repair sript
in [Matlab]
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From: us on 16 Jun 2010 16:31 "wahyoe Unggul" <wahyoe_slipnot(a)yahoo.co.id> wrote in message <hvbb57$7lk$1(a)fred.mathworks.com>... > you can help me > I make sript from matlab to plane Frame structures 3D analyse, > for 25 element/member ( example of 1), analysis process can be done swiftly, > but for joint with number of 1000 element/member ( example 2) > processed its(the analysis eating finite time of 6 hour(clock, > does you can assist I to improve or repair sript, > to process analysis can be done swiftly (fast analysis). > will name of your email, I will send sript example > thank's before > > regard > wahyoe > wahyoe_slipnot(a)yahoo.co.id CSSM is a NG - thus, CSSMers do not communicate by email... us
From: Walter Roberson on 16 Jun 2010 17:21 wahyoe Unggul wrote: > you can help me > I make sript from matlab to plane Frame structures 3D analyse, for 25 > element/member ( example of 1), analysis process can be done swiftly, > but for joint with number of 1000 element/member ( example 2) > processed its(the analysis eating finite time of 6 hour(clock, > does you can assist I to improve or repair sript, > to process analysis can be done swiftly (fast analysis). Given that description is seems most probable to me that you are not pre-allocating your results array and that your routine is spending a lot of time expanding the results array as you write new values. Have you used the matlab profiler to determine where your routine is spending most of its time?
From: wahyoe Unggul on 18 Jun 2010 19:48 Can you help me, can function under these modified to use smaller memory function [A]=assembly; load scratch_file.txt; tA=scratch_file;clear scratch_file; m=max(tA(:,2)); A=zeros(m,m); %B=zeros(size(tA)); B=A;C=A; for i=1:length(tA); C=A; B(tA(i,2),tA(i,3))=tA(i,1); A(tA(i,2),tA(i,3))=B(tA(i,2),tA(i,3))+C(tA(i,2),tA(i,3)); end; delete scratch_file.txt;
From: Walter Roberson on 18 Jun 2010 20:42 wahyoe Unggul wrote: > Can you help me, can function under these modified to use smaller memory > function [A]=assembly; > > load scratch_file.txt; > tA=scratch_file;clear scratch_file; > m=max(tA(:,2)); > A=zeros(m,m); > %B=zeros(size(tA)); > B=A;C=A; > for i=1:length(tA); > C=A; > B(tA(i,2),tA(i,3))=tA(i,1); > A(tA(i,2),tA(i,3))=B(tA(i,2),tA(i,3))+C(tA(i,2),tA(i,3)); > end; > delete scratch_file.txt; You did not respond to my questions and code that was in reply to your posting of the same question under the title "accelerating function".
From: wahyoe Unggul on 18 Jun 2010 21:00
I do not use Matlab profiler, I calculate the time to execute a matrix with the manual, I think there is an error function "assembly", when entering data (matrix) small size can be executed quickly but instead, jiak data (matrix) large size is very slow (time old) to be executed, can you help to correct the above functions so that data (matrix) which can be executed with large quick times thanks before |