Thanks I am going to try this. Ps the goal here is to produce an image that can easily be pasted into a word document where it can be resized also if necc.
cheers Roelof "Have a cool mind and a warm heart" - Ajahn Sona "Like ......(hamsters on a wheel), (ambitious people) still climb and climb, with great labor, and incessant anxiety, but never reach the top." Robert Browning "We shall not cease from exploration. And at the end of all our exploring Will be to arrive were we started and know the place for the first time" - T. S. Eliot Dr. Roelof K. Brouwer PH.D. P.Eng. Professor Emeritus Dept. of Computing Science School of Advanced Technologies and Mathematics Thompson Rivers University 900 McGill Road Kamloops, BC Canada, V2C 5N3 email : [email protected] www.tru.ca/advtech/compsci/faculty/rbrouwer -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Devon McCormick Sent: December-15-08 7:18 AM To: Programming forum Subject: Re: [Jprogramming] savemat_jviewmat_ Roelof - here's an example load 'images' arbimage=. <.20*+/~2 o. i:3j999 NB. Arbitrary image: 1000x1000 (<./,>./),arbimage NB. Integers from _40 to 39 _40 39 arbimage{~,&.>~495+i.5 5 NB. High values in center 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 39 5 5{.arbimage NB. Low values in corners _40 _40 _40 _40 _40 _40 _40 _40 _40 _40 _40 _40 _40 _40 _40 _40 _40 _40 _40 _40 _40 _40 _40 _40 _40 makeGrayPal=: [: |: 3 # [: ,: [: <. 0.5 + i. * 255 % <: NB.* makeGrayPal: make gray-scale palette with y entries. $pal100=. makeGrayPal 100 100 3 (3&{.,_3&{.) pal100 NB. palette ranges from black to white 0 0 0 3 3 3 5 5 5 250 250 250 252 252 252 255 255 255 NB. Write an image file using the palette. (pal100{~arbimage-<./,arbimage) write_image 'C:\temp\pseudoDensity.png' 73624 NB. ".png" is efficient format for generated images; figures type from suffix: (pal100{~arbimage-<./,arbimage) write_image 'C:\temp\pseudoDensity.jpg' 191578 NB. ".jpg" takes 191K, ".png" only 74K. NB. File will look like this: (79{.pal100) viewmat arbimage NB. where we use "79" because (>./-<./),arbimage 79 On Mon, Dec 15, 2008 at 8:49 AM, Roelof K Brouwer <[email protected]>wrote: > You are right in that most of the time when I start to expand the window I > will get the right image. However sometimes even with that action I get > the > wrong image ( vague , hazy lines as opposed to squares. Also in ijx with > debug on which I used to stop my verb before the savemat action I get the > same result in the ijx window. > My images are simply like density plots and I will look at image3 addon. Is > it a matter of replacing 2 lines with 2 lines in my verb or something much > more complex ( nothing to do with complex numbers) than that. > > cheers > > > Roelof > > "Have a cool mind and a warm heart" - Ajahn Sona > "Like ......(hamsters on a wheel), (ambitious people) still climb and > climb, with great labor, and incessant anxiety, but never reach the top." > Robert Browning > "We shall not cease from exploration. And at the end of all our exploring > Will be to arrive were we started and know the place for the first time" - > T. S. Eliot > > > Dr. Roelof K. Brouwer PH.D. P.Eng. > Professor Emeritus > Dept. of Computing Science > School of Advanced Technologies and Mathematics > Thompson Rivers University > 900 McGill Road > Kamloops, BC > Canada, V2C 5N3 > > email : [email protected] > www.tru.ca/advtech/compsci/faculty/rbrouwer > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Devon McCormick > Sent: December-14-08 9:32 PM > To: Programming forum > Subject: Re: [Jprogramming] savemat_jviewmat_ > > Dr. Brouwer - I think this is not so much a Vista 64-bit problem but a > general problem with the event-loop/message-pump handling. > > I've encountered this problem before: I have a sequence of lines of code > that work fine in immediate execution but fail when they're in a function. > I believe the problem is that viewmat needs to get to a state of waiting > for > user input before it will finish displaying its picture. This doesn't > happen within multiple lines in a function, so only a blank picture is > saved. > > I've tried lots of different ways to get around this and have settled on > using the "image3" add-on to write my images instead of relying on viewmat. > This is too bad because viewmat does offer a nice display of complex > numbers > that I haven't replicated with image3 code. > > This problem is also mentioned by Dan Bron at > http://www.jsoftware.com/jwiki/DanBron/Snippets/PrettyPictures and even > Oleg > doesn't have a solution. > > Regards, > > Devon** > > On Sun, Dec 14, 2008 at 12:54 PM, Roelof K Brouwer > <[email protected]>wrote: > > > I have problems with viewmat save in vista 64bit. In particular the > > following two statements > > > > > > > > > > > > ( 1 4 14 {". COLOR16) viewmat i.4 4 > > > > savemat_jviewmat_ 'C:\Temp\garbage.bmp' > > > > > > > > > > > > this will give a blank window when used in a verb > > > > and also in ijx when debug is in > > > > sometimes by adjusting the viewmat window I will get the proper display . > > i.e. click the margin of the window for exdpansion. However sometimes on > > expansion the window does not have the correct > > > > displayI > > > > if I remove the save command things will work > > > > > > > > when in ijx I can first run viewmat command and then the save command and > > things will work > > > > I also tried puttting a delay between the two viewmat commands > > > > > > > > here is my complete file with verb > > > > > > > > drivedata=: 'C:\Users\RKBrouwer\Documents\ACA\Research\ResData\' > > > > drive_op=:'C:\Users\RKBrouwer\Documents\Temp\Set\' > > > > drive=:'C:\Users\RKBrouwer\Documents\ACA\' > > > > require 'viewmat color16 plot' > > > > load 'C:\Users\RKBrouwer\Documents\J_Code_Roelof\J_utilities_roelof.ijs' > > > > NB. load > > 'C:\Users\RKBrouwer\Documents\J_utilities_roelof\visual_clustering.ijs' > > > > require 'jfiles' > > > > > > > > test_viewmat=:3 : 0 > > > > ( 1 4 14 {". COLOR16) viewmat i.4 4 > > > > savemat_jviewmat_ 'C:\Temp\garbage.bmp' > > > > ) > > > > > > > > > > > > > > > > cheers > > > > > > > > > > > > Roelof > > > > > > > > "Have a cool mind and a warm heart" - Ajahn Sona > > > > "Like ......(hamsters on a wheel), (ambitious people) still climb and > > climb, with great labor, and incessant anxiety, but never reach the top." > > Robert Browning > > > > "We shall not cease from exploration. And at the end of all our exploring > > > > Will be to arrive were we started and know the place for the first time" > - > > T. S. Eliot > > > > > > > > > > > > Dr. Roelof K. Brouwer PH.D. P.Eng. > > > > Professor Emeritus > > > > Dept. of Computing Science > > > > School of Advanced Technologies and Mathematics > > > > Thompson Rivers University > > > > 900 McGill Road > > > > Kamloops, BC > > > > Canada, V2C 5N3 > > > > > > > > email : <mailto:[email protected]> [email protected] > > > > <http://www.tru.ca/advtech/compsci/faculty/rbrouwer> > > www.tru.ca/advtech/compsci/faculty/rbrouwer > > > > > > > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > > > > > -- > Devon McCormick, CFA > ^me^ at acm. > org is my > preferred e-mail > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > -- Devon McCormick, CFA ^me^ at acm. org is my preferred e-mail ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
