09-19-2022, 02:34 PM
How to Find the Longest String in a NumPy Array?
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<div class="kksr-legend" style="font-size: 19.2px;"> 5/5 – (1 vote) </div>
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<h2>Python Longest String in NumPy Array</h2>
<p class="has-global-color-8-background-color has-background">To find the longest string in a given NumPy array, say <code>arr</code>, you can use the <code>max(arr, key=len)</code> function that determines the maximum by comparing the length of the array elements using the <code><a href="https://blog.finxter.com/python-len/" data-type="post" data-id="22386" target="_blank" rel="noreferrer noopener">len()</a></code> function as a key for comparison.</p>
<pre class="EnlighterJSRAW" data-enlighter-language="python" data-enlighter-theme="" data-enlighter-highlight="4" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">import numpy as np arr = np.array(['Alice', 'Bob', 'Carl'])
print(max(arr, key=len))
# Alice
</pre>
<p>You can find more about the powerful <code>max()</code> function in our detailed blog tutorial:</p>
<p class="has-base-background-color has-background"><img src="https://s.w.org/images/core/emoji/14.0.0/72x72/1f449.png" alt="?" class="wp-smiley" style="height: 1em; max-height: 1em;" /> <strong>Recommended Tutorial</strong>: <a href="https://blog.finxter.com/python-max/" data-type="post" data-id="21661">Python Maximum Function</a></p>
<h2>Python Length of Longest String in NumPy Array</h2>
<p class="has-global-color-8-background-color has-background">To find the length of the longest string in a NumPy array <code>arr</code>, use the <code>max(arr, key=len)</code> function to obtain the string with the maximum length and then pass this max string into the <code>len()</code> function to obtain the number of characters of the max string.</p>
<p><code>len(max(arr, key=len))</code></p>
<p>Here’s a more detailed code example of a simple 1D NumPy Array:</p>
<pre class="EnlighterJSRAW" data-enlighter-language="python" data-enlighter-theme="" data-enlighter-highlight="9-11" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">import numpy as np arr = np.array(['Alice', 'Bob', 'Carl']) # Print Longest String:
print(max(arr, key=len))
# Alice # Print Length of Longest String
print(len(max(arr, key=len)))
# 5
</pre>
<h2>Get Longest String from NumPy Axis (2D, Column or Row)</h2>
<p class="has-global-color-8-background-color has-background">To get the longest string from a certain NumPy array axis (e.g., row or column), first use simple <a href="https://blog.finxter.com/how-to-extract-specific-numpy-columns-5-best-ways/" data-type="post" data-id="523056" target="_blank" rel="noreferrer noopener">NumPy slicing and indexing</a> to get that axis (e.g., <code>arr[0, :]</code> to get the first row) and pass it into the <code>max()</code> function with the <code>key</code> argument set to the length function like so: <code>max(arr[0, :], key=len)</code>.</p>
<p>Here’s an example to get the longest string of the <strong>first row</strong> of a 2D array:</p>
<pre class="EnlighterJSRAW" data-enlighter-language="python" data-enlighter-theme="" data-enlighter-highlight="7" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">import numpy as np arr = np.array([['Alice', 'Bob', 'Carl'], ['Ann', 'Zoe', 'Leonard']]) print(max(arr[0, :], key=len))
# Alice
</pre>
<p>Here’s an example to get the longest string of the <strong>third column</strong> of a 2D array:</p>
<pre class="EnlighterJSRAW" data-enlighter-language="python" data-enlighter-theme="" data-enlighter-highlight="" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">print(max(arr[:, 2], key=len))
# Leonard</pre>
<p>You get the idea. <img src="https://s.w.org/images/core/emoji/14.0.0/72x72/1f642.png" alt="?" class="wp-smiley" style="height: 1em; max-height: 1em;" /></p>
<p>If you want to get the longest string from the whole NumPy array, not only from a column or row or axis, first flatten it and then pass the flattened array into the <code>max()</code> function using the <code>key=len</code> argument.</p>
<p class="has-base-background-color has-background"><img src="https://s.w.org/images/core/emoji/14.0.0/72x72/1f449.png" alt="?" class="wp-smiley" style="height: 1em; max-height: 1em;" /> <strong>Recommended Tutorial</strong>: <a href="https://blog.finxter.com/how-to-flatten-a-numpy-array/" data-type="post" data-id="686189" target="_blank" rel="noreferrer noopener">How to Flatten a NumPy Array?</a></p>
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https://www.sickgaming.net/blog/2022/09/...mpy-array/
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<div class="kksr-legend" style="font-size: 19.2px;"> 5/5 – (1 vote) </div>
</div>
<h2>Python Longest String in NumPy Array</h2>
<p class="has-global-color-8-background-color has-background">To find the longest string in a given NumPy array, say <code>arr</code>, you can use the <code>max(arr, key=len)</code> function that determines the maximum by comparing the length of the array elements using the <code><a href="https://blog.finxter.com/python-len/" data-type="post" data-id="22386" target="_blank" rel="noreferrer noopener">len()</a></code> function as a key for comparison.</p>
<pre class="EnlighterJSRAW" data-enlighter-language="python" data-enlighter-theme="" data-enlighter-highlight="4" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">import numpy as np arr = np.array(['Alice', 'Bob', 'Carl'])
print(max(arr, key=len))
# Alice
</pre>
<p>You can find more about the powerful <code>max()</code> function in our detailed blog tutorial:</p>
<p class="has-base-background-color has-background"><img src="https://s.w.org/images/core/emoji/14.0.0/72x72/1f449.png" alt="?" class="wp-smiley" style="height: 1em; max-height: 1em;" /> <strong>Recommended Tutorial</strong>: <a href="https://blog.finxter.com/python-max/" data-type="post" data-id="21661">Python Maximum Function</a></p>
<h2>Python Length of Longest String in NumPy Array</h2>
<p class="has-global-color-8-background-color has-background">To find the length of the longest string in a NumPy array <code>arr</code>, use the <code>max(arr, key=len)</code> function to obtain the string with the maximum length and then pass this max string into the <code>len()</code> function to obtain the number of characters of the max string.</p>
<p><code>len(max(arr, key=len))</code></p>
<p>Here’s a more detailed code example of a simple 1D NumPy Array:</p>
<pre class="EnlighterJSRAW" data-enlighter-language="python" data-enlighter-theme="" data-enlighter-highlight="9-11" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">import numpy as np arr = np.array(['Alice', 'Bob', 'Carl']) # Print Longest String:
print(max(arr, key=len))
# Alice # Print Length of Longest String
print(len(max(arr, key=len)))
# 5
</pre>
<h2>Get Longest String from NumPy Axis (2D, Column or Row)</h2>
<p class="has-global-color-8-background-color has-background">To get the longest string from a certain NumPy array axis (e.g., row or column), first use simple <a href="https://blog.finxter.com/how-to-extract-specific-numpy-columns-5-best-ways/" data-type="post" data-id="523056" target="_blank" rel="noreferrer noopener">NumPy slicing and indexing</a> to get that axis (e.g., <code>arr[0, :]</code> to get the first row) and pass it into the <code>max()</code> function with the <code>key</code> argument set to the length function like so: <code>max(arr[0, :], key=len)</code>.</p>
<p>Here’s an example to get the longest string of the <strong>first row</strong> of a 2D array:</p>
<pre class="EnlighterJSRAW" data-enlighter-language="python" data-enlighter-theme="" data-enlighter-highlight="7" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">import numpy as np arr = np.array([['Alice', 'Bob', 'Carl'], ['Ann', 'Zoe', 'Leonard']]) print(max(arr[0, :], key=len))
# Alice
</pre>
<p>Here’s an example to get the longest string of the <strong>third column</strong> of a 2D array:</p>
<pre class="EnlighterJSRAW" data-enlighter-language="python" data-enlighter-theme="" data-enlighter-highlight="" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">print(max(arr[:, 2], key=len))
# Leonard</pre>
<p>You get the idea. <img src="https://s.w.org/images/core/emoji/14.0.0/72x72/1f642.png" alt="?" class="wp-smiley" style="height: 1em; max-height: 1em;" /></p>
<p>If you want to get the longest string from the whole NumPy array, not only from a column or row or axis, first flatten it and then pass the flattened array into the <code>max()</code> function using the <code>key=len</code> argument.</p>
<p class="has-base-background-color has-background"><img src="https://s.w.org/images/core/emoji/14.0.0/72x72/1f449.png" alt="?" class="wp-smiley" style="height: 1em; max-height: 1em;" /> <strong>Recommended Tutorial</strong>: <a href="https://blog.finxter.com/how-to-flatten-a-numpy-array/" data-type="post" data-id="686189" target="_blank" rel="noreferrer noopener">How to Flatten a NumPy Array?</a></p>
</div>
https://www.sickgaming.net/blog/2022/09/...mpy-array/