2 * Jalview - A Sequence Alignment Editor and Viewer
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3 * Copyright (C) 2005 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle
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5 * This program is free software; you can redistribute it and/or
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6 * modify it under the terms of the GNU General Public License
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7 * as published by the Free Software Foundation; either version 2
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8 * of the License, or (at your option) any later version.
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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15 * You should have received a copy of the GNU General Public License
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16 * along with this program; if not, write to the Free Software
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17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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19 package jalview.analysis;
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21 import jalview.datamodel.*;
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27 * Calculates conservation values for a given set of sequences
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30 * @version $Revision$
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32 public class Conservation
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37 Vector seqNums; // vector of int vectors where first is sequence checksum
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38 int maxLength = 0; // used by quality calcs
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39 boolean seqNumsChanged = false; // updated after any change via calcSeqNum;
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40 Vector total = new Vector();
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42 /** Stores calculated quality values */
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43 public Vector quality;
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45 /** Stores maximum and minimum values of quality values */
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46 public Double[] qualityRange = new Double[2];
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47 String consString = "";
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48 Sequence consSequence;
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55 * Creates a new Conservation object.
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57 * @param name Name of conservation
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58 * @param propHash DOCUMENT ME!
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59 * @param threshold to count the residues in residueHash(). commonly used value is 3
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60 * @param sequences sequences to be used in calculation
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61 * @param start start residue position
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62 * @param end end residue position
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64 public Conservation(String name, Hashtable propHash, int threshold,
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65 Vector sequences, int start, int end)
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68 this.propHash = propHash;
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69 this.threshold = threshold;
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70 this.sequences = sequences;
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73 seqNums = new Vector(sequences.size());
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80 private void calcSeqNums()
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82 int i=0, iSize=sequences.size();
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83 for (i=0; i < iSize; i++)
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92 * @param i DOCUMENT ME!
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94 private void calcSeqNum(int i)
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96 String sq = null; // for dumb jbuilder not-inited exception warning
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99 if ((i > -1) && (i < sequences.size()))
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101 sq = ((SequenceI) sequences.elementAt(i)).getSequence();
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103 if (seqNums.size() <= i)
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105 seqNums.addElement(new int[sq.length() + 1]);
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108 if (sq.hashCode() != ((int[]) seqNums.elementAt(i))[0])
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112 seqNumsChanged = true;
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113 sq = ((SequenceI) sequences.elementAt(i)).getSequence();
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116 if (maxLength < len)
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121 sqnum = new int[len + 1]; // better to always make a new array - sequence can change its length
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122 sqnum[0] = sq.hashCode();
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124 for (j = 1; j <= len; j++)
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126 sqnum[j] = ((Integer) jalview.schemes.ResidueProperties.aaHash.get(String.valueOf(
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127 sq.charAt(j - 1)))).intValue(); // yuk - JBPNote - case taken care of in aaHash
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130 seqNums.setElementAt(sqnum, i);
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135 // JBPNote INFO level debug
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136 System.err.println(
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137 "ERROR: calcSeqNum called with out of range sequence index for Alignment\n");
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142 * Calculates the conservation values for given set of sequences
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144 public void calculate()
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146 Hashtable resultHash, residueHash, ht;
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147 int count, thresh, j, jSize = sequences.size();
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148 String type, res=null;
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149 SequenceI sequence;
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151 Enumeration enumeration, enumeration2;
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153 for (int i = start; i <= end; i++)
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155 resultHash = new Hashtable();
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156 residueHash = new Hashtable();
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158 for (j = 0; j < jSize; j++)
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160 // JBPNote - have to make sure elements of the sequences vector
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161 // are tested like this everywhere...
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162 sequence = (Sequence) sequences.elementAt(j);
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164 if (sequence.getLength() > i)
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166 c = sequence.getCharAt(i);
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168 // No need to check if its a '-'
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169 if(c == '.' || c==' ')
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172 if ('a' <= c && c <= 'z')
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174 // TO UPPERCASE !!!
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175 //Faster than toUpperCase
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179 res = String.valueOf( c );
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182 if (residueHash.containsKey(res))
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184 count = ((Integer) residueHash.get(res)).intValue();
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186 residueHash.put(res, new Integer(count));
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190 residueHash.put(res, new Integer(1));
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195 if (residueHash.containsKey("-"))
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197 count = ((Integer) residueHash.get("-")).intValue();
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199 residueHash.put("-", new Integer(count));
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203 residueHash.put("-", new Integer(1));
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208 //What is the count threshold to count the residues in residueHash()
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209 thresh = (threshold * (sequences.size())) / 100;
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211 //loop over all the found residues
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212 enumeration = residueHash.keys();
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214 while (enumeration.hasMoreElements())
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216 res = (String) enumeration.nextElement();
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218 if (((Integer) residueHash.get(res)).intValue() > thresh)
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220 //Now loop over the properties
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221 enumeration2 = propHash.keys();
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223 while (enumeration2.hasMoreElements())
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225 type = (String) enumeration2.nextElement();
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226 ht = (Hashtable) propHash.get(type);
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228 //Have we ticked this before?
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229 if (!resultHash.containsKey(type))
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231 if (ht.containsKey(res))
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233 resultHash.put(type, ht.get(res));
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237 resultHash.put(type, ht.get("-"));
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240 else if (((Integer) resultHash.get(type)).equals(
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241 (Integer) ht.get(res)) == false)
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243 resultHash.put(type, new Integer(-1));
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249 total.addElement(resultHash);
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256 * returns gap count in int[0], and conserved residue count in int[1]
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258 public int[] countConsNGaps(int j)
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263 int[] r = new int[2];
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265 int i, iSize = sequences.size();
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268 for (i = 0; i < iSize; i++)
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270 if (j >= ((Sequence) sequences.elementAt(i)).getLength())
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276 c = ((Sequence) sequences.elementAt(i)).getCharAt(j); // gaps do not have upper/lower case
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278 if (jalview.util.Comparison.isGap((c)))
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298 r[0] = (nres == cons) ? 1 : 0;
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305 * Calculates the conservation sequence
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307 * @param consflag if true, poitiveve conservation; false calculates negative conservation
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308 * @param percentageGaps commonly used value is 25
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310 public void verdict(boolean consflag, float percentageGaps)
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312 StringBuffer consString = new StringBuffer();
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316 int totGaps, count;
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318 Hashtable resultHash ;
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319 Enumeration enumeration;
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322 for (int i = start; i <= end; i++)
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324 gapcons = countConsNGaps(i);
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325 totGaps = gapcons[1];
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326 pgaps = ((float) totGaps * 100) / (float) sequences.size();
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328 if (percentageGaps > pgaps)
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330 resultHash = (Hashtable) total.elementAt(i - start);
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332 //Now find the verdict
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334 enumeration = resultHash.keys();
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336 while (enumeration.hasMoreElements())
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338 type = (String) enumeration.nextElement();
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339 result = (Integer) resultHash.get(type);
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341 //Do we want to count +ve conservation or +ve and -ve cons.?
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344 if (result.intValue() == 1)
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351 if (result.intValue() != -1)
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360 consString.append(count); // Conserved props!=Identity
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364 consString.append((gapcons[0] == 1) ? "*" : "+");
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369 consString.append("-");
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373 consSequence = new Sequence(name, consString.toString(), start, end);
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379 * @return Conservation sequence
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381 public Sequence getConsSequence()
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383 return consSequence;
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386 // From Alignment.java in jalview118
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387 public void findQuality()
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389 findQuality(0, maxLength - 1);
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395 private void percentIdentity2()
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397 calcSeqNums(); // updates maxLength, too.
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399 if ((cons2 == null) || seqNumsChanged)
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401 cons2 = new int[maxLength][24];
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403 // Initialize the array
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404 for (int j = 0; j < 24; j++)
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406 for (int i = 0; i < maxLength; i++)
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415 while (j < sequences.size())
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417 sqnum = (int[]) seqNums.elementAt(j);
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419 for (int i = 1; i < sqnum.length; i++)
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421 cons2[i - 1][sqnum[i]]++;
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424 for (int i = sqnum.length - 1; i < maxLength; i++)
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426 cons2[i][23]++; // gap count
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434 /* for (int i=start; i <= end; i++) {
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439 for (int j=0;j<24;j++) {
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440 if (cons2[i][j] > max) {
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452 * Calculates the quality of the set of sequences
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454 * @param start Start residue
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455 * @param end End residue
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457 public void findQuality(int start, int end)
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459 quality = new Vector();
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461 double max = -10000;
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462 int[][] BLOSUM62 = jalview.schemes.ResidueProperties.getBLOSUM62();
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464 //Loop over columns // JBPNote Profiling info
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465 // long ts = System.currentTimeMillis();
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466 //long te = System.currentTimeMillis();
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467 percentIdentity2();
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469 int size = seqNums.size();
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470 int[] lengths = new int[size];
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471 double tot, bigtot, sr, tmp;
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473 int l, j, i, ii, seqNum;
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475 for (l = 0; l < size; l++)
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476 lengths[l] = ((int[]) seqNums.elementAt(l)).length - 1;
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479 for (j = start; j <= end; j++)
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483 // First Xr = depends on column only
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484 x = new double[24];
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486 for (ii = 0; ii < 24; ii++)
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492 for (int i2 = 0; i2 < 24; i2++)
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494 x[ii] += (((double) cons2[j][i2] * BLOSUM62[ii][i2]) +
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498 catch (Exception e)
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500 System.err.println("Exception during quality calculation.");
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501 e.printStackTrace();
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504 //System.out.println("X " + ii + " " + x[ii]);
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507 //System.out.println("X " + ii + " " + x[ii]);
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510 // Now calculate D for each position and sum
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511 for (int k = 0; k < size; k++)
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514 xx = new double[24];
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515 seqNum = (j < lengths[k])
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516 ? ((int[]) seqNums.elementAt(k))[j + 1] : 23; // Sequence, or gap at the end
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518 // This is a loop over r
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519 for (i = 0; i < 23; i++)
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525 sr = (double) BLOSUM62[i][seqNum] + 4;
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527 catch (Exception e)
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529 System.out.println("Exception in sr: " + e);
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530 e.printStackTrace();
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533 //Calculate X with another loop over residues
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534 // System.out.println("Xi " + i + " " + x[i] + " " + sr);
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537 tot += (xx[i] * xx[i]);
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540 bigtot += Math.sqrt(tot);
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543 // This is the quality for one column
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549 // bigtot = bigtot * (size-cons2[j][23])/size;
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550 quality.addElement(new Double(bigtot));
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553 // Need to normalize by gaps
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556 double newmax = -10000;
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558 for (j = start; j <= end; j++)
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560 tmp = ((Double) quality.elementAt(j)).doubleValue();
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561 tmp = ((max - tmp) * (size - cons2[j][23])) / size;
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563 // System.out.println(tmp+ " " + j);
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564 quality.setElementAt(new Double(tmp), j);
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572 // System.out.println("Quality " + s);
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573 qualityRange[0] = new Double(0);
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574 qualityRange[1] = new Double(newmax);
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