stretch

Shifts and stretches the values of a vector or array to a desired interval, while maintaining the shape of the input argument

Collection of routines for efficient scientific computations in physics and astrophysics. These routines include utility functions, numerical computation tools, as well as visualisation tools. They can be used, for example, for generating random numbers from spherical and custom distributions, information and entropy analysis, special Fourier transforms, two-point correlation estimation (e.g. as in Landy & Szalay (1993) <doi:10.1086/172900>), binning & gridding of point sets, 2D interpolation, Monte Carlo integration, vector arithmetic and coordinate transformations. Also included is a non-exhaustive list of important constants and cosmological conversion functions. The graphics routines can be used to produce and export publication-ready scientific plots and movies, e.g. as used in Obreschkow et al. (2020, MNRAS Vol 493, Issue 3, Pages 4551–4569). These routines include special color scales, projection functions, and bitmap handling routines.

Danail Obreschkow

cooltools

Practical Tools for Scientific Computations and Visualizations

stretch function

<dl><dt>x</dt>
<dd>vector or array</dd>
<dt>min</dt>
<dd>minimum value</dd>
<dt>max</dt>
<dd>maximum value</dd>
<dt>invert</dt>
<dd>logical flag specifying whether the data should be inverted, such that the smallest input value maps to max and the largest input value maps to min.</dd>
<dt>gamma</dt>
<dd>optional argument specifying a non-linear transformation x-&gt;x^gamma, if gamma&gt;0, or x-&gt;1-(1-x)^(-gamma), if gamma&lt;0.</dd>
<dt>na</dt>
<dd>optional value specifying the value assigned to non-numbers (NA and NaN)</dd></dl>

Arguments

Author

Stretch values to a custom range — stretch

<dl>

<dt>x</dt>
<dd>vector or array</dd>


<dt>min</dt>
<dd>minimum value</dd>


<dt>max</dt>
<dd>maximum value</dd>


<dt>invert</dt>
<dd>logical flag specifying whether the data should be inverted, such that the smallest input value maps to max and the largest input value maps to min.</dd>


<dt>gamma</dt>
<dd>optional argument specifying a non-linear transformation x-&gt;x^gamma, if gamma&gt;0, or x-&gt;1-(1-x)^(-gamma), if gamma&lt;0.</dd>


<dt>na</dt>
<dd>optional value specifying the value assigned to non-numbers (NA and NaN)</dd>

</dl>

stretch: Stretch values to a custom range

Description

Usage

Value

Arguments

Author

See Also