# mne.transforms.Transform¶

class mne.transforms.Transform(fro, to, trans=None)[source]

A transform.

Parameters
fro

The starting coordinate frame. See notes for valid coordinate frames.

to

The ending coordinate frame. See notes for valid coordinate frames.

transarray_like, shape (4, 4) | None

The transformation matrix. If None, an identity matrix will be used.

Notes

Attributes
from_str

The “from” frame as a string.

to_str

The “to” frame as a string.

Methods

 __contains__(self, key, /) True if the dictionary has the specified key, else False. x.__getitem__(y) <==> x[y] __iter__(self, /) Implement iter(self). __len__(self, /) Return len(self). copy(self) Make a copy of the transform. fromkeys(iterable[, value]) Create a new dictionary with keys from iterable and values set to value. get(self, key[, default]) Return the value for key if key is in the dictionary, else default. If key is not found, d is returned if given, otherwise KeyError is raised 2-tuple; but raise KeyError if D is empty. save(self, fname) Save the transform as -trans.fif file. setdefault(self, key[, default]) Insert key with a value of default if key is not in the dictionary. If E is present and has a .keys() method, then does: for k in E: D[k] = E[k] If E is present and lacks a .keys() method, then does: for k, v in E: D[k] = v In either case, this is followed by: for k in F: D[k] = F[k]
__contains__(self, key, /)

True if the dictionary has the specified key, else False.

__getitem__()

x.__getitem__(y) <==> x[y]

__iter__(self, /)

Implement iter(self).

__len__(self, /)

Return len(self).

clear()
copy(self)[source]

Make a copy of the transform.

property from_str

The “from” frame as a string.

fromkeys(iterable, value=None, /)

Create a new dictionary with keys from iterable and values set to value.

get(self, key, default=None, /)

Return the value for key if key is in the dictionary, else default.

items()
keys()
pop()

If key is not found, d is returned if given, otherwise KeyError is raised

popitem()

2-tuple; but raise KeyError if D is empty.

save(self, fname)[source]

Save the transform as -trans.fif file.

Parameters
fnamestr

The name of the file, which should end in ‘-trans.fif’.

setdefault(self, key, default=None, /)

Insert key with a value of default if key is not in the dictionary.

Return the value for key if key is in the dictionary, else default.

property to_str

The “to” frame as a string.

update()

If E is present and has a .keys() method, then does: for k in E: D[k] = E[k] If E is present and lacks a .keys() method, then does: for k, v in E: D[k] = v In either case, this is followed by: for k in F: D[k] = F[k]

values()