checking {SAFD} | R Documentation |
The function checks if the input data is of the correct form of a polygonal fuzzy number, i.e. a dataframe with the columns "x" and "alpha" fulfilling the following conditions: (1) alpha-values have to be in [0,1] with the minimum alpha-level being 0 and maximum being 1, (2) the x-values have to be non-decreasing, (3) the alpha-levels have to increase from 0 to 1 and afterwards decrease from 1 to 0 in the same way (i.e. the alpha-column consists of an increasing vector from 0 to 1 plus the same vector in decreasing order). As a consequence the dataframe always has an even number of rows, see examples. The function is used internally in almost all the other functions to do a preliminary checking if the input data is of the correct form.
checking(X, com = 1)
X |
...can be any data frame. |
com |
...numeric, if com =1 then, in case of an error, a comment is printed. By default com =1.
|
See examples
The function returns the value 1 if the input fulfills all conditions, if not, 0 is returned.
In case you find (almost surely existing) bugs or have recommendations for improving the functions comments are welcome to the above mentioned mail addresses.
Wolfgang Trutschnig <wolfgang.trutschnig@softcomputing.es>, Asun Lubiano <lubiano@uniovi.es>
See Also as checking2
, translator
data(XX) checking(XX[[1]],1) # X<-data.frame(cbind(y=c(-2,-0.75,-0.25,0.5,1),alpha=c(0,0.6,0.9,0.9,0))) checking(X) # X<-data.frame(cbind(x=c(-2,-0.75,-0.25,0.5,1),alpha=c(0,0.6,0.9,0.9,0))) checking(X) # X<-data.frame(cbind(x=c(-2,-0.75,-0.25,-0.5,1),alpha=c(0,0.6,1,1,0))) checking(X) # X<-data.frame(cbind(x=c(-2,-0.75,-0.25,0.5,1),alpha=c(0.3,0,1,0,0.3))) checking(X) # Y<-data.frame(cbind(x=c(-2,-0.75,-0.25,0.5,1),alpha=c(0,0.3,1,0,0.3))) checking(Y) # Z<-data.frame(cbind(x=c(-2,-0.75,-0.25,0.5,1),alpha=c(0,0.6,1,1,0))) checking(Z) # U<-data.frame(cbind(x=c(-1,0,1),alpha=c(0,1,0))) a<-checking(U,)