Fix spelling mistakes in documentation and code

CHANGES.rst

@@ -1598,7 +1598,7 @@ astropy.units
 astropy.visualization
 ^^^^^^^^^^^^^^^^^^^^^
 
-- Explicilty default to origin='lower' in WCSAxes. [#7331]
+- Explicitly default to origin='lower' in WCSAxes. [#7331]
 
 - Lists of units are now converted in the Matplotlib unit converter. This means
   that for Matplotlib versions later than 2.2, more plotting functions now work
@@ -2372,7 +2372,7 @@ astropy.table
 - Removed the deprecated functions ``join``, ``hstack``, ``vstack`` and
   ``get_groups`` from np_utils. [#5729]
 
-- Added ``name`` paramater to method ``astropy.table.Table.add_column`` and
+- Added ``name`` parameter to method ``astropy.table.Table.add_column`` and
   ``names`` parameter to method ``astropy.table.Table.add_columns``, to
   provide the flexibility to add unnamed columns, mixin objects and also to
   specify explicit names. Default names will be used if not
@@ -4234,7 +4234,7 @@ astropy.stats
 ^^^^^^^^^^^^^
 
 - Added ``sigma_lower`` and ``sigma_upper`` keywords to
-  ``sigma_clip`` to allow for unsymmetric clipping. [#3595]
+  ``sigma_clip`` to allow for non-symmetric clipping. [#3595]
 
 - Added ``cenfunc``, ``stdfunc``, and ``axis`` keywords to
   ``sigma_clipped_stats``. [#3792]

astropy/config/configuration.py

@@ -193,7 +193,7 @@ class _Conf(config.ConfigNamespace):
         element (e.g. 'astropy' if this is 'astropy.config.configuration')
         will be used to determine the name of the configuration file, while
         the remaining items determine the section. If None, the package will be
-        inferred from the package within whiich this object's initializer is
+        inferred from the package within which this object's initializer is
         called.
 
     aliases : str, or list of str, optional

astropy/convolution/convolve.py

@@ -184,7 +184,7 @@ def convolve(array, kernel, boundary='fill', fill_value=0.,
             array_internal = np.array(array, dtype=float, copy=False, order='C', subok=True)
     except (TypeError, ValueError) as e:
         raise TypeError('array should be a Numpy array or something '
-                        'convertable into a float array', e)
+                        'convertible into a float array', e)
     array_dtype = getattr(array, 'dtype', array_internal.dtype)
 
 
@@ -208,7 +208,7 @@ def convolve(array, kernel, boundary='fill', fill_value=0.,
             kernel_internal = np.array(kernel_internal, dtype=float, copy=True, order='C', subok=False)
         except (TypeError, ValueError) as e:
             raise TypeError('kernel should be a Numpy array or something '
-                            'convertable into a float array', e)
+                            'convertible into a float array', e)
 
 
     # Check that the number of dimensions is compatible

astropy/convolution/kernels.py

@@ -543,7 +543,7 @@ class MexicanHat1DKernel(Kernel1D):
     1D Mexican hat filter kernel.
 
     The Mexican Hat, or inverted Gaussian-Laplace filter, is a
-    bandpass filter. It smoothes the data and removes slowly varying
+    bandpass filter. It smooths the data and removes slowly varying
     or constant structures (e.g. Background). It is useful for peak or
     multi-scale detection.
 
@@ -613,7 +613,7 @@ class MexicanHat2DKernel(Kernel2D):
     2D Mexican hat filter kernel.
 
     The Mexican Hat, or inverted Gaussian-Laplace filter, is a
-    bandpass filter. It smoothes the data and removes slowly varying
+    bandpass filter. It smooths the data and removes slowly varying
     or constant structures (e.g. Background). It is useful for peak or
     multi-scale detection.
 

astropy/coordinates/baseframe.py

@@ -889,7 +889,7 @@ def replicate(self, copy=False, **kwargs):
         Return a replica of the frame, optionally with new frame attributes.
 
         The replica is a new frame object that has the same data as this frame
-        object and with frame attributes overriden if they are provided as extra
+        object and with frame attributes overridden if they are provided as extra
         keyword arguments to this method. If ``copy`` is set to `True` then a
         copy of the internal arrays will be made.  Otherwise the replica will
         use a reference to the original arrays when possible to save memory. The
@@ -918,7 +918,7 @@ def replicate_without_data(self, copy=False, **kwargs):
         Return a replica without data, optionally with new frame attributes.
 
         The replica is a new frame object without data but with the same frame
-        attributes as this object, except where overriden by extra keyword
+        attributes as this object, except where overridden by extra keyword
         arguments to this method.  The ``copy`` keyword determines if the frame
         attributes are truly copied vs being references (which saves memory for
         cases where frame attributes are large).
@@ -1491,7 +1491,7 @@ def separation(self, other):
 
             If the ``other`` coordinate object is in a different frame, it is
             first transformed to the frame of this object. This can lead to
-            unintutive behavior if not accounted for. Particularly of note is
+            unintuitive behavior if not accounted for. Particularly of note is
             that ``self.separation(other)`` and ``other.separation(self)`` may
             not give the same answer in this case.
 

astropy/coordinates/builtin_frames/altaz.py

@@ -65,7 +65,7 @@
     The refraction model is based on that implemented in ERFA, which is fast
     but becomes inaccurate for altitudes below about 5 degrees.  Near and below
     altitudes of 0, it can even give meaningless answers, and in this case
-    transforming to AltAz and back to another frame can give highly discrepent
+    transforming to AltAz and back to another frame can give highly discrepant
     results.  For much better numerical stability, leaving the ``pressure`` at
     ``0`` (the default), disabling the refraction correction (yielding
     "topocentric" horizontal coordinates).

astropy/coordinates/representation.py

@@ -2474,7 +2474,7 @@ def from_representation(cls, representation, base=None):
 
 
 class BaseSphericalCosLatDifferential(BaseDifferential):
-    """Differtials from points on a spherical base representation.
+    """Differentials from points on a spherical base representation.
 
     With cos(lat) assumed to be included in the longitude differential.
     """

astropy/coordinates/sky_coordinate.py

@@ -897,7 +897,7 @@ def separation(self, other):
 
             If the ``other`` coordinate object is in a different frame, it is
             first transformed to the frame of this object. This can lead to
-            unintutive behavior if not accounted for. Particularly of note is
+            unintuitive behavior if not accounted for. Particularly of note is
             that ``self.separation(other)`` and ``other.separation(self)`` may
             not give the same answer in this case.
 

astropy/coordinates/tests/test_unit_representation.py

@@ -1,5 +1,5 @@
 """
-This file tests the behaviour of subclasses of Representation and Frames
+This file tests the behavior of subclasses of Representation and Frames
 """
 
 from copy import deepcopy

astropy/coordinates/transformations.py

@@ -848,7 +848,7 @@ class FunctionTransformWithFiniteDifference(FunctionTransform):
         difference.  Both the to and the from frame will be checked for this
         attribute, but only one needs to have it. If None, no velocity
         component induced from the frame itself will be included - only the
-        re-orientation of any exsiting differential.
+        re-orientation of any existing differential.
     finite_difference_dt : `~astropy.units.Quantity` or callable
         If a quantity, this is the size of the differential used to do the
         finite difference.  If a callable, should accept

astropy/cosmology/funcs.py

@@ -21,7 +21,7 @@ def z_at_value(func, fval, zmin=1e-8, zmax=1000, ztol=1e-8, maxfun=500):
     methods (for example Planck13.distmod) is equal to a known value.
 
     .. warning::
-      Make sure you understand the behaviour of the function that you
+      Make sure you understand the behavior of the function that you
       are trying to invert! Depending on the cosmology, there may not
       be a unique solution. For example, in the standard Lambda CDM
       cosmology, there are two redshifts which give an angular

astropy/cosmology/tests/test_cosmology.py

@@ -1568,7 +1568,7 @@ def test_z_at_value():
     assert allclose(z_at_value(cosmo.distmod, 46 * u.mag),
                     1.9913891680278133, rtol=1e-6)
 
-    # test behaviour when the solution is outside z limits (should
+    # test behavior when the solution is outside z limits (should
     # raise a CosmologyError)
     with pytest.raises(core.CosmologyError):
         z_at_value(cosmo.angular_diameter_distance, 1500*u.Mpc, zmax=0.5)

astropy/extern/configobj/configobj.py

@@ -848,7 +848,7 @@ def walk(self, function, raise_errors=True,
         unless ``raise_errors=False``, in which case set the return value to
         ``False``.
 
-        Any unrecognised keyword arguments you pass to walk, will be pased on
+        Any unrecognized keyword arguments you pass to walk, will be pased on
         to the function you pass in.
 
         Note: if ``call_on_sections`` is ``True`` then - on encountering a
@@ -1208,7 +1208,7 @@ def __init__(self, infile=None, options=None, configspec=None, encoding=None,
             # TODO: check the values too.
             for entry in options:
                 if entry not in OPTION_DEFAULTS:
-                    raise TypeError('Unrecognised option "%s".' % entry)
+                    raise TypeError('Unrecognized option "%s".' % entry)
             for entry, value in list(OPTION_DEFAULTS.items()):
                 if entry not in options:
                     options[entry] = value

astropy/io/ascii/core.py

@@ -401,7 +401,7 @@ class DefaultSplitter(BaseSplitter):
     escapechar = None
     """ one-character stringto quote fields containing special characters """
     quoting = csv.QUOTE_MINIMAL
-    """ control when quotes are recognised by the reader """
+    """ control when quotes are recognized by the reader """
     skipinitialspace = True
     """ ignore whitespace immediately following the delimiter """
     csv_writer = None

astropy/io/ascii/ipac.py

@@ -351,7 +351,7 @@ class Ipac(basic.Basic):
       date Wed Sp 20 09:48:36 1995
       key_continue IPAC keywords can continue across lines
 
-    Note that there are different conventions for characters occuring below the
+    Note that there are different conventions for characters occurring below the
     position of the ``|`` symbol in IPAC tables. By default, any character
     below a ``|`` will be ignored (since this is the current standard),
     but if you need to read files that assume characters below the ``|``

astropy/io/ascii/tests/test_c_reader.py

@@ -1208,7 +1208,7 @@ def test_fortran_invalid_exp(parallel, guess):
 
         read_values = [col[0] for col in t5.itercols()]
         if os.name == 'nt':
-            # Apparently C strtod() on (some?) MSVC recognises 'd' exponents!
+            # Apparently C strtod() on (some?) MSVC recognizes 'd' exponents!
             assert read_values == vals_v or read_values == vals_e
         else:
             assert read_values == vals_e

astropy/io/fits/hdu/table.py

@@ -1151,7 +1151,7 @@ def load(cls, datafile, cdfile=None, hfile=None, replace=False,
         header : Header object
             When the cdfile and hfile are missing, use this Header object in
             the creation of the new table and HDU.  Otherwise this Header
-            supercedes the keywords from hfile, which is only used to update
+            supersedes the keywords from hfile, which is only used to update
             values not present in this Header, unless ``replace=True`` in which
             this Header's values are completely replaced with the values from
             hfile.

astropy/io/fits/header.py

@@ -1215,7 +1215,7 @@ def extend(self, cards, strip=True, unique=False, update=False,
 
         update : bool, optional
             If `True`, update the current header with the values and comments
-            from duplicate keywords in the input header.  This supercedes the
+            from duplicate keywords in the input header.  This supersedes the
             ``unique`` argument.  Commentary keywords are treated the same as
             if ``unique=True``.
 

astropy/io/fits/tests/test_fitstime.py

@@ -175,7 +175,7 @@ def test_fits_to_time_meta(self, table_types):
         t.meta['DATE'] = '1999-01-01T00:00:00'
         t.meta['MJD-OBS'] = 56670
 
-        # Test for default write behaviour (full precision) and read it
+        # Test for default write behavior (full precision) and read it
         # back using native astropy objects; thus, ensure its round-trip
         t.write(self.temp('time.fits'), format='fits', overwrite=True)
         tm = table_types.read(self.temp('time.fits'), format='fits',

astropy/io/misc/asdf/__init__.py

@@ -6,7 +6,7 @@
 Format (ASDF). This subpackage defines classes, referred to as **tags**, that
 implement the logic for serialization and deserialization.
 
-ASDF makes use of abstract data type definitons called **schemas**. The tag
+ASDF makes use of abstract data type definitions called **schemas**. The tag
 classes provided here are specific implementations of particular schemas. Some
 of the tags in Astropy (e.g., those related to transforms) implement schemas
 that are defined by the ASDF Standard. In other cases, both the tags and
@@ -18,7 +18,7 @@
 package. Users should never need to refer to tag implementations directly.
 Their presence should be entirely transparent when processing ASDF files.
 
-If both **asdf** and **astropy** are installed, no futher configuration is
+If both **asdf** and **astropy** are installed, no further configuration is
 required in order to process ASDF files. The **asdf** package has been designed
 to automatically detect the presence of the tags defined by **astropy**.
 

astropy/io/registry.py

@@ -54,7 +54,7 @@ def delay_doc_updates(cls):
 
     Notes
     -----
-    Registering mutliple readers and writers can cause significant overhead
+    Registering multiple readers and writers can cause significant overhead
     because the documentation of the corresponding ``read`` and ``write``
     methods are build every time.
 

astropy/modeling/core.py

@@ -1412,7 +1412,7 @@ def input_units(self):
 
         Model sub-classes can also use function annotations in evaluate to
         indicate valid input units, in which case this property should
-        not be overriden since it will return the input units based on the
+        not be overridden since it will return the input units based on the
         annotations.
         """
         if hasattr(self, '_input_units'):
@@ -1436,7 +1436,7 @@ def return_units(self):
 
         Model sub-classes can also use function annotations in evaluate to
         indicate valid output units, in which case this property should not be
-        overriden since it will return the return units based on the
+        overridden since it will return the return units based on the
         annotations.
         """
         if hasattr(self, '_return_units'):

astropy/modeling/fitting.py

@@ -627,7 +627,7 @@ def __call__(self, model, x, y, z=None, weights=None, **kwargs):
         """
 
         # For single models, the data get filtered here at each iteration and
-        # then passed to the fitter, which is the historical behaviour and
+        # then passed to the fitter, which is the historical behavior and
         # works even for fitters that don't understand masked arrays. For model
         # sets, the fitter must be able to filter masked data internally,
         # because fitters require a single set of x/y co-ordinates whereas the

astropy/modeling/projections.py

@@ -1226,7 +1226,7 @@ class Pix2Sky_ConicPerspective(Pix2SkyProjection, Conic):
 
     See `Conic` for a description of the entire equation.
 
-    The projection formulæ are:
+    The projection formulae are:
 
     .. math::
         C &= \sin \theta_a \\
@@ -1265,7 +1265,7 @@ class Sky2Pix_ConicPerspective(Sky2PixProjection, Conic):
 
     See `Conic` for a description of the entire equation.
 
-    The projection formulæ are:
+    The projection formulae are:
 
     .. math::
         C &= \sin \theta_a \\
@@ -1305,7 +1305,7 @@ class Pix2Sky_ConicEqualArea(Pix2SkyProjection, Conic):
 
     See `Conic` for a description of the entire equation.
 
-    The projection formulæ are:
+    The projection formulae are:
 
     .. math::
         C &= \gamma / 2 \\
@@ -1349,7 +1349,7 @@ class Sky2Pix_ConicEqualArea(Sky2PixProjection, Conic):
 
     See `Conic` for a description of the entire equation.
 
-    The projection formulæ are:
+    The projection formulae are:
 
     .. math::
         C &= \gamma / 2 \\
@@ -1394,7 +1394,7 @@ class Pix2Sky_ConicEquidistant(Pix2SkyProjection, Conic):
 
     See `Conic` for a description of the entire equation.
 
-    The projection formulæ are:
+    The projection formulae are:
 
     .. math::
 
@@ -1434,7 +1434,7 @@ class Sky2Pix_ConicEquidistant(Sky2PixProjection, Conic):
 
     See `Conic` for a description of the entire equation.
 
-    The projection formulæ are:
+    The projection formulae are:
 
     .. math::
 
@@ -1475,7 +1475,7 @@ class Pix2Sky_ConicOrthomorphic(Pix2SkyProjection, Conic):
 
     See `Conic` for a description of the entire equation.
 
-    The projection formulæ are:
+    The projection formulae are:
 
     .. math::
 
@@ -1524,7 +1524,7 @@ class Sky2Pix_ConicOrthomorphic(Sky2PixProjection, Conic):
 
     See `Conic` for a description of the entire equation.
 
-    The projection formulæ are:
+    The projection formulae are:
 
     .. math::
 

astropy/nddata/compat.py

@@ -58,7 +58,7 @@ class NDDataArray(NDArithmeticMixin, NDSlicingMixin, NDIOMixin, NDData):
         WCS-object containing the world coordinate system for the data.
 
         .. warning::
-            This is not yet defind because the discussion of how best to
+            This is not yet defined because the discussion of how best to
             represent this class's WCS system generically is still under
             consideration. For now just leave it as None
 

astropy/nddata/mixins/ndarithmetic.py

@@ -126,13 +126,13 @@ class NDArithmeticMixin:
     :meth:`NDArithmeticMixin.add`. ``None`` means that the result will have no
     uncertainty, ``False`` means it takes the uncertainty of the first operand
     (if this does not exist from the second operand) as the result's
-    uncertainty. This behaviour is also explained in the docstring for the
+    uncertainty. This behavior is also explained in the docstring for the
     different arithmetic operations.
 
     Decomposing the units is not attempted, mainly due to the internal mechanics
     of `~astropy.units.Quantity`, so the resulting data might have units like
     ``km/m`` if you divided for example 100km by 5m. So this Mixin has adopted
-    this behaviour.
+    this behavior.
 
     Examples
     --------

astropy/nddata/nddata.py

@@ -117,7 +117,7 @@ def __init__(self, data, uncertainty=None, mask=None, wcs=None,
 
         # Rather pointless since the NDDataBase does not implement any setting
         # but before the NDDataBase did call the uncertainty
-        # setter. But if anyone wants to alter this behaviour again the call
+        # setter. But if anyone wants to alter this behavior again the call
         # to the superclass NDDataBase should be in here.
         super().__init__()