.max
Series.min
Series.mode
Series.median
Series.mean
Series.mod
Series.pow
Series.div
Series.mul
Series.sub
Series.add
Series.sample
Series.tail
Series.head
Series.and
Series.or
Dataframe
Configuration Options
Plotting
Groupby
User Guides
Building Data Driven Applications with Danfo.js - Book
Contributing Guide
Release Notes
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Series.isna
Detect Missing values
danfo.Series.isna() [source]
Parameters: None
Returns: Series (Boolean element)
Example
Node
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const dfd = require("danfojs-node")
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​
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let data1 = [NaN, undefined, "girl", "Man"]
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let sf = new dfd.Series(data1)
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​
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sf.isna().print()
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Output
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╔═══╤══════════════════════╗
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║ │ 0 ║
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╟───┼──────────────────────╢
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║ 0 │ true ║
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╟───┼──────────────────────╢
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║ 1 │ true ║
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╟───┼──────────────────────╢
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║ 2 │ false ║
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╟───┼──────────────────────╢
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║ 3 │ false ║
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╚═══╧══════════════════════╝
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