# 2.1.17.8.22.3 y75

## Description

Get the 75th percentile of vector.

## Syntax

double y75( vector & vec )

## Parameters

vec
[input] Origin C vector object

## Return

Returns the 75th percentile of vector.

## Examples

EX1

// This is a self contained sample program for the function y75,
// Its sample data is created at the beginning of the program.
// To run the program, enter the following command in the Script window:
//   y75_ex1
// It returns like:
//   75th Percentile of Book3_B = 0.47304
//
void y75_ex1()
{
Worksheet wks;
wks.Create();
Dataset myDs(wks, 1);
String strDsName = myDs.GetName();

//******* Create sample data *****************
myDs.SetSize(7);
myDs=0.3;
myDs=0.097;
myDs=0.41256;
myDs=0.24909;
myDs=0.47304;
myDs=0.2476;
myDs=0.64529;
myDs.Sort();
//******** End of Sample Data Creation *******

vector vVal = myDs;
double dP75 = y75(vVal);  // Demonstration of y75

printf("75th Percentile of %s = %g\n", strDsName, dP75);
}

## Remark

Let the $i\,$th percentile be y, set $p=i/100\,$ , n is the number of data points, and let $np=(j+g) \,$

where j is the integer part of np, and g is the fractional part of np, then different methods define the $i^{th}\,$ percentile, y, as described by the following. $y = \begin{cases} \frac 12(x(j)+x(j+1)),& \mbox{if }\ g=0 \\ x_(j+1),& \mbox{if }\ g>0 \end{cases}$

Get the 75th percentile of a vector(Not suppotted Dataset after version 8.0).