[[&lt;-

[[&lt;-,SoilProfileCollection-method

[[&lt;-,SoilProfileCollection,ANY,ANY-method

Add or change the data from a column accessed by name. Column names other
than profile ID are not shared between site and horizons. The benefit of
using double bracket setter over <code>$</code> is that <code>name</code> can be
calculated, whereas with <code>$</code>, it must be known a priori and hard coded.
When using the double bracket setter the length of input and output matching
either the number of sites or number of horizons is used to determine which
slot new columns are assigned to.

The Algorithms for Quantitative Pedology (AQP) project was started in 2009 to organize a loosely-related set of concepts and source code on the topic of soil profile visualization, aggregation, and classification into this package (aqp). Over the past 8 years, the project has grown into a suite of related R packages that enhance and simplify the quantitative analysis of soil profile data. Central to the AQP project is a new vocabulary of specialized functions and data structures that can accommodate the inherent complexity of soil profile information; freeing the scientist to focus on ideas rather than boilerplate data processing tasks <doi:10.1016/j.cageo.2012.10.020>. These functions and data structures have been extensively tested and documented, applied to projects involving hundreds of thousands of soil profiles, and deeply integrated into widely used tools such as SoilWeb <https://casoilresource.lawr.ucdavis.edu/soilweb-apps>. Components of the AQP project (aqp, soilDB, sharpshootR, soilReports packages) serve an important role in routine data analysis within the USDA-NRCS Soil Science Division. The AQP suite of R packages offer a convenient platform for bridging the gap between pedometric theory and practice.

Dylan Beaudette

Algorithms for Quantitative Pedology

Pierre Roudier

Andrew Brown

[[&lt;- function

<dl><dt>x</dt>
<dd>a SoilProfileCollection</dd>
<dt>i</dt>
<dd>an expression resolving to a single column name in site or horizon
table-</dd>
<dt>value</dt>
<dd>New value to replace -- unit length or equal in length to number
of sites or horizons in the collection.</dd></dl>

Arguments

Add or change column of horizon or site data in a SoilProfileCollection — [[&lt;-

<dl>

<dt>x</dt>
<dd>a SoilProfileCollection</dd>


<dt>i</dt>
<dd>an expression resolving to a single column name in site or horizon
table-</dd>


<dt>value</dt>
<dd>New value to replace -- unit length or equal in length to number
of sites or horizons in the collection.</dd>

</dl>

[[<-: Add or change column of horizon or site data in a SoilProfileCollection

Description

Usage

Arguments