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Adding some generic sum and average functions to MathUtils

This commit is contained in:
Mauricio Carneiro 2012-02-01 19:35:09 -05:00
parent e1d69e4060
commit 3dd6a1f962
1 changed files with 25 additions and 0 deletions
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25
public/java/src/org/broadinstitute/sting/utils/MathUtils.java
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@ -137,6 +137,10 @@ public class MathUtils {
return size;
}
public static double average(Collection<Integer> x) {
return (double) sum(x) / x.size();
}
public static double average(Collection<Number> numbers, boolean ignoreNan) {
if (ignoreNan) {
@ -176,6 +180,13 @@ public class MathUtils {
return s;
}
public static long sum(int[] x) {
long total = 0;
for (int v : x)
total += v;
return total;
}
/**
* Calculates the log10 cumulative sum of an array with log10 probabilities
@ -722,6 +733,13 @@ public class MathUtils {
return average(vals, vals.size());
}
public static double average(int[] x) {
int sum = 0;
for (int v : x)
sum += v;
return (double) sum / x.length;
}
public static byte average(byte[] vals) {
int sum = 0;
for (byte v : vals) {
@ -1079,6 +1097,13 @@ public class MathUtils {
return getQScoreOrderStatistic(reads, offsets, (int) Math.floor(reads.size() / 2.));
}
public static long sum(Collection<Integer> x) {
long sum = 0;
for (int v : x)
sum += v;
return sum;
}
/**
* A utility class that computes on the fly average and standard deviation for a stream of numbers.
* The number of observations does not have to be known in advance, and can be also very big (so that