Java Utililty Methods Mean Calculation

List of utility methods to do Mean Calculation

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Mean Calculation

Description

The list of methods to do Mean Calculation are organized into topic(s).

Method

double calculateMean(double[] values)
calculate Mean

return calculateSum(values) / (double) values.length;

float calculateMean(float[] data)
Calculates mean value of float array

float sum = 0;
for (int i = 0; i < data.length; i++) {
 sum += data[i];
return sum / data.length;

float[] calculateMeanAndStandardDeviation(float[] data)
calculate Mean And Standard Deviation

float sumMean = 0;
float sumDev = 0;
float mean, dev;
int count = 0;
for (int i = 0; i < data.length; i++) {
 sumMean += data[i];
 count++;
mean = sumMean / count;
for (int i = 0; i < data.length; i++) {
 sumDev += (mean - data[i]) * (mean - data[i]);
dev = (float) Math.sqrt(sumDev / count);
float[] out = new float[2];
out[0] = mean;
out[1] = dev;
return out;

float[] calculateMeanAndStandardDeviationIgnoreNegatives(float[] data)
All negative values in array are ignored

float sumMean = 0;
float sumDev = 0;
float mean, dev;
int count = 0;
for (int i = 0; i < data.length; i++) {
 if (data[i] > 0) {
 sumMean += data[i];
 count++;
...

float[][] calculateMeanAndStandardDeviationVectors(float[][] vectors)
calculate Mean And Standard Deviation Vectors

float[][] out = new float[2][vectors[0].length];
for (int i = 0; i < vectors[0].length; i++) {
 float[] inputVector = new float[vectors.length];
 for (int j = 0; j < inputVector.length; j++) {
 inputVector[j] = vectors[j][i];
 float[] data = calculateMeanAndStandardDeviation(inputVector);
 out[0][i] = data[0];
...

int calculateMeanLevel(float[] distribution, int mid, int oldMid, float difference)
calculate Mean Level

return calculateMeanLevel(distribution, mid);

String calculateMeanSD(double[] d)
Calculate the mean and standard deviation for an array.

double sum = 0;
for (int i = 0; i < d.length; i++) {
 sum += d[i];
double mean = sum / d.length;
for (int i = 0; i < d.length; i++) {
 sum += Math.pow(d[i] - mean, 2);
double sd = Math.sqrt(mean / d.length);
StringBuilder result = new StringBuilder();
result.append("[mean=");
result.append(mean);
result.append(",sd=");
result.append(sd);
result.append("]");
return result.toString();