Nothing
FKM.pf <- function (X, k, b, RS, stand, startU, index,alpha,conv, maxit, seed = NULL)
{
if (missing(X))
stop("The data set must be given")
if (is.null(X))
stop("The data set X is empty")
X=data.matrix(X)
n=nrow(X)
p=ncol(X)
if(p==1){
stop("Dataset X must contain more than one dimension")
}
if (is.null(rownames(X)))
rn=paste("Obj",1:n,sep=" ")
else
rn=rownames(X)
if (is.null(colnames(X)))
cn=paste("Var",1:p,sep=" ")
else
cn=colnames(X)
if (any(is.na(X)))
stop("The data set X must not contain NA values")
if (!is.numeric(X))
stop("The data set X is not a numeric data.frame or matrix")
if ((missing(startU)) || (is.null(startU)))
{
check=1
checkMiss = missing(k) || is.null(k) || !is.numeric(k)
if (checkMiss)
{
k= 2:6
cat("The default value k=2:6 has been set ",fill=TRUE)
}
nk <- length(k)
if(nk != 1){
if(!checkMiss){
checkK = any(k <= 1) | any((k-as.integer(k)) != 0)
if(checkK)
{
k = 2:6
nk <- length(k)
cat("The number of clusters k must be greter than 1, integer and numeric: the default value k=2:6 will be used ",fill=TRUE)
}else{
k <- sort(unique(k))
nk <- length(k)
}
}
if (missing(index))
{
index = "SIL.F"
cat("The default index SIL.F has been set ",fill=TRUE)
}else{
if(length(index) != 1)
{
index = "SIL.F"
cat("The index must be a single value: SIL.F will be used ",fill=TRUE)
}else{
if(all(index!=c("PC","PE","MPC","SIL","SIL.F","XB"))){
index = "SIL.F"
cat("No match found for the index name: SIL.F will be used ", fill = TRUE)
}
}
}
if(index == "SIL.F"){
if (missing(alpha))
{
alpha=1
cat("The default value alpha=1 has been set for computing SIL.F ",fill=TRUE)
}else{
if (!is.numeric(alpha))
{
alpha=1
cat("The weighting coefficient alpha is not numeric: the default value alpha=1 will be used for computing SIL.F ",fill=TRUE)
}
if (alpha<0)
{
alpha=1
cat("The number of clusters k must be non negative: the value alpha=1 will be used for computing SIL.F ",fill=TRUE)
}
}
}else{
alpha = 1
}
}else{
nk <- 1
if (missing(index))
{
index = "SIL.F"
}else{
if(length(index) != 1)
{
index = "SIL.F"
cat("The index must be a single value: SIL.F will be used ",fill=TRUE)
}else{
if(!any(index==c("PC","PE","MPC","SIL","SIL.F","XB"))){
index = "SIL.F"
cat("No match found for the index name: SIL.F will be used ", fill = TRUE)
}
}
}
if(index == "SIL.F"){
if (missing(alpha))
{
alpha=1
}else{
if (!is.numeric(alpha))
{
alpha=1
cat("The weighting coefficient alpha is not numeric: the default value alpha=1 will be used for computing SIL.F ",fill=TRUE)
}
if (alpha<0)
{
alpha=1
cat("The number of clusters k must be non negative: the value alpha=1 will be used for computing SIL.F ",fill=TRUE)
}
}
}else{
alpha = 1
}
if (!is.numeric(k))
{
k=2
cat("The number of clusters k is not numeric: the default value k=2 will be used ",fill=TRUE)
}
if ((k>ceiling(n/2)) || (k<2))
{
k=2
cat("The number of clusters k must be an integer in {2, 3, ..., ceiling(n/2)}: the default value k=2 will be used ",fill=TRUE)
}
if (k%%ceiling(k)>0)
{
k=ceiling(k)
cat("The number of clusters k must be an integer in {2, 3, ..., ceiling(nrow(X)/2)}: the value ceiling(k) will be used ",fill=TRUE)
}
}
}else
{
startU=as.matrix(startU)
ns=nrow(startU)
k=ncol(startU)
check=0
nk = 1
if (any(is.na(startU)))
{
k=2
cat("The rational start must not contain NA values: the default value k=2 and a random start will be used ",fill=TRUE)
check=1
}
if (!is.numeric(startU))
{
k=2
cat("The rational start is not a numeric data.frame or matrix: the default value k=2 and a random start will be used ",fill=TRUE)
check=1
}
if ((k>ceiling(n/2)) || (k<2))
{
k=2
cat("The number of clusters k must be an integer in {2, 3, ..., ceiling(n/2)}: the default value k=2 and a random start will be used ",fill=TRUE)
check=1
}
if ((ns!=n) && (check=0))
{
cat("The number of rows of startU is different from that of X: k=ncol(startU) and a random start will be used ",fill=TRUE)
check=1
}
if (any(apply(startU,1,sum)!=1))
{
startU=startU/apply(startU,1,sum)
cat("The sums of the rows of startU must be equal to 1: the rows of startU will be normalized to unit row-wise sum ",fill=TRUE)
}
if (missing(index))
{
index = "SIL.F"
}else{
if(length(index) != 1)
{
index = "SIL.F"
cat("The index must be a single value: SIL.F will be used ",fill=TRUE)
}else{
if(!any(index==c("PC","PE","MPC","SIL","SIL.F","XB"))){
index = "SIL.F"
cat("No match found for the index name: SIL.F will be used ", fill = TRUE)
}
}
}
if(index == "SIL.F"){
if (missing(alpha))
{
alpha=1
}else{
if (!is.numeric(alpha))
{
alpha=1
cat("The weighting coefficient alpha is not numeric: the default value alpha=1 will be used for computing SIL.F ",fill=TRUE)
}
if (alpha<0)
{
alpha=1
cat("The number of clusters k must be non negative: the value alpha=1 will be used for computing SIL.F ",fill=TRUE)
}
}
}else{
alpha = 1
}
}
if (missing(b))
{
b=0.5
}
if(length(b) != 1){
b = 0.5
cat("The parameter of the polynomial fuzzifier beta must be a single value: the default value beta=0.5 will be used",fill=TRUE)
}
if (!is.numeric(b))
{
b=0.5
cat("The parameter of the polynomial fuzzifier beta is not numeric: the default value beta=0.5 will be used ",fill=TRUE)
}
if ((b>1) || (b<0))
{
b=0.5
cat("The parameter of the polynomial fuzzifier beta must be in [0,1]: the default value beta=0.5 will be used ",fill=TRUE)
}
if (missing(RS))
{
RS=1
}
if (!is.numeric(RS))
{
cat("The number of starts RS is not numeric: the default value RS=1 will be used ",fill=TRUE)
RS=1
}
if (RS<1)
{
cat("The number of starts RS must be an integer >=1: the default value RS=1 will be used ",fill=TRUE)
RS=1
}
if (RS%%ceiling(RS)>0)
{
cat("The number of starts RS must be an integer >=1: the value ceiling(RS) will be used ",fill=TRUE)
RS=ceiling(RS)
}
if (missing(conv))
conv=1e-9
if (conv<=0)
{
cat("The convergence criterion conv must be a (small) value >0: the default value conv=1e-9 will be used ",fill=TRUE)
conv=1e-9
}
if (!is.numeric(conv))
{
cat("The convergence criterion conv is not numeric: the default value conv=1e-9 will be used ",fill=TRUE)
conv=1e-9
}
if (missing(maxit))
maxit=1e+6
if (!is.numeric(maxit))
{
cat("The maximum number of iterations maxit is not numeric: the default value maxit=1e+6 will be used ",fill=TRUE)
maxit=1e+6
}
if (maxit<=0)
{
cat("The maximum number of iterations maxit must be an integer >0: the default value maxit=1e+6 will be used ",fill=TRUE)
maxit=1e+6
}
if (maxit%%ceiling(maxit)>0)
{
cat("The maximum number of iterations maxit must be an integer >0: the value ceiling(maxit) will be used ",fill=TRUE)
maxit=ceiling(maxit)
}
if(!is.null(seed))
{
if (!is.numeric(seed))
{
cat("The seed value is not numeric: set.seed(NULL) will be used ",fill=TRUE)
set.seed(NULL)
}else{
set.seed(seed)
}
}
Xraw=X
rownames(Xraw)=rownames(X)
colnames(Xraw)=colnames(X)
if (missing(stand))
stand=0
if (!is.numeric(stand))
stand=0
if (stand==1)
X=scale(X,center=TRUE,scale=TRUE)[,]
crit.f <- rep(NA,nk)
crit = 0
for(c in 1:nk)
{
if ((check!=1))
{
main.temp <- mainFKM_pf_U(data = X, b = b, n = n, p = p, k = k[c],index = index,alpha = alpha ,U = startU, conv = conv, maxit = maxit)
}else{
main.temp <- mainFKM_pf(data = X, b = b, n = n, p = p, k = k[c], index = index,alpha = alpha,rs = RS, conv = conv, maxit = maxit)
}
crit.temp = main.temp$index_max
crit.f[c] = main.temp$index
if(c == 1 | crit < crit.temp)
{
main = main.temp
crit = crit.temp
}
}
value = as.vector(main$value)
it = as.vector(main$iter)
U.opt = main$U
H.opt = main$H
names(crit.f) = paste(index," ","k=",k,sep="")
k = main$k
rownames(H.opt)=paste("Clus",1:k,sep=" ")
colnames(H.opt)=cn
rownames(U.opt)=rn
colnames(U.opt)=rownames(H.opt)
names(value)=paste("Start",1:RS,sep=" ")
names(it)=names(value)
names(k)=c("Number of clusters")
names(b)=c("Parameter of polynomial fuzzifier")
if (stand!=1)
stand=0
names(stand)=c("Standardization (1=Yes, 0=No)")
clus=cl.memb(U.opt)
out = list( U=U.opt,
H=H.opt,
F=NULL,
clus=clus,
medoid=NULL,
value=value,
criterion = crit.f,
iter=it,
k=k,
m=NULL,
ent=NULL,
b=b,
vp=NULL,
delta=NULL,
stand=stand,
Xca=X,
X=Xraw,
D=NULL,
call=match.call())
class(out)=c("fclust")
return(out)
}
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