by column
fastq_stats.py '$input_file' '$output_file' '${input_file.extension[len( 'fastq' ):]}'
This tool creates summary statistics on a FASTQ file.
.. class:: infomark
**TIP:** This statistics report can be used as input for the **Boxplot** and **Nucleotides Distribution** tools.
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**The output file will contain the following fields:**
* column = column number (1 to 36 for a 36-cycles read Solexa file)
* count = number of bases found in this column.
* min = Lowest quality score value found in this column.
* max = Highest quality score value found in this column.
* sum = Sum of quality score values for this column.
* mean = Mean quality score value for this column.
* Q1 = 1st quartile quality score.
* med = Median quality score.
* Q3 = 3rd quartile quality score.
* IQR = Inter-Quartile range (Q3-Q1).
* lW = 'Left-Whisker' value (for boxplotting).
* rW = 'Right-Whisker' value (for boxplotting).
* outliers = Scores falling beyond the left and right whiskers (comma separated list).
* A_Count = Count of 'A' nucleotides found in this column.
* C_Count = Count of 'C' nucleotides found in this column.
* G_Count = Count of 'G' nucleotides found in this column.
* T_Count = Count of 'T' nucleotides found in this column.
* N_Count = Count of 'N' nucleotides found in this column.
* Other_Nucs = Comma separated list of other nucleotides found in this column.
* Other_Count = Comma separated count of other nucleotides found in this column.
For example::
#column count min max sum mean Q1 med Q3 IQR lW rW outliers A_Count C_Count G_Count T_Count N_Count other_bases other_base_count
1 14336356 2 33 450600675 31.4306281875 32.0 33.0 33.0 1.0 31 33 2,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30 4482314 2199633 4425957 3208745 19707
2 14336356 2 34 441135033 30.7703737965 30.0 33.0 33.0 3.0 26 34 2,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25 4419184 2170537 4627987 3118567 81
3 14336356 2 34 433659182 30.2489127642 29.0 32.0 33.0 4.0 23 34 2,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22 4310988 2941988 3437467 3645784 129
4 14336356 2 34 433635331 30.2472490917 29.0 32.0 33.0 4.0 23 34 2,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22 4110637 3007028 3671749 3546839 103
5 14336356 2 34 432498583 30.167957813 29.0 32.0 33.0 4.0 23 34 2,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22 4348275 2935903 3293025 3759029 124
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.. class:: warningmark
Adapter bases in color space reads are excluded from statistics.