1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) 1999 - INRIA - Carlos Klimann
//
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution. The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
//
function [m]=meanf(val,fre,orient)
//
//This function returns in scalar m the mean of the values of a vector
//or matrix val, each counted with a frequency signaled by the
//corresponding values of the integer vector or matrix fre.
//
//For a vector or matrix val, m=meanf(val,fre) or m=meanf(val,fre,'*')
//returns in scalar m the mean of all the entries of val, each value
//counted with the multiplicity indicated by the corresponding value of
//fre.
//
//m=meanf(val,fre,'r')(or, equivalently, m=meanf(val,fre,1)) returns in
//each entry of the row vector m of type 1xsize(val,'c') the mean of
//each column of val, each value counted with the multiplicity indicated
//by the corresponding value of fre.
//
//m=meanf(val,fre,'c')(or, equivalently, m=meanf(val,fre,2)) returns in
//each entry of the column vector m of type size(val,'c')x1 the mean of
//each row of val, each value counted with the multiplicity indicated by
//the corresponding value of fre.
//
//References: Wonacott, T.H. & Wonacott, R.J.; Introductory
//Statistics, J.Wiley & Sons, 1990.
//
[lhs, rhs] = argn(0);
if rhs == 0 | rhs == 1| rhs >= 4 then
error(msprintf(gettext("%s: Wrong number of input argument: %d to %d expected.\n"),"meanf",2,3));
end
// If val is not constant, sparse, integer, hypermat
if and(type(val) <> [1 5 8]) & typeof(val) <> "hypermat" then
error(msprintf(gettext("%s: Wrong type for input argument #%d: A full or sparse matrix, or an integer matrix, or an hypermat expected.\n"),"meanf",1));
end
// If fre is not constant, sparse, integer, hypermat
if and(type(fre) <> [1 5 8]) & typeof(fre) <> "hypermat" then
error(msprintf(gettext("%s: Wrong type for input argument #%d: A full or sparse matrix, or an integer matrix, or an hypermat expected.\n"),"meanf", 2));
end
if or(size(val) <> size(fre)) & (size(val, "*") <> 1 & size(fre, "*") <> 1 & ~isempty(fre)) then
error(msprintf(gettext("%s: Wrong size for input arguments #%d and #%d: Same dimensions expected.\n"), "meanf", 1, 2));
end
if val == [] | fre == [] | and(fre == 0) then
m = %nan;
return
end
if rhs == 2 then
m=sum(val .* fre)/sum(fre);
elseif rhs==3 then
if orient=="*" then
m=sum(val .* fre)/sum(fre)
elseif orient=="r"|orient==1 then
m=sum(val .* fre,"r") ./ sum(fre,"r")
elseif orient=="c"|orient==2 then
m=sum(val .* fre,"c") ./ sum(fre,"c")
else
error(msprintf(gettext("%s: Wrong value for input argument #%d: ''%s'', ''%s'', %d or %d expected.\n"),"meanf",3,"r","c",1,2)),
end
end
endfunction
|
