devtools/eigen
1
0
Fork 0
mirror of https://gitlab.com/libeigen/eigen.git synced 2026-04-10 11:34:33 +08:00
Code Issues Packages Projects Releases Wiki Activity

last small fixes, this is alpha6, eigen2 is now ready for eigen1 apps to

Browse Source 
port to.
This commit is contained in:
Benoit Jacob
2008-08-12 02:14:02 +00:00
parent f04c1cb774
commit 13ad88736e
10 changed files with 33 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
doc/Doxyfile.in
View File

@@ -31,7 +31,7 @@ PROJECT_NAME = Eigen
# This could be handy for archiving the generated documentation or
# if some version control system is used.
PROJECT_NUMBER = 2.0-alpha5
PROJECT_NUMBER = 2.0-alpha6
# The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute)
# base path where the generated documentation will be put.
@@ -1185,7 +1185,8 @@ INCLUDE_FILE_PATTERNS =
PREDEFINED = EIGEN_EMPTY_STRUCT \
EIGEN_PARSED_BY_DOXYGEN \
EIGEN_VECTORIZE
EIGEN_VECTORIZE \
EIGEN_QT_SUPPORT
# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then
# this tag can be used to specify a list of macro names that should be expanded.

13
doc/snippets/MatrixBase_lazy.cpp
View File

@@ -1,10 +1,5 @@
Matrix2d m; m << 1,2,3,4;
Matrix2d n;
n = (m*m).lazy(); // if we did "n = m*m;" then m*m would first be evaluated into
// a temporary, because the Product expression has the EvalBeforeAssigningBit.
// This temporary would then be copied into n. Introducing this temporary is
// useless here and wastes time. Doing "n = (m*m).lazy();" evaluates m*m directly
// into n, which is faster. But, beware! This is only correct because m and n
// are two distinct matrices. Doing "m = (m*m).lazy();" would not produce the
// expected result.
cout << n << endl;
cout << (m*m).lazy().row(0) << endl;
// this computes only one row of the product. By contrast,
// if we did "(m*m).row(0);" then m*m would first be evaluated into
// a temporary, because the Product expression has the EvalBeforeNestingBit.