big.peaks.col: Peak search by first derivatives
In Fragman: Fragment Analysis in R

Description Usage Arguments Details Value References Examples

This function find all peaks by taking the first derivative based on 'rle' function. Is used in different Fragma functions.

1	big.peaks.col(x,tre)

`x`	A vector of heights or intensities
`tre`	A scalar value deciding when peaks will be ignored

No major details.

Retuns the biggest peaks for a vector of intensities.

out: a vector of positions where the derivative is zero and therefore a peak was found

Covarrubias-Pazaran G, Diaz-Garcia L, Schlautman B, Salazar W, Zalapa J. Fragman: An R package for fragment analysis. 2016. BMC Genetics 17(62):1-8.

Robert J. Henry. 2013. Molecular Markers in Plants. Wiley-Blackwell. ISBN 978-0-470-95951-0.

Ben Hui Liu. 1998. Statistical Genomics. CRC Press LLC. ISBN 0-8493-3166-8.

1 2	data(my.plants) big.peaks.col(my.plants [[1]][,1],100)#for any color

$pos
  [1]  767  773  778  780  791  801  803  806  809  818  829  831  834  836  840
 [16]  843  853  861  863  865  875  883  886  895  904  906  911  912  917  924
 [31]  939  944  950  959  983  996 1028 1030 1046 1079 1103 1115 1116 1130 1140
 [46] 1150 1160 1164 1174 1184 1200 1211 1223 1231 1241 1249 1264 1273 1291 1302
 [61] 1308 1314 1319 1328 1361 1368 1370 1376 1383 1395 1402 1407 1408 1415 1417
 [76] 1419 1422 1425 1443 1466 1470 1481 1483 1495 1497 1504 1512 1515 1516 1521
 [91] 1523 1546 1550 1559 1678 1691 1940 1942 1990 1999 2008 2189 2192 2195 2199
[106] 2638 2650 2661 2670 2682 2792 2796 3004 3026 3040 3051 3060 3061 3066 3068
[121] 3091 3097 3112 3123 3135 3156 3166 3175 3178 3180 3183 3185 3188 3195 3206
[136] 3213 3215 3218 3229 3240 3252 3829 3831 3833 3836 3838 3840 3848 3850 3860
[151] 3871 3882 3892 3912 3934 3947 3958 3970 3981 3994 4004 4648 4695

$hei
  [1]   306   192   301   298   315   181   184   185   162   616   115   113
 [13]   112   116   124   129   414   371   407   441   397   202   224   531
 [25]   171   159   164   164   240   410   265   732   550   470  1658  1990
 [37]  9285  9326 32608  5457  4109  2037  2037  1860  2396  2768  1018  1195
 [49]  2286  1939   937   793  1152   855  1347  1131  2522  2787   723   600
 [61]   370   625   525   470   471   336   346   262   420   277   169   271
 [73]   271   206   211   222   247   243   916   190   103   121   102   192
 [85]   197   310   138   133   133   152   161   102   118   177   102   127
 [97]   657   664   177   301   194   105   115   133   135   132   167   455
[109]   490   272   163   277   144   118   110   270   170   170   103   107
[121]   308   205  1285 22917  1305   160   234   213   180   148   144   125
[133]   115   246   293   159   186   193  1109 20563  1134   116   112   114
[145]   130   124   110   128   137   155   314   265   305   620  3407  1424
[157] 23456  1927  7556   513   174  1035   532