Mercurial > repos > miller-lab > genome_diversity
annotate genome_diversity/src/filter_snps.c @ 24:248b06e86022
Added gd_genotype datatype. Modified tools to support new datatype.
author | Richard Burhans <burhans@bx.psu.edu> |
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date | Tue, 28 May 2013 16:24:19 -0400 |
parents | 95a05c1ef5d5 |
children | 8997f2ca8c7a |
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1 /* pop -- add four columns (allele counts, genotype, maximum quality) for a |
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2 * specified population to a Galaxy SNP table, or enforce bounds |
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3 * |
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4 * argv[1] = file containing a Galaxy table |
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5 * argv[2] = lower bound on total coverage (> 0 means interpret as percentage) |
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6 * argv[3] = upper bound on total coverae (> 0 means interpret as percentage) |
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7 * argv[4] = lower bound on individual coverage |
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8 * argv[5] = lower bound on individual quality value |
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9 * argv[6] ... are the starting columns (base-1) for the chosen individuals |
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10 |
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11 What it does on Galaxy |
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12 The user specifies that some of the individuals in a gd_snp dataset form a "population", by supplying a list that has been previously created using the Specify Individuals tool. SNPs are then discarded if their total coverage for the population is too low or too high, or if their coverage or quality score for any individual in the population is too low. |
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13 |
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14 */ |
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15 |
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16 #include "lib.h" |
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17 |
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18 // most characters allowed in a row of the table |
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19 #define MOST 50000 |
22
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20 |
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21 char buf[MOST]; |
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22 |
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23 // column for the relevant individuals/groups |
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24 int col[MOST], *T; |
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25 int nI, lo, hi, X[MOST]; |
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26 |
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27 void get_X() { |
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28 char *p, *z = "\t\n", trash[MOST]; |
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29 int i; |
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30 |
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31 strcpy(trash, buf); |
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32 // set X[i] = atoi(i-th word of s), i is base 0 |
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33 for (i = 1, p = strtok(trash, z); p != NULL; |
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34 ++i, p = strtok(NULL, z)) |
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35 X[i] = atoi(p); |
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36 } |
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37 |
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38 int compar(int *a, int *b) { |
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39 if (*a < *b) |
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40 return -1; |
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41 if (*a > *b) |
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42 return 1; |
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43 return 0; |
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44 } |
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45 |
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46 void find_lo(char *filename) { |
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47 FILE *fp = ckopen(filename, "r"); |
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48 int n, m, i, k; |
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49 |
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50 for (n = 0; fgets(buf, MOST, fp); ++n) |
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51 ; |
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52 T = ckalloc(n*sizeof(int)); |
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53 rewind(fp); |
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54 for (k = 0; fgets(buf, MOST, fp); ++k) { |
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55 get_X(); |
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56 for (i = T[k] = 0; i < nI; ++i) { |
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57 m = col[i]; |
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58 T[k] += (X[m]+X[m+1]); |
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59 } |
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60 } |
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61 qsort((void *)T, (size_t)n, sizeof(int), (const void *)compar); |
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62 if (lo < 0) { |
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63 lo = -lo; |
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64 if (lo > 100) |
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65 fatal("cannot have low > 100%"); |
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66 lo = T[(n*lo)/100]; |
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67 } |
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68 if (hi < 0) { |
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69 hi = -hi; |
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70 if (hi > 100) |
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71 fatal("cannot have high > 100%"); |
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72 hi = T[(n*hi)/100]; |
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73 } |
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74 free(T); |
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75 fclose(fp); |
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76 } |
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77 |
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78 int main(int argc, char **argv) { |
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79 FILE *fp; |
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80 char *p; |
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81 int m, i, A, B, G, Q, indiv, qual, g, q; |
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82 |
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83 if (argc < 3) |
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84 fatalf("args: SNP-table low high col1 col2 ..."); |
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85 |
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86 for (i = 6, nI = 0; i < argc; ++i, ++nI) |
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87 col[nI] = atoi(argv[i]); |
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88 lo = atoi(argv[2]); |
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89 hi = atoi(argv[3]); |
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90 if (hi == 0) |
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91 hi = 100000000; |
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92 if (lo < 0 || hi < 0) |
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93 find_lo(argv[1]); |
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94 indiv = atoi(argv[4]); |
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95 qual = atoi(argv[5]); |
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96 if (indiv < 0 || qual < 0) |
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97 fatalf("percentiles not implemented for individuals"); |
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98 |
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99 fp = ckopen(argv[1], "r"); |
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100 while (fgets(buf, MOST, fp)) { |
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101 if (buf[0] == '#') |
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102 continue; |
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103 get_X(); |
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104 for (i = A = B = Q = 0, G = -1; i < nI; ++i) { |
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105 m = col[i]; |
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106 if (X[m]+X[m+1] < indiv || (q = X[m+3]) < qual) |
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107 break; |
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108 A += X[m]; |
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109 B += X[m+1]; |
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110 g = X[m+2]; |
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111 if (g != -1) { |
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112 if (G == -1) // first time |
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113 G = g; |
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114 else if (G != g) |
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115 G = 1; |
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116 } |
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117 Q = MAX(Q, q); |
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118 } |
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119 if (i < nI) // check bounds on the population's individuals |
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120 continue; |
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121 if (lo == -1 && hi == -1 && indiv == -1 && qual == -1) { |
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122 // add columns |
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123 if ((p = strchr(buf, '\n')) != NULL) |
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124 *p = '\0'; |
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125 printf("%s\t%d\t%d\t%d\t%d\n", buf, A, B, G, Q); |
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126 } else if (A+B >= lo && (hi == -1 || A+B <= hi)) |
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127 // coverage meets the population-level restrictions |
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128 printf("%s", buf); |
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129 } |
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130 |
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131 return 0; |
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132 } |