Mercurial > web-octave
diff NEWS-3.6.html @ 67:373d2dba318e kai
Include stuff from current octave.org for later hosting.
author | Kai T. Ohlhus <k.ohlhus@gmail.com> |
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date | Thu, 13 Oct 2016 17:41:24 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/NEWS-3.6.html Thu Oct 13 17:41:24 2016 +0200 @@ -0,0 +1,213 @@ +<pre> +Summary of important user-visible changes for version 3.6: +--------------------------------------------------------- + + ** The PCRE library is now required to build Octave. If a pre-compiled + package does not exist for your system, you can find PCRE sources + at http://www.pcre.org + + ** The ARPACK library is no longer distributed with Octave. + If you need the eigs or svds functions you must provide an + external ARPACK through a package manager or by compiling it + yourself. If a pre-compiled package does not exist for your system, + you can find the current ARPACK sources at + http://forge.scilab.org/index.php/p/arpack-ng + + ** Many of Octave's binary operators (.*, .^, +, -, ...) now perform + automatic broadcasting for array operations which 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 + + 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 assignment operators are equivalent + to A = A op B, the following operators are also affected: + + += -= .+= .-= .*= ./= .\= .^= .**= &= |= + + See the "Broadcasting" section in the new "Vectorization and Faster + Code Execution" chapter of 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 + been updated to reflect this addition. The new user-visible + functions are profile, profshow, and profexplore. + + ** Overhaul of statistical distribution functions + + Functions now return "single" outputs for inputs of class "single". + + 75% reduction in memory usage through use of logical indexing. + + Random sample functions now use the same syntax as rand and accept + a comma separated list of dimensions or a dimension vector. + + Functions have been made Matlab-compatible with regard to special + cases (probability on boundaries, probabilities for values outside + distribution, etc.). This may cause subtle changes to existing + scripts. + + negative binomial function has been extended to real, non-integer + inputs. The discrete_inv function now returns v(1) for 0 instead of + NaN. The nbincdf function has been recoded to use a closed form + solution with betainc. + + ** strread, textscan, and textread have been completely revamped. + + They now support nearly all Matlab functionality including: + + * 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) + + ** 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. + + 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. + + 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 + + ** 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 input. + + ** The following warning IDs have been removed: + + 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. + + ** Octave now includes the following Matlab-compatible preference + functions: + + addpref getpref ispref rmpref setpref + + ** The following Matlab-compatible handle graphics functions have been + added: + + 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 with the FLTK+OpenGL graphics toolkit. + + The gnuplot graphics toolkit does not support any of the uiXXX + functions nor the waitfor function. + + ** 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: + + bicg nthargout usejava + is_dq_string narginchk waitbar + is_sq_string python zscore + is_function_handle register_graphics_toolkit + loaded_graphics_toolkits recycle + + ** Deprecated functions. + + The following functions were deprecated in Octave 3.2 and have been + removed from Octave 3.6. + + create_set spcholinv splu + dmult spcumprod spmax + iscommand spcumsum spmin + israwcommand spdet spprod + lchol spdiag spqr + loadimage spfind spsum + mark_as_command sphcat spsumsq + mark_as_rawcommand spinv spvcat + spatan2 spkron str2mat + spchol splchol unmark_command + spchol2inv split unmark_rawcommand + + The following functions have been deprecated in Octave 3.6 and will + be removed from Octave 3.10 (or whatever version is the second major + release after 3.6): + + cut is_duplicate_entry + cor polyderiv + corrcoef shell_cmd + __error_text__ studentize + error_text sylvester_matrix +</pre>