# harmonise.fv

##### Make Function Tables Compatible

Convert several objects of class `"fv"`

to the same values of the function argument.

##### Usage

```
# S3 method for fv
harmonise(…, strict=FALSE)
```# S3 method for fv
harmonize(…, strict=FALSE)

##### Arguments

- …
Any number of function tables (objects of class

`"fv"`

).- strict
Logical. If

`TRUE`

, a column of data will be deleted if columns of the same name do not appear in every object.

##### Details

A function value table (object of class `"fv"`

) is
essentially a data frame giving the values of a function \(f(x)\)
(or several alternative estimates of this value)
at equally-spaced values of the function argument \(x\).

The command `harmonise`

is generic. This is the
method for objects of class `"fv"`

.

This command makes any number of `"fv"`

objects compatible,
in the loose sense that they have the same sequence of values of
\(x\). They can then be combined by `cbind.fv`

,
but not necessarily by `eval.fv`

.

All arguments `…`

must be function value tables
(objects of class `"fv"`

).
The result will be a list, of length equal to the number of
arguments `…`

, containing new versions of each of these functions,
converted to a common sequence of \(x\) values.
If the arguments were named (`name=value`

) then the return value
also carries these names.

The range of \(x\) values in the resulting functions
will be the intersection of the ranges of \(x\) values
in the original functions.
The spacing of \(x\) values in the resulting functions
will be the finest (narrowest) of the spacings of the
\(x\) values in the original functions.
Function values are interpolated using `approxfun`

.

If `strict=TRUE`

, each column of data will be retained only if
a column of the same name appears in all of the arguments `…`

.
This ensures that the resulting objects are strictly compatible
in the sense of `compatible.fv`

,
and can be combined using `eval.fv`

or `collapse.fv`

.

If `strict=FALSE`

(the default), this does not occur,
and then the resulting objects are **not** guaranteed to be compatible
in the sense of `compatible.fv`

.

##### Value

A list, of length equal to the number of arguments `…`

,
whose entries are objects of class `"fv"`

.
If the arguments were named (`name=value`

) then the return value
also carries these names.

##### See Also

##### Examples

```
# NOT RUN {
H <- harmonise(K=Kest(cells), G=Gest(cells))
H
# }
# NOT RUN {
## generates a warning about duplicated columns
try(cbind(H$K, H$G))
# }
```

*Documentation reproduced from package spatstat, version 1.57-1, License: GPL (>= 2)*