Tanish Jain / wheelchaircontrol

a

Dependencies:   QEI2 chair_BNO055 PID Watchdog VL53L1X_Filter ros_lib_kinetic

Dependents:   wheelchairControlSumer19 Version1-0

Statistics/statistics.cpp@34:b89967adc86c, 2019-07-02 (annotated)

Committer:
t1jain
Date:
Tue Jul 02 17:49:18 2019 +0000
Revision:
34:b89967adc86c
Parent:
31:06f2362caf12 
Cloned as Version 1.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
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 **************************************************************************/
t1jain 31:06f2362caf12 8 statistics::statistics(int* Input, double 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 }
t1jain 31:06f2362caf12 23 //printf("sum %f, data length %f\r\n", sum, dataLength);
t1jain 31:06f2362caf12 24 wait(.001);
jvfausto 27:da718b990837 25 double average = sum/dataLength;
jvfausto 27:da718b990837 26 return average;
jvfausto 27:da718b990837 27 }
jvfausto 28:6d6bd8ad04dc 28
jvfausto 28:6d6bd8ad04dc 29 /**************************************************************************
jvfausto 28:6d6bd8ad04dc 30 * This function returns the standard deviation of an array. This is *
jvfausto 28:6d6bd8ad04dc 31 * used to determine whether the data is valid or not. *
jvfausto 28:6d6bd8ad04dc 32 **************************************************************************/
jvfausto 27:da718b990837 33 double statistics::stdev(){
jvfausto 28:6d6bd8ad04dc 34 double sum = 0.0, mean, standardDeviation = 0.0;
t1jain 31:06f2362caf12 35 //printf("The length of the array is %d\n", dataLength);
jvfausto 28:6d6bd8ad04dc 36 //double num = (pow(2.0,2.0));
jvfausto 28:6d6bd8ad04dc 37 //printf("2^2 is %f\n", num);
jvfausto 28:6d6bd8ad04dc 38 //int i;
jvfausto 27:da718b990837 39
jvfausto 28:6d6bd8ad04dc 40 for(int i = firstDataPoint; i < (firstDataPoint + dataLength); ++i)
jvfausto 27:da718b990837 41 {
jvfausto 27:da718b990837 42 sum += data[i];
t1jain 30:c25b2556e84d 43 //printf("%d\n", data[i]);
jvfausto 27:da718b990837 44 }
jvfausto 27:da718b990837 45
jvfausto 27:da718b990837 46 mean = sum/dataLength;
jvfausto 27:da718b990837 47
jvfausto 28:6d6bd8ad04dc 48 for(int i = firstDataPoint; i < (firstDataPoint + dataLength); ++i) {
jvfausto 28:6d6bd8ad04dc 49 //standardDeviation += pow(data[i] - mean, 2);
jvfausto 28:6d6bd8ad04dc 50 standardDeviation += (data[i] - mean)*(data[i] - mean);
jvfausto 28:6d6bd8ad04dc 51 }
jvfausto 27:da718b990837 52
jvfausto 27:da718b990837 53 return sqrt(standardDeviation / dataLength);
jvfausto 28:6d6bd8ad04dc 54 }