sulfateion's articles:

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urlfilter not found 0 21 (10/25/2012 3:31:24 AM) comp.soft-sys.matlab Hi, I've tried to do a test about Trendy http://www.mathworks.com/matlabcentral/trendy/Tutorial/trendco.html, but error message shows "urlfilter not found" for Help or in Google. Mike ... Mike

cell simplify and initilialize #2 0 44 (10/20/2012 1:56:56 AM) comp.soft-sys.matlab Hi following code needs to be simplified >> A=cell(2,3); >> A{1}(:)=[5:8,14:15,19:20] ??? In an assignment A(:) = B, the number of elements in A and B must be the same. Sure following it's ok,... Mike

cell simplify and initilialize 1 39 (10/20/2012 1:55:09 AM) comp.soft-sys.matlab Hi following code needs to be simplified >> A=cell(2,3); >> A{1}(:)=[5:8,14:15,19:20] ??? In an assignment A(:) = B, the number of elements in A and B must be the same. Sure following it's ok, but c... Mike

with or without [] in fprintf usage 1 40 (10/17/2012 3:43:48 AM) comp.soft-sys.matlab Hi I confuse to use fprintf when with or without [] as codes following: A=magic(3) >> B=zeros([3,3,2]) >> B(:,:,1)=A >> B(:,:,2)=A+1 >> fprintf('%f %f\n',B(2,3,:),B(2,2,:)) 7.000000 8.000000 5.0... Mike

speed up for iteration in every element 0 36 (10/12/2012 12:44:33 AM) comp.soft-sys.matlab Hi Following code takes a lot of time to execute. It is done element by element, because it needs iteration. Could it be faster by matrix? X2=X1; % initialize X2 for irow=1:nrow for icol=1:ncol ... Mike

preallocate different sizes of a 2D matrix with a same variable 4 42 (10/11/2012 1:41:12 AM) comp.soft-sys.matlab Hi Is it possible to preallocate different sizes of a 2D matrix with a same variable? For example first element is 2 x 2 second element is 3 x 3 I try X=zeros(2,2,1) X=zeros(3,3,2) But sure it doesn't... Mike

quick way to calculate standard deviation of multiple images #2 5 49 (10/10/2012 2:54:56 AM) comp.soft-sys.matlab Hi I have n images and want to calculate standard deviation of these images for every pixel. My code is X=zeros(nrow,ncol,nimg); for irow=1:nrow for icol=1:ncol tmp=X(irow,icol,:); ... Mike

quick way to calculate standard deviation of multiple images 0 32 (10/10/2012 2:52:47 AM) comp.soft-sys.matlab Hi I have n images and want to calculate standard deviation of these images for every pixel. My code is X=zeros(nrow,ncol,nimg); for irow=1:nl for icol=1:ns tmp=X(irow,icol,:); ... Mike

changed pixels from multiple images 0 20 (10/10/2012 2:31:28 AM) comp.soft-sys.matlab Hi I have some multi-temporale images for a fixed site. I'd like to detect the changed pixels. Is there any suggestion? or sample codes? Thanks. Mike ... Mike

imtool show different image for lots of images 0 43 (10/3/2012 3:21:56 AM) comp.soft-sys.matlab Hi I use imtool to show about 30 truecolor images whose size is 1500x1500 and datatype is double. Some images are gray. Then I close all the imtool windows. Use imtool again to show those gray-color images ... Mike

sulfateion's replies:

Items(95) /10 Next >> Last >|

preallocate different sizes of a 2D matrix with a same variable 4 42 (10/11/2012 1:41:12 AM) comp.soft-sys.matlab Hi Is it possible to preallocate different sizes of a 2D matrix with a same variable? For example first element is 2 x 2 second element is 3 x 3 I try X=zeros(2,2,1) X=zeros(3,3,2) But sure it doesn't... sulfateion (350)

quick way to calculate standard deviation of multiple images #2 5 49 (10/10/2012 2:54:56 AM) comp.soft-sys.matlab Hi I have n images and want to calculate standard deviation of these images for every pixel. My code is X=zeros(nrow,ncol,nimg); for irow=1:nrow for icol=1:ncol tmp=X(irow,icol,:); ... sulfateion (350)

no cell titles found 2 42 (9/22/2012 2:39:14 AM) comp.soft-sys.matlab Hi, When windows updated and computer rebooted, I found my m file containing multiple cells shows "no cell titles found". I newly create a new M file, it does work for %% as a cell. What happened? Mike ... sulfateion (350)

parfor: keep outputs with same output filename 12 57 (7/21/2012 3:56:23 AM) comp.soft-sys.matlab Hi, If I run an exection file which output the same filename for many times using parfor, the output files will be overwritten. At last, I have only one output file. How to keep the output file in every run?... sulfateion (350)

out of memory #39 3 40 (10/27/2011 12:23:54 PM) comp.soft-sys.matlab Hi, >> close all; >> z=zeros(601,601,7) ??? Out of memory. Type HELP MEMORY for your options. >> 601*601*7*8 ans = 20227256 why? Mike ... sulfateion (350)

Wilconx signed-rank test (signrank) in one-tail 1 42 (7/21/2011 8:10:06 AM) comp.soft-sys.matlab Hi, I try a test on Wilconx signed-rank test using following: >> m=92;x=[78 104 84 70 96 73 87 85 76 94]'; >> [p,h,stats]=signrank(x,m,'alpha',0.025) p = 0.0645 h = 0 stats = signedrank: 9... sulfateion (350)

more xticks displayed in datetick? 6 45 (6/17/2011 3:42:02 AM) comp.soft-sys.matlab Hi, I have about a dataset with 8000x1 vector. x is in datenumber. When I use datetick: datetick('x','yy/mm','keepticks'); there are too many ticks. But if I use without 'keepticks', there only january display... sulfateion (350)

fprintf 2 4 32 (5/7/2011 4:04:33 AM) comp.soft-sys.matlab Hi >> label={'ccc';'aaa';'ccc'};data=[-0.9;0.8;-0.7] data = -0.9000 0.8000 -0.7000 >> lindx=data> fprintf('%s %f\n',[label{lindx},data(lindx)]') Warning: Out of range or non-integer values truncat... sulfateion (350)

fprintf #22 3 36 (5/7/2011 2:16:47 AM) comp.soft-sys.matlab Hi, >> str='aaaaa';f=[0.22 0.333]; >> fprintf('%s %f %f\n',str,f) aaaaa 0.220000 0.333000 >> fprintf('%s %f %f\n',[str,f]') aaaaa >> >> [str,f]' ans = a a a a a I expect to print 'aaaaa' 0.22 0.333 how to ... sulfateion (350)

setdiff not sorted 2 55 (4/30/2011 8:38:48 AM) comp.soft-sys.matlab Hi, I'd like to remove an element from a cell array. though I've surfed the groups, however, I still can not understand. Hence, given a simple example here: >> a={'bbb','ccc','aaa'} a = 'bbb' 'ccc' ... sulfateion (350)