This function calculates PDI, defined as the sum of a number's digits raised to a given power.

A collection of toys to do things like generate Collatz and other interesting sequences, calculate a fraction which is a close approximation to some value (e.g., 22/7 or 355/113 for pi), and so on.

Carl Witthoft

FunWithNumbers

Fun with Fractions and Number Sequences

pdi function

<dl> <dt>x</dt>
<dd>The <code>bigz</code> integer to start with.</dd><dt>pwr</dt>
<dd>The power to which digits are raised. Default is 2.</dd><dt>base</dt>
<dd>The base of the source integer. Note that calculations within this function are performed in base 10. Default is 10.</dd>
</dl>

Arguments

Carl Witthoft, <a href="/link/carl%40witthoft.com?package=FunWithNumbers&version=1.2" data-mini-rdoc="FunWithNumbers::carl@witthoft.com">carl@witthoft.com</a>

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Calculate Perfect Digital Invariant ~~ — pdi

<dl>

 <dt>x</dt>
<dd>The <code>bigz</code> integer to start with.</dd>

<dt>pwr</dt>
<dd>The power to which digits are raised. Default is 2.</dd>

<dt>base</dt>
<dd>The base of the source integer. Note that calculations within this function are performed in base 10. Default is 10.</dd>


</dl>

Carl Witthoft, <a href='mailto:carl@witthoft.com'>carl@witthoft.com</a>

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pdi: Calculate Perfect Digital Invariant ~~

Description

Usage

Value

Arguments

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