# quart

computation of quartiles

### Syntax

```s = quart(x)
s = quart(x, orientation)```

### Arguments

x

real or complex vector or matrix

orientation

index of the dimension along which the quart is computed. It can be either

• a character `"*"` (default), `"r"` or `"c"`
• a positive integer: 1 or 2. 1 is equivalent to "r" and 2 is equivalent to "c".
s

real or complex scalar or vector

### Description

For a vector or a matrix x, q = quart(x) or q = quart(x, "*") returns in the vector q the quartiles of x. q = quart(x, 'r') (or, equivalently, q = quart(x, 1)) are the rowwise percentiles. It returns in each column of the matrix q the quartiles of data in the corresponding column of x.

q = quart(x, 'c') (or, equivalently, q = quart(x, 2)) are the columnwise quartiles. It returns in each row of the matrix q the quartiles of data in the corresponding row of x.

### Examples

```x=[6 7 0 7 10 4 2 2 7 1;
6 0 5 5 5 2 0 6 8 10;
8 6 4 3 5 9 8 3 4 7;
1 3 2 7 6 1 1 4 8 2;
6 3 5 1 6 5 9 9 5 5;
1 6 4 4 5 4 0 8 1 8;
7 1 3 7 8 0 2 8 10 8;
3 6 1 9 8 5 5 3 2 1;
5 7 6 2 10 8 7 4 0 8;
10 3 3 4 8 6 9 4 8 3]
q=quart(x)
q=quart(x, 'r')
q=quart(x, 'c')```

### Bibliography

Wonacott, T.H. & Wonacott, R.J.; Introductory Statistics, fifth edition, J.Wiley & Sons, 1990.

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