Several functions introduced in Aster et al.'s book on inverse theory. The functions are often translations of MATLAB code developed by the authors to illustrate concepts of inverse theory as applied to geophysics. Generalized inversion, tomographic inversion algorithms (conjugate gradients, 'ART' and 'SIRT'), non-linear least squares, first and second order Tikhonov regularization, roughness constraints, and procedures for estimating smoothing parameters are included.

Geophysical Inverse Theory and Optimization

package-ubuntu-20.04-r-4.0.5#cran#PEIP-2.2-3

<p>Number of non-zero elements in a vector
</p>

<table summary="R argblock"><tr valign="top">
<td><code>h</code></td>
<td>
<p>vector
</p>
</td>
</tr></table>

<p>Jonathan M. Lees&lt;jonathan.lees@unc.edu&gt;
</p>

package-ubuntu-20.04-r-4.0.5#cran#PEIP-2.2-3#docs#nnz

nnz

Description

Usage

Arguments

Value

Author(s)

Examples

PEIP

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