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+<title>MayaChemTools:Documentation:Fingerprints::AtomNeighborhoodsFingerprints.pm</title>
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+<tr align="left" valign="top"><td width="33%" align="left"><a href="./FileUtil.html" title="FileUtil.html">Previous</a>&nbsp;&nbsp;<a href="./index.html" title="Table of Contents">TOC</a>&nbsp;&nbsp;<a href="./AtomTypesFingerprints.html" title="AtomTypesFingerprints.html">Next</a></td><td width="34%" align="middle"><strong>Fingerprints::AtomNeighborhoodsFingerprints.pm</strong></td><td width="33%" align="right"><a href="././code/AtomNeighborhoodsFingerprints.html" title="View source code">Code</a>&nbsp;|&nbsp;<a href="./../pdf/AtomNeighborhoodsFingerprints.pdf" title="PDF US Letter Size">PDF</a>&nbsp;|&nbsp;<a href="./../pdfgreen/AtomNeighborhoodsFingerprints.pdf" title="PDF US Letter Size with narrow margins: www.changethemargins.com">PDFGreen</a>&nbsp;|&nbsp;<a href="./../pdfa4/AtomNeighborhoodsFingerprints.pdf" title="PDF A4 Size">PDFA4</a>&nbsp;|&nbsp;<a href="./../pdfa4green/AtomNeighborhoodsFingerprints.pdf" title="PDF A4 Size with narrow margins: www.changethemargins.com">PDFA4Green</a></td></tr>
+</table>
+</div>
+<p>
+</p>
+<h2>NAME</h2>
+<p>AtomNeighborhoodsFingerprints</p>
+<p>
+</p>
+<h2>SYNOPSIS</h2>
+<p>use Fingerprints::AtomNeighborhoodsFingerprints;</p>
+<p>use Fingerprints::AtomNeighborhoodsFingerprints qw(:all);</p>
+<p>
+</p>
+<h2>DESCRIPTION</h2>
+<p><strong>AtomNeighborhoodsFingerprints</strong> [ Ref 53-56, Ref 73 ] class provides the following methods:</p>
+<p> <a href="#new">new</a>, <a href="#generatefingerprints">GenerateFingerprints</a>, <a href="#getdescription">GetDescription</a>, <a href="#setatomidentifiertype">SetAtomIdentifierType</a>
+, <a href="#setatomicinvariantstouse">SetAtomicInvariantsToUse</a>, <a href="#setfunctionalclassestouse">SetFunctionalClassesToUse</a>, <a href="#setmaxneighborhoodradius">SetMaxNeighborhoodRadius</a>
+, <a href="#setminneighborhoodradius">SetMinNeighborhoodRadius</a>, <a href="#stringifyatomneighborhoodsfingerprints">StringifyAtomNeighborhoodsFingerprints</a>
+</p><p><strong>AtomNeighborhoodsFingerprints</strong> is derived from <strong>Fingerprints</strong> class which in turn
+is  derived from <strong>ObjectProperty</strong> base class that provides methods not explicitly defined
+in <strong>AtomNeighborhoodsFingerprints</strong>, <strong>Fingerprints</strong> or <strong>ObjectProperty</strong> classes using Perl's
+AUTOLOAD functionality. These methods are generated on-the-fly for a specified object property:</p>
+<div class="OptionsBox">
+    Set&lt;PropertyName&gt;(&lt;PropertyValue&gt;);
+<br/>    $PropertyValue = Get&lt;PropertyName&gt;();
+<br/>    Delete&lt;PropertyName&gt;();</div>
+<p>The current release of MayaChemTools supports generation of <strong>AtomNeighborhoodsFingerprints</strong>
+corresponding to following <strong>AtomIdentifierTypes</strong>:</p>
+<div class="OptionsBox">
+    AtomicInvariantsAtomTypes, DREIDINGAtomTypes, EStateAtomTypes,
+<br/>    FunctionalClassAtomTypes, MMFF94AtomTypes, SLogPAtomTypes,
+<br/>    SYBYLAtomTypes, TPSAAtomTypes, UFFAtomTypes</div>
+<p>Based on the values specified for <strong>AtomIdentifierType</strong> along with other specified
+sucb as <strong>AtomicInvariantsToUse</strong> and <strong>FunctionalClassesToUse</strong>, initial atom types are
+assigned to all non-hydrogen atoms in a molecule. Using atom neighborhoods
+around each non-hydrogen central atom corresponding to radii between specified values
+<strong>MinNeighborhoodRadius</strong> and <strong>MaxNeighborhoodRadius</strong>, unique atom types at each radii
+level are counted and an atom neighborhood identifier is generated.</p>
+<p>The format of an atom neighborhood identifier around a central non-hydrogen atom at a
+specific radius is:</p>
+<div class="OptionsBox">
+    NR&lt;n&gt;-&lt;AtomType&gt;-ATC&lt;n&gt;</div>
+<div class="OptionsBox">
+    NR: Neighborhood radius
+<br/>    AtomType: Assigned atom type
+<br/>    ATC: Atom type count</div>
+<p>The atom neighborhood identifier for non-hydrogen central atom corresponding to all specified radii
+is generated by concatenating neighborhood identifiers at each radii by colon as a delimiter:</p>
+<div class="OptionsBox">
+    NR&lt;n&gt;-&lt;AtomType&gt;-ATC&lt;n&gt;:NR&lt;n&gt;-&lt;AtomType&gt;-ATC&lt;n&gt;:...</div>
+<p>The atom neighborhood identifiers for all non-hydrogen central atoms at all specified radii are
+concatenated using space as a delimiter and constitute atom neighborhood fingerprint of the molecule.</p>
+<p>The current release of MayaChemTools generates the following types of atom neighborhoods
+fingerprints vector strings:</p>
+<div class="OptionsBox">
+    FingerprintsVector;AtomNeighborhoods:AtomicInvariantsAtomTypes:MinRadi
+<br/>    us0:MaxRadius2;41;AlphaNumericalValues;ValuesString;NR0-C.X1.BO1.H3-AT
+<br/>    C1:NR1-C.X3.BO3.H1-ATC1:NR2-C.X1.BO1.H3-ATC1:NR2-C.X3.BO4-ATC1 NR0-C.X
+<br/>    1.BO1.H3-ATC1:NR1-C.X3.BO3.H1-ATC1:NR2-C.X1.BO1.H3-ATC1:NR2-C.X3.BO4-A
+<br/>    TC1 NR0-C.X2.BO2.H2-ATC1:NR1-C.X2.BO2.H2-ATC1:NR1-C.X3.BO3.H1-ATC1:NR2
+<br/>    -C.X2.BO2.H2-ATC1:NR2-N.X3.BO3-ATC1:NR2-O.X1.BO1.H1-ATC1 NR0-C.X2.B...</div>
+<div class="OptionsBox">
+    FingerprintsVector;AtomNeighborhoods:DREIDINGAtomTypes:MinRadius0:MaxR
+<br/>    adius2;41;AlphaNumericalValues;ValuesString;NR0-C_2-ATC1:NR1-C_3-ATC1:
+<br/>    NR1-O_2-ATC1:NR1-O_3-ATC1:NR2-C_3-ATC1 NR0-C_2-ATC1:NR1-C_R-ATC1:NR1-N
+<br/>    _3-ATC1:NR1-O_2-ATC1:NR2-C_R-ATC3 NR0-C_3-ATC1:NR1-C_2-ATC1:NR1-C_3-AT
+<br/>    C1:NR2-C_3-ATC1:NR2-O_2-ATC1:NR2-O_3-ATC2 NR0-C_3-ATC1:NR1-C_3-ATC1:NR
+<br/>    1-N_R-ATC1:NR2-C_3-ATC1:NR2-C_R-ATC2 NR0-C_3-ATC1:NR1-C_3-ATC1:NR2-...</div>
+<div class="OptionsBox">
+    FingerprintsVector;AtomNeighborhoods:EStateAtomTypes:MinRadius0:MaxRad
+<br/>    ius2;41;AlphaNumericalValues;ValuesString;NR0-aaCH-ATC1:NR1-aaCH-ATC1:
+<br/>    NR1-aasC-ATC1:NR2-aaCH-ATC1:NR2-aasC-ATC1:NR2-sF-ATC1 NR0-aaCH-ATC1:NR
+<br/>    1-aaCH-ATC1:NR1-aasC-ATC1:NR2-aaCH-ATC1:NR2-aasC-ATC1:NR2-sF-ATC1 NR0-
+<br/>    aaCH-ATC1:NR1-aaCH-ATC1:NR1-aasC-ATC1:NR2-aaCH-ATC1:NR2-aasC-ATC2 NR0-
+<br/>    aaCH-ATC1:NR1-aaCH-ATC1:NR1-aasC-ATC1:NR2-aaCH-ATC1:NR2-aasC-ATC2 N...</div>
+<div class="OptionsBox">
+    FingerprintsVector;AtomNeighborhoods:FunctionalClassAtomTypes:MinRadiu
+<br/>    s0:MaxRadius2;41;AlphaNumericalValues;ValuesString;NR0-Ar-ATC1:NR1-Ar-
+<br/>    ATC1:NR1-Ar.HBA-ATC1:NR1-None-ATC1:NR2-Ar-ATC2:NR2-None-ATC4 NR0-Ar-AT
+<br/>    C1:NR1-Ar-ATC2:NR1-Ar.HBA-ATC1:NR2-Ar-ATC5:NR2-None-ATC1 NR0-Ar-ATC1:N
+<br/>    R1-Ar-ATC2:NR1-HBD-ATC1:NR2-Ar-ATC2:NR2-None-ATC1 NR0-Ar-ATC1:NR1-Ar-A
+<br/>    TC2:NR1-Hal-ATC1:NR2-Ar-ATC2 NR0-Ar-ATC1:NR1-Ar-ATC2:NR1-None-ATC1:...</div>
+<div class="OptionsBox">
+    FingerprintsVector;AtomNeighborhoods:MMFF94AtomTypes:MinRadius0:MaxRad
+<br/>    ius2;41;AlphaNumericalValues;ValuesString;NR0-C5A-ATC1:NR1-C5B-ATC1:NR
+<br/>    1-CB-ATC1:NR1-N5-ATC1:NR2-C5A-ATC1:NR2-C5B-ATC1:NR2-CB-ATC3:NR2-CR-ATC
+<br/>    1 NR0-C5A-ATC1:NR1-C5B-ATC1:NR1-CR-ATC1:NR1-N5-ATC1:NR2-C5A-ATC1:NR2-C
+<br/>    5B-ATC1:NR2-C=ON-ATC1:NR2-CR-ATC3 NR0-C5B-ATC1:NR1-C5A-ATC1:NR1-C5B-AT
+<br/>    C1:NR1-C=ON-ATC1:NR2-C5A-ATC1:NR2-CB-ATC1:NR2-CR-ATC1:NR2-N5-ATC1:N...</div>
+<div class="OptionsBox">
+    FingerprintsVector;AtomNeighborhoods:SLogPAtomTypes:MinRadius0:MaxRadi
+<br/>    us2;41;AlphaNumericalValues;ValuesString;NR0-C1-ATC1:NR1-C10-ATC1:NR1-
+<br/>    CS-ATC1:NR2-C1-ATC1:NR2-N11-ATC1:NR2-O2-ATC1 NR0-C1-ATC1:NR1-C11-ATC1:
+<br/>    NR2-C1-ATC1:NR2-C21-ATC1 NR0-C1-ATC1:NR1-C11-ATC1:NR2-C1-ATC1:NR2-C21-
+<br/>    ATC1 NR0-C1-ATC1:NR1-C5-ATC1:NR1-CS-ATC1:NR2-C1-ATC1:NR2-O2-ATC2:NR2-O
+<br/>    9-ATC1 NR0-C1-ATC1:NR1-CS-ATC2:NR2-C1-ATC2:NR2-O2-ATC2 NR0-C10-ATC1...</div>
+<div class="OptionsBox">
+    FingerprintsVector;AtomNeighborhoods:SYBYLAtomTypes:MinRadius0:MaxRadi
+<br/>    us2;41;AlphaNumericalValues;ValuesString;NR0-C.2-ATC1:NR1-C.3-ATC1:NR1
+<br/>    -O.co2-ATC2:NR2-C.3-ATC1 NR0-C.2-ATC1:NR1-C.ar-ATC1:NR1-N.am-ATC1:NR1-
+<br/>    O.2-ATC1:NR2-C.ar-ATC3 NR0-C.3-ATC1:NR1-C.2-ATC1:NR1-C.3-ATC1:NR2-C.3-
+<br/>    ATC1:NR2-O.3-ATC1:NR2-O.co2-ATC2 NR0-C.3-ATC1:NR1-C.3-ATC1:NR1-N.ar-AT
+<br/>    C1:NR2-C.3-ATC1:NR2-C.ar-ATC2 NR0-C.3-ATC1:NR1-C.3-ATC1:NR2-C.3-ATC...</div>
+<div class="OptionsBox">
+    FingerprintsVector;AtomNeighborhoods:TPSAAtomTypes:MinRadius0:MaxRadiu
+<br/>    s2;41;AlphaNumericalValues;ValuesString;NR0-N21-ATC1:NR1-None-ATC3:NR2
+<br/>    -None-ATC5 NR0-N7-ATC1:NR1-None-ATC2:NR2-None-ATC3:NR2-O3-ATC1 NR0-Non
+<br/>    e-ATC1:NR1-N21-ATC1:NR1-None-ATC1:NR2-None-ATC3 NR0-None-ATC1:NR1-N21-
+<br/>    ATC1:NR1-None-ATC2:NR2-None-ATC6 NR0-None-ATC1:NR1-N21-ATC1:NR1-None-A
+<br/>    TC2:NR2-None-ATC6 NR0-None-ATC1:NR1-N7-ATC1:NR1-None-ATC1:NR1-O3-AT...</div>
+<div class="OptionsBox">
+    FingerprintsVector;AtomNeighborhoods:UFFAtomTypes:MinRadius0:MaxRadius
+<br/>    2;41;AlphaNumericalValues;ValuesString;NR0-C_2-ATC1:NR1-C_3-ATC1:NR1-O
+<br/>    _2-ATC1:NR1-O_3-ATC1:NR2-C_3-ATC1 NR0-C_2-ATC1:NR1-C_R-ATC1:NR1-N_3-AT
+<br/>    C1:NR1-O_2-ATC1:NR2-C_R-ATC3 NR0-C_3-ATC1:NR1-C_2-ATC1:NR1-C_3-ATC1:NR
+<br/>    2-C_3-ATC1:NR2-O_2-ATC1:NR2-O_3-ATC2 NR0-C_3-ATC1:NR1-C_3-ATC1:NR1-N_R
+<br/>    -ATC1:NR2-C_3-ATC1:NR2-C_R-ATC2 NR0-C_3-ATC1:NR1-C_3-ATC1:NR2-C_3-A...</div>
+<p>
+</p>
+<h2>METHODS</h2>
+<dl>
+<dt><strong><a name="new" class="item"><strong>new</strong></a></strong></dt>
+<dd>
+<div class="OptionsBox">
+    $NewAtomNeighborhoodsFingerprints = new AtomNeighborhoodsFingerprints(
+                                                   %NamesAndValues);</div>
+<p>Using specified <em>AtomNeighborhoodsFingerprints</em> property names and values hash, <strong>new</strong>
+method creates a new object and returns a reference to newly created <strong>AtomNeighborhoodsFingerprints</strong>
+object. By default, the following properties are initialized:</p>
+<div class="OptionsBox">
+    Molecule = ''
+<br/>    Type = 'AtomNeighborhoods'
+<br/>    MinNeighborhoodRadius = 0
+<br/>    MaxNeighborhoodRadius = 2
+<br/>    AtomIdentifierType = ''
+<br/>    AtomicInvariantsToUse = ['AS', 'X', 'BO', 'H', 'FC', 'MN']
+<br/>    FunctionalClassesToUse = ['HBD', 'HBA', 'PI', 'NI', 'Ar', 'Hal']</div>
+<p>Examples:</p>
+<div class="OptionsBox">
+    $AtomNeighborhoodsFingerprints = new AtomNeighborhoodsFingerprints(
+                              'Molecule' =&gt; $Molecule,
+                              'AtomIdentifierType' =&gt;
+                                              &quot;AtomicInvariantsAtomTypes&quot;);</div>
+<div class="OptionsBox">
+    $AtomNeighborhoodsFingerprints = new AtomNeighborhoodsFingerprints(
+                              'Molecule' =&gt; $Molecule,
+                              'MinNeighborhoodRadius' =&gt; 0,
+                              'MaxNeighborhoodRadius' =&gt; 2,
+                              'AtomIdentifierType' =&gt;
+                                              'AtomicInvariantsAtomTypes',
+                              'AtomicInvariantsToUse' =&gt;
+                                              ['AS', 'X', 'BO', 'H', 'FC'] );</div>
+<div class="OptionsBox">
+    $AtomNeighborhoodsFingerprints = new AtomNeighborhoodsFingerprints(
+                              'Molecule' =&gt; $Molecule,
+                              'AtomIdentifierType' =&gt;
+                                              'SYBYLAtomTypes');</div>
+<div class="OptionsBox">
+    $AtomNeighborhoodsFingerprints = new AtomNeighborhoodsFingerprints(
+                              'Molecule' =&gt; $Molecule,
+                              'AtomIdentifierType' =&gt;
+                                              'MMFF94AtomTypes');</div>
+<div class="OptionsBox">
+    $AtomNeighborhoodsFingerprints = new AtomNeighborhoodsFingerprints(
+                              'Molecule' =&gt; $Molecule,
+                              'AtomIdentifierType' =&gt;
+                                              'AtomicInvariantsAtomTypes');</div>
+<div class="OptionsBox">
+    $AtomNeighborhoodsFingerprints = new AtomNeighborhoodsFingerprints(
+                              'Molecule' =&gt; $Molecule,
+                              'MinNeighborhoodRadius' =&gt; 0,
+                              'MaxNeighborhoodRadius' =&gt; 2,
+                              'AtomIdentifierType' =&gt;
+                                              'FunctionalClassAtomTypes',
+                              'FunctionalClassesToUse' =&gt;
+                                          ['HBD', 'HBA', 'PI', 'NI', 'Ar', 'Hal'] );</div>
+<div class="OptionsBox">
+    $AtomNeighborhoodsFingerprints-&gt;GenerateFingerprints();
+<br/>    print &quot;$AtomNeighborhoodsFingerprints\n&quot;;</div>
+</dd>
+<dt><strong><a name="generatefingerprints" class="item"><strong>GenerateFingerprints</strong></a></strong></dt>
+<dd>
+<div class="OptionsBox">
+    $AtomNeighborhoodsFingerprints-&gt;GenerateFingerprints();</div>
+<p>Generates atom neighborhood fingerprints and returns <em>AtomNeighborhoodsFingerprints</em>.</p>
+</dd>
+<dt><strong><a name="getdescription" class="item"><strong>GetDescription</strong></a></strong></dt>
+<dd>
+<div class="OptionsBox">
+    $Description = $AtomNeighborhoodsFingerprints-&gt;GetDescription();</div>
+<p>Returns a string containing description of atom neighborhood fingerprints.</p>
+</dd>
+<dt><strong><a name="setatomidentifiertype" class="item"><strong>SetAtomIdentifierType</strong></a></strong></dt>
+<dd>
+<div class="OptionsBox">
+    $AtomNeighborhoodsFingerprints-&gt;SetAtomIdentifierType($IdentifierType);</div>
+<p>Sets atom <em>IdentifierType</em> to use during atom neighborhood fingerprints generation and
+returns <em>AtomNeighborhoodsFingerprints</em>.</p>
+<p>Possible values: <em>AtomicInvariantsAtomTypes, DREIDINGAtomTypes, EStateAtomTypes,
+FunctionalClassAtomTypes, MMFF94AtomTypes, SLogPAtomTypes, SYBYLAtomTypes,
+TPSAAtomTypes, UFFAtomTypes</em>.</p>
+</dd>
+<dt><strong><a name="setatomicinvariantstouse" class="item"><strong>SetAtomicInvariantsToUse</strong></a></strong></dt>
+<dd>
+<div class="OptionsBox">
+    $AtomNeighborhoodsFingerprints-&gt;SetAtomicInvariantsToUse($ValuesRef);
+<br/>    $AtomNeighborhoodsFingerprints-&gt;SetAtomicInvariantsToUse(@Values);</div>
+<p>Sets atomic invariants to use during <em>AtomicInvariantsAtomTypes</em> value of <em>AtomIdentifierType</em>
+for atom neighborhood fingerprints generation and returns <em>AtomNeighborhoodsFingerprints</em>.</p>
+<p>Possible values for atomic invariants are: <em>AS, X, BO,  LBO, SB, DB, TB,
+H, Ar, RA, FC, MN, SM</em>. Default value: <em>AS,X,BO,H,FC</em>.</p>
+<p>The atomic invariants abbreviations correspond to:</p>
+<div class="OptionsBox">
+    AS = Atom symbol corresponding to element symbol</div>
+<div class="OptionsBox">
+    X&lt;n&gt;   = Number of non-hydrogen atom neighbors or heavy atoms
+<br/>    BO&lt;n&gt; = Sum of bond orders to non-hydrogen atom neighbors or heavy atoms
+<br/>    LBO&lt;n&gt; = Largest bond order of non-hydrogen atom neighbors or heavy atoms
+<br/>    SB&lt;n&gt; = Number of single bonds to non-hydrogen atom neighbors or heavy atoms
+<br/>    DB&lt;n&gt; = Number of double bonds to non-hydrogen atom neighbors or heavy atoms
+<br/>    TB&lt;n&gt; = Number of triple bonds to non-hydrogen atom neighbors or heavy atoms
+<br/>    H&lt;n&gt;   = Number of implicit and explicit hydrogens for atom
+<br/>    Ar     = Aromatic annotation indicating whether atom is aromatic
+<br/>    RA     = Ring atom annotation indicating whether atom is a ring
+<br/>    FC&lt;+n/-n&gt; = Formal charge assigned to atom
+<br/>    MN&lt;n&gt; = Mass number indicating isotope other than most abundant isotope
+<br/>    SM&lt;n&gt; = Spin multiplicity of atom. Possible values: 1 (singlet), 2 (doublet) or
+            3 (triplet)</div>
+<p>Atom type generated by AtomTypes::AtomicInvariantsAtomTypes class corresponds to:</p>
+<div class="OptionsBox">
+    AS.X&lt;n&gt;.BO&lt;n&gt;.LBO&lt;n&gt;.&lt;SB&gt;&lt;n&gt;.&lt;DB&gt;&lt;n&gt;.&lt;TB&gt;&lt;n&gt;.H&lt;n&gt;.Ar.RA.FC&lt;+n/-n&gt;.MN&lt;n&gt;.SM&lt;n&gt;</div>
+<p>Except for AS which is a required atomic invariant in atom types, all other atomic invariants are
+optional. Atom type specification doesn't include atomic invariants with zero or undefined values.</p>
+<p>In addition to usage of abbreviations for specifying atomic invariants, the following descriptive words
+are also allowed:</p>
+<div class="OptionsBox">
+    X : NumOfNonHydrogenAtomNeighbors or NumOfHeavyAtomNeighbors
+<br/>    BO : SumOfBondOrdersToNonHydrogenAtoms or SumOfBondOrdersToHeavyAtoms
+<br/>    LBO : LargestBondOrderToNonHydrogenAtoms or LargestBondOrderToHeavyAtoms
+<br/>    SB :  NumOfSingleBondsToNonHydrogenAtoms or NumOfSingleBondsToHeavyAtoms
+<br/>    DB : NumOfDoubleBondsToNonHydrogenAtoms or NumOfDoubleBondsToHeavyAtoms
+<br/>    TB : NumOfTripleBondsToNonHydrogenAtoms or NumOfTripleBondsToHeavyAtoms
+<br/>    H :  NumOfImplicitAndExplicitHydrogens
+<br/>    Ar : Aromatic
+<br/>    RA : RingAtom
+<br/>    FC : FormalCharge
+<br/>    MN : MassNumber
+<br/>    SM : SpinMultiplicity</div>
+<p><em>AtomTypes::AtomicInvariantsAtomTypes</em> module is used to assign atomic invariant
+atom types.</p>
+</dd>
+<dt><strong><a name="setfunctionalclassestouse" class="item"><strong>SetFunctionalClassesToUse</strong></a></strong></dt>
+<dd>
+<div class="OptionsBox">
+    $AtomNeighborhoodsFingerprints-&gt;SetFunctionalClassesToUse($ValuesRef);
+<br/>    $AtomNeighborhoodsFingerprints-&gt;SetFunctionalClassesToUse(@Values);</div>
+<p>Sets functional classes invariants to use during <em>FunctionalClassAtomTypes</em> value of <em>AtomIdentifierType</em>
+for atom neighborhoods fingerprints generation and returns <em>AtomNeighborhoodsFingerprints</em>.</p>
+<p>Possible values for atom functional classes are: <em>Ar, CA, H, HBA, HBD, Hal, NI, PI, RA</em>.
+Default value [ Ref 24 ]: <em>HBD,HBA,PI,NI,Ar,Hal</em>.</p>
+<p>The functional class abbreviations correspond to:</p>
+<div class="OptionsBox">
+    HBD: HydrogenBondDonor
+<br/>    HBA: HydrogenBondAcceptor
+<br/>    PI :  PositivelyIonizable
+<br/>    NI : NegativelyIonizable
+<br/>    Ar : Aromatic
+<br/>    Hal : Halogen
+<br/>    H : Hydrophobic
+<br/>    RA : RingAtom
+<br/>    CA : ChainAtom</div>
+<div class="OptionsBox">
+ Functional class atom type specification for an atom corresponds to:</div>
+<div class="OptionsBox">
+    Ar.CA.H.HBA.HBD.Hal.NI.PI.RA or None</div>
+<p><em>AtomTypes::FunctionalClassAtomTypes</em> module is used to assign functional class atom
+types. It uses following definitions [ Ref 60-61, Ref 65-66 ]:</p>
+<div class="OptionsBox">
+    HydrogenBondDonor: NH, NH2, OH
+<br/>    HydrogenBondAcceptor: N[!H], O
+<br/>    PositivelyIonizable: +, NH2
+<br/>    NegativelyIonizable: -, C(=O)OH, S(=O)OH, P(=O)OH</div>
+</dd>
+<dt><strong><a name="setmaxneighborhoodradius" class="item"><strong>SetMaxNeighborhoodRadius</strong></a></strong></dt>
+<dd>
+<div class="OptionsBox">
+    $AtomNeighborhoodsFingerprints-&gt;SetMaxNeighborhoodRadius($Radius);</div>
+<p>Sets maximum neighborhood radius to use during atom neighborhood fingerprints generation and
+returns <em>AtomNeighborhoodsFingerprints</em>.</p>
+</dd>
+<dt><strong><a name="setminneighborhoodradius" class="item"><strong>SetMinNeighborhoodRadius</strong></a></strong></dt>
+<dd>
+<div class="OptionsBox">
+    $AtomNeighborhoodsFingerprints-&gt;SetMinNeighborhoodRadius($Radius);</div>
+<p>Sets minimum neighborhood radius to use during atom neighborhood fingerprints generation and
+returns <em>AtomNeighborhoodsFingerprints</em>.</p>
+</dd>
+<dt><strong><a name="stringifyatomneighborhoodsfingerprints" class="item"><strong>StringifyAtomNeighborhoodsFingerprints</strong></a></strong></dt>
+<dd>
+<div class="OptionsBox">
+    $String = $Fingerprints-&gt;StringifyAtomNeighborhoodsFingerprints();</div>
+<p>Returns a string containing information about <em>AtomNeighborhoodsFingerprints</em> object.</p>
+</dd>
+</dl>
+<p>
+</p>
+<h2>AUTHOR</h2>
+<p><a href="mailto:msud@san.rr.com">Manish Sud</a></p>
+<p>
+</p>
+<h2>SEE ALSO</h2>
+<p><a href="./Fingerprints.html">Fingerprints.pm</a>,&nbsp<a href="./FingerprintsStringUtil.html">FingerprintsStringUtil.pm</a>,&nbsp<a href="./AtomTypesFingerprints.html">AtomTypesFingerprints.pm</a>,&nbsp<a href="./EStateIndiciesFingerprints.html">EStateIndiciesFingerprints.pm</a>,&nbsp
+<a href="./ExtendedConnectivityFingerprints.html">ExtendedConnectivityFingerprints.pm</a>,&nbsp<a href="./MACCSKeys.html">MACCSKeys.pm</a>,&nbsp<a href="./PathLengthFingerprints.html">PathLengthFingerprints.pm</a>,&nbsp
+<a href="./TopologicalAtomPairsFingerprints.html">TopologicalAtomPairsFingerprints.pm</a>,&nbsp<a href="./TopologicalAtomTripletsFingerprints.html">TopologicalAtomTripletsFingerprints.pm</a>,&nbsp
+<a href="./TopologicalAtomTorsionsFingerprints.html">TopologicalAtomTorsionsFingerprints.pm</a>,&nbsp<a href="./TopologicalPharmacophoreAtomPairsFingerprints.html">TopologicalPharmacophoreAtomPairsFingerprints.pm</a>,&nbsp
+<a href="./TopologicalPharmacophoreAtomTripletsFingerprints.html">TopologicalPharmacophoreAtomTripletsFingerprints.pm</a>
+</p>
+<p>
+</p>
+<h2>COPYRIGHT</h2>
+<p>Copyright (C) 2015 Manish Sud. All rights reserved.</p>
+<p>This file is part of MayaChemTools.</p>
+<p>MayaChemTools is free software; you can redistribute it and/or modify it under
+the terms of the GNU Lesser General Public License as published by the Free
+Software Foundation; either version 3 of the License, or (at your option)
+any later version.</p>
+<p>&nbsp</p><p>&nbsp</p><div class="DocNav">
+<table width="100%" border=0 cellpadding=0 cellspacing=2>
+<tr align="left" valign="top"><td width="33%" align="left"><a href="./FileUtil.html" title="FileUtil.html">Previous</a>&nbsp;&nbsp;<a href="./index.html" title="Table of Contents">TOC</a>&nbsp;&nbsp;<a href="./AtomTypesFingerprints.html" title="AtomTypesFingerprints.html">Next</a></td><td width="34%" align="middle"><strong>March 29, 2015</strong></td><td width="33%" align="right"><strong>Fingerprints::AtomNeighborhoodsFingerprints.pm</strong></td></tr>
+</table>
+</div>
+<br />
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+<img src="../../images/h2o2.png">
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