Jesus Fausto / wheelchaircontrol1

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Dependencies:   QEI2 chair_BNO055 PID Watchdog VL53L1X_Filter ros_lib_kinetic

Dependents:   wheelchairControlSumer2019

Statistics/statistics.cpp@30:b24d73663499, 2020-06-03 (annotated)

Committer:
jvfausto
Date:
Wed Jun 03 20:25:18 2020 +0000
Revision:
30:b24d73663499
Parent:
28:6d6bd8ad04dc 
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jvfausto 28:6d6bd8ad04dc 1
jvfausto 27:da718b990837 2 #include "statistics.h"
jvfausto 27:da718b990837 3 #include "mbed.h"
jvfausto 27:da718b990837 4
jvfausto 28:6d6bd8ad04dc 5 /**************************************************************************
jvfausto 28:6d6bd8ad04dc 6 * This function initializes the private members of the class Statistics *
jvfausto 28:6d6bd8ad04dc 7 **************************************************************************/
jvfausto 28:6d6bd8ad04dc 8 statistics::statistics(int* Input, int dataLengthIn, int firstDataPointIn){
jvfausto 27:da718b990837 9 data = Input;
jvfausto 27:da718b990837 10 dataLength = dataLengthIn;
jvfausto 28:6d6bd8ad04dc 11 firstDataPoint = firstDataPointIn;
jvfausto 27:da718b990837 12 }
jvfausto 28:6d6bd8ad04dc 13
jvfausto 28:6d6bd8ad04dc 14 /**************************************************************************
jvfausto 28:6d6bd8ad04dc 15 * This function returns the mean(average) of an array. *
jvfausto 28:6d6bd8ad04dc 16 **************************************************************************/
jvfausto 27:da718b990837 17 double statistics::mean(){
jvfausto 27:da718b990837 18 double sum;
jvfausto 28:6d6bd8ad04dc 19 for(int i = firstDataPoint; i < (firstDataPoint + dataLength); ++i)
jvfausto 27:da718b990837 20 {
jvfausto 27:da718b990837 21 sum += data[i];
jvfausto 27:da718b990837 22 }
jvfausto 27:da718b990837 23
jvfausto 27:da718b990837 24 double average = sum/dataLength;
jvfausto 27:da718b990837 25 return average;
jvfausto 27:da718b990837 26 }
jvfausto 28:6d6bd8ad04dc 27
jvfausto 28:6d6bd8ad04dc 28 /**************************************************************************
jvfausto 28:6d6bd8ad04dc 29 * This function returns the standard deviation of an array. This is *
jvfausto 28:6d6bd8ad04dc 30 * used to determine whether the data is valid or not. *
jvfausto 28:6d6bd8ad04dc 31 **************************************************************************/
jvfausto 27:da718b990837 32 double statistics::stdev(){
jvfausto 28:6d6bd8ad04dc 33 double sum = 0.0, mean, standardDeviation = 0.0;
jvfausto 28:6d6bd8ad04dc 34 printf("The length of the array is %d\n", dataLength);
jvfausto 28:6d6bd8ad04dc 35 //double num = (pow(2.0,2.0));
jvfausto 28:6d6bd8ad04dc 36 //printf("2^2 is %f\n", num);
jvfausto 28:6d6bd8ad04dc 37 //int i;
jvfausto 27:da718b990837 38
jvfausto 28:6d6bd8ad04dc 39 for(int i = firstDataPoint; i < (firstDataPoint + dataLength); ++i)
jvfausto 27:da718b990837 40 {
jvfausto 27:da718b990837 41 sum += data[i];
jvfausto 28:6d6bd8ad04dc 42 printf("%d\n", data[i]);
jvfausto 27:da718b990837 43 }
jvfausto 27:da718b990837 44
jvfausto 27:da718b990837 45 mean = sum/dataLength;
jvfausto 27:da718b990837 46
jvfausto 28:6d6bd8ad04dc 47 for(int i = firstDataPoint; i < (firstDataPoint + dataLength); ++i) {
jvfausto 28:6d6bd8ad04dc 48 //standardDeviation += pow(data[i] - mean, 2);
jvfausto 28:6d6bd8ad04dc 49 standardDeviation += (data[i] - mean)*(data[i] - mean);
jvfausto 28:6d6bd8ad04dc 50 }
jvfausto 27:da718b990837 51
jvfausto 27:da718b990837 52 return sqrt(standardDeviation / dataLength);
jvfausto 28:6d6bd8ad04dc 53 }