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feature/StringConcatenator #52

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merged 4 commits into from
Jan 17, 2023
Merged

feature/StringConcatenator #52

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9eccc4b
StringConcatenator added to strings.py
davidhopkinson26 Dec 13, 2022
f79775f
added StringConcatenator to test_transformers.py
davidhopkinson26 Dec 13, 2022
7ade9ba
added more specific wording on trasformer descriptions
davidhopkinson26 Jan 17, 2023
bd7793b
fixed typo and black formatting1
davidhopkinson26 Jan 17, 2023
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301 changes: 301 additions & 0 deletions examples/strings/StringConcatenator.ipynb
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Original file line number Diff line number Diff line change
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"cells": [
{
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"source": [
"# StringConcatenator\n",
"This notebook shows the functionality of the `StringConcatenator` class. This Transformer combines data from specified columns, of mixed datatypes, into a new column containing one string."
]
},
{
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"import pandas as pd\n",
"import numpy as np"
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"source": [
"import tubular\n",
"from tubular.strings import StringConcatenator"
]
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"tubular.__version__"
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"source": [
"## Create sample data"
]
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"source": [
"character_df = pd.DataFrame(([':', ')', 5], [':', '(', 3]), columns=['c1', 'c2', 'c3'])"
]
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"source": [
"## Simple usage"
]
},
{
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"metadata": {},
"source": [
"### Initialising StringConcatenatorTransformer"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"The user must specify the following;\n",
"- `columns` giving the columns to join\n",
"- `new column` giving the name of the new column\n",
"- `separator` giving the separator for joining (optional)"
]
},
{
"cell_type": "code",
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"to_merge = ['c1', 'c2', 'c3']\n",
"\n",
"join_columns = StringConcatenator(to_merge, \"merged\", \"-\")"
]
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{
"cell_type": "markdown",
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"source": [
"### StringConcatenatorTransformer fit\n",
"There is no fit method for the StringConcatenatorTransformer as the methods that it can run do not 'learn' anything from the data."
]
},
{
"cell_type": "markdown",
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"source": [
"### StringConcatenatorTransformer transform"
]
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"joined_df = join_columns.transform(character_df)"
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