Mercurial > hg > octave-lojdl
changeset 14082:97f41a44dd80 stable
update NEWS file
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Wed, 21 Dec 2011 10:24:11 -0500 |
| parents | b69762f7a343 |
| children | 8717cc808b20 |
| files | NEWS |
| diffstat | 1 files changed, 114 insertions(+), 74 deletions(-) [+] |
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--- a/NEWS +++ b/NEWS @@ -3,27 +3,47 @@ ** The PCRE library is now required to build Octave. - ** The following binary elementwise operators and functions now perform - Numpy-like broadcasting (a.k.a. binary singleton expansion): + ** Many of Octave's binary operators (.*, .^, +, -, ...) now perform + automatic broadcasting for array operations that allows you to use + operator notation instead of calling bsxfun or expanding arrays (and + unnecessarily wasting memory) with repmat or similar idioms. For + example, to scale the columns of a matrix by the elements of a row + vector, you may now write - plus ldivide rem eq gt xor - minus power mod ne ge - times max atan2 lt and - rdivide min hypot le or + rv .* M + + In this expression, the number of elements of rv must match the + number of columns of M. The following operators are affected: - + .* & - - ./ | - .+ .\ - .- .^ + plus + .+ + minus - .- + times .* + rdivide ./ + ldivide .\ + power .^ .** + lt < + le <= + eq == + gt > + ge >= + ne != ~= + and & + or | + atan2 + hypot + max + min + mod + rem + xor - += .*= &= - -= ./= |= - .+= .\= - .-= .^= + additionally, since the A op= B assginment operators are equivalent + to A = A op B, the following operators are also affected: - This makes the bsxfun function mostly redundant except for - user-defined functions. A new section in the manual has been written - to explain and clarify this change. + += -= .+= .-= .*= ./= .\= .^= .**= &= |= + + See the new "Broadcasting Operations" chapter in the manual for more + details. ** Octave now features a profiler, thanks to the work of Daniel Kraft under the Google Summer of Code mentorship program. The manual has @@ -52,84 +72,104 @@ They now support nearly all Matlab functionality including: - * ML-compatible whitespace and delimiter defaults + * Matlab-compatible whitespace and delimiter defaults + + * Matlab-compatible options: 'whitespace', treatasempty', format + string repeat count, user-specified comment style, uneven-length + output arrays, %n and %u conversion specifiers (provisionally) - * ML-compatible options: 'whitespace', treatasempty', - format string repeat count, user-specified comment style, uneven-length - output arrays, %n and %u conversion specifiers (provisionally) + ** All .m string functions have been modified for better performance or + greater Matlab compatibility. Performance gains of 15X-30X have + been demonstrated. Operations on cell array of strings no longer pay + quite as high a penalty as those on 2-D character arrays. - ** All .m string functions have been modified for better performance or greater - Matlab compatibility. Performance gains of 15X-30X have been demonstrated. - Operations on cell array of strings no longer pay quite as high a penalty - as those on 2-D character arrays. + deblank: Now requires character or cellstr input. + + strtrim: Now requires character or cellstr input. + No longer trims nulls ("\0") from string for Matlab + compatibility. - deblank: Now requires character or cellstr input. - strtrim: Now requires character or cellstr input. - No longer trims nulls ("\0") from string for ML compatibility. - strmatch: Follows documentation precisely and ignores trailing spaces - in pattern and in string. Note that Matlab documents this - behavior but the implementation does *not* always follow it. - substr: Now possible to specify a negative LEN option which extracts - to within LEN of the end of the string. - strtok: Now accepts cellstr input. - base2dec, bin2dec, hex2dec: Now accept cellstr inputs. - dec2base, dec2bin, dec2hex: Now accept cellstr inputs. - index, rindex: Now accept 2-D character array input. - strsplit: Now accepts 2-D character array input. + strmatch: Follows documentation precisely and ignores trailing spaces + in pattern and in string. Note that this is documented + Matlab behavior but the implementation apparently does + not always follow it. + + substr: Now possible to specify a negative LEN option which + extracts to within LEN of the end of the string. + + strtok: Now accepts cellstr input. + + base2dec, bin2dec, hex2dec: + Now accept cellstr inputs. + + dec2base, dec2bin, dec2hex: + Now accept cellstr inputs. + + index, rindex: + Now accept 2-D character array input. + + strsplit: Now accepts 2-D character array input. ** Geometry functions derived from Qhull (convhull, delaunay, voronoi) - have been revamped. The options passed to the underlying qhull command - have been changed for better results or for Matlab compatibility. + have been revamped. The options passed to the underlying qhull + command have been changed for better results or for Matlab + compatibility. + + convhull: Default options are "Qt" for 2D, 3D, 4D inputs + Default options are "Qt Qx" for 5D and higher + + delaunay: Default options are "Qt Qbb Qc Qz" for 2D and 3D inputs + Default options are "Qt Qbb Qc Qx" for 4D and higher - convhull : Default options are "Qt" for 2D, 3D, 4D inputs - Default options are "Qt Qx" for 5D and higher - delaunay : Default options are "Qt Qbb Qc Qz" for 2D and 3D inputs - Default options are "Qt Qbb Qc Qx" for 4D and higher - voronoi : No default arguments + voronoi: No default arguments + + ** Date/Time functions updated. Millisecond support with FFF format + string now supported. - ** Date/Time functions updated. - Millisecond support with FFF format string now supported. + datestr: Numerical formats 21, 22, 29 changed to match Matlab. + Now accepts cellstr inputs. - datestr : Numerical formats 21, 22, 29 changed to match Matlab. - Now accepts cellstr inputs. + ** The following warning IDs have been removed: - ** Octave warning IDs updated - "associativity-change": removed - "complex-cmp-ops" : removed - "empty-list-elements" : removed - "fortran-indexing" : removed - "precedence-change" : removed - "string-concat" : renamed to "mixed-string-concat" + Octave:associativity-change + Octave:complex-cmp-ops + Octave:empty-list-elements + Octave:fortran-indexing + Octave:precedence-change + + ** The warning ID Octave:string-concat has been renamed to + Octave:mixed-string-concat. - ** Matlab-compatible preference functions added: + ** Octave now includes the following Matlab-compatible preference + functions: - addpref getpref ispref rmpref setpref + addpref getpref ispref rmpref setpref - ** Matlab-compatible handle graphics functions added: + ** The following Matlab-compatible handle graphics functions have been + added: - guidata uipanel uitoolbar - guihandles uipushtool uiwait - uicontextmenu uiresume waitfor - uicontrol uitoggletool + guidata uipanel uitoolbar + guihandles uipushtool uiwait + uicontextmenu uiresume waitfor + uicontrol uitoggletool The uiXXX functions above are experimental. - Except for uiwait and uiresume, the uiXXX functions are not supported on - the FLTK backend. + Except for uiwait and uiresume, the uiXXX functions are not + supported with the the FLTK+OpenGL graphics toolkit. - The gnuplot backend does not support any of the uiXXX functions nor - the waitfor function. + The gnuplot graphics toolkit does not support any of the uiXXX + functions nor the waitfor function. - ** New keyword parfor - - parfor (parallel for loop) is now recognized as a valid keyword. - Implementation, however, is still mapped to an ordinary for loop. + ** New keyword parfor (parallel for loop) is now recognized as a valid + keyword. Implementation, however, is still mapped to an ordinary + for loop. ** Other new functions added in 3.6.0: - is_dq_string nthargout usejava - is_sq_string python waitbar - narginchk recycle zscore + is_dq_string nthargout usejava + is_sq_string python waitbar + narginchk recycle zscore ** Deprecated functions.