Re: [Scilab-users] Booeleans : irrelevant results ?
Dear Paul, The behaviour of test 2 may come from the order in which the operations are performed : Note that (a c b) ~= (b c a), indeed : - a c b performs a c which returns [] and then [] b which returns [], - b c a performs b c which returns %t and then %t [] which returns %t. You can obtain the desired behaviour by adding parenthesis b (c a) returns [] but it may be safer to use isempty() to check whether a variable is empty or not. Best regards, Pierre Le 27.08.2015 12:29, Carrico, Paul a écrit : Dear All, I wondering what I'm doing wrong in the examples here bellow: - Test 1 à M returns False that's ok for me - Test 2 à should return False as well, shouldn't be ? - Test 3 à another test using directly a Boolean instead of an empty form [] - Test 4 à as expected, it returns F Thanks for any highlight Paul ## mode(0) _// test 1_ M = []; if M then printf(M returns T\n); else printf(M returns F\n); end _// test 2_ a=[]; b=30; c=200; if (b c a) then printf(val = 6\n); else printf(val = []\n); _// should return [] ??_ end _// test 3_ tmp = %f; _//tmp = %t;_ if (tmp) then printf(tmp returns T\n); else printf(tmp returns F\n); end _// test 4_ t1 = %t; t2 = %t; _//t3 = %t;_ t3 = %f; if (t1 t2 t3) then printf((t1,t2,t3) returns T\n); else printf((t1,t2,t3) returns F\n); end EXPORT CONTROL : Cet email ne contient pas de données techniques This email does not contain technical data ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users [1] Links: -- [1] http://lists.scilab.org/mailman/listinfo/users ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
[Scilab-users] Typo in Help File
Sirs: I just downloaded 5.5.2 for Linux, which I'm running on Scientific Linux. I opened the Help File (?) and looked for numderivative. Scilab Help Optimization and Simulation numderivative Under Arguments f a function or a list, the function to differenciate differenciate should be differentiate Hope you find this useful. Keith Smith -- Coincidence is what is leftover when the theory isn't good enough - quoted by John Cleese Science is the belief in ignorance of experts - Richard Fenyman ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
Re: [Scilab-users] Limit command
This likely comes from/with a symbolic toolbox. For Scilab, the Scimax module interfaces Scilab with Maxima. ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
Re: [Scilab-users] Error while calling 'builder gateway function' using bash script
Hello Lavitha, Why are you using such a small timeout duration `timeout 1` ? Do you really expect a 1s scilab startup + compilation ? Dear All, I am trying to call OpenCV codes from scilab and for this I need a builder gateway function. While calling the function on the scilab console, I do not face any problems, loader gets generated and and I am able to call the functions. Now I am trying to call the builder file using bash script. It executes and runs till make file as shown below: Generate a gateway file Generate a loader file Generate a Makefile ilib_gen_Make: Copy compilation files (Makefile*, libtool...) to TMPDIR ilib_gen_Make: Copy libskeleton_cpp9990.c to TMPDIR ilib_gen_Make: Copy opencv_imread.cpp to TMPDIR ilib_gen_Make: configure : Generate Makefile. where as the below 3 lines are not generated as it does on Scilab console. ilib_gen_Make: Modification of the Makefile in TMPDIR Running the makefile Generate a cleaner file -- Clément ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
Re: [Scilab-users] Limit command
I have Scimax installed, and it recognizes *syms* but only if i type *Syms*. However, it doesn't suggest anything on *limit* -- View this message in context: http://mailinglists.scilab.org/Limit-command-tp4032725p4032738.html Sent from the Scilab users - Mailing Lists Archives mailing list archive at Nabble.com. ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
[Scilab-users] Booeleans : irrelevant results ?
Dear All, I wondering what I'm doing wrong in the examples here bellow: - Test 1 -- M returns False that's ok for me - Test 2 -- should return False as well, shouldn't be ? - Test 3 -- another test using directly a Boolean instead of an empty form [] - Test 4 -- as expected, it returns F Thanks for any highlight Paul ## mode(0) // test 1 M = []; if M then printf(M returns T\n); else printf(M returns F\n); end // test 2 a=[]; b=30; c=200; if (b c a) then printf(val = 6\n); else printf(val = []\n); // should return [] ?? end // test 3 tmp = %f; //tmp = %t; if (tmp) then printf(tmp returns T\n); else printf(tmp returns F\n); end // test 4 t1 = %t; t2 = %t; //t3 = %t; t3 = %f; if (t1 t2 t3) then printf((t1,t2,t3) returns T\n); else printf((t1,t2,t3) returns F\n); end EXPORT CONTROL : Cet email ne contient pas de données techniques This email does not contain technical data ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
Re: [Scilab-users] Booeleans : irrelevant results ?
Effectively it is much better to use isempty() function (or ~isempty() in the current case) … I didn’t know it so far Many thanks for your help Paul EXPORT CONTROL : Cet email ne contient pas de données techniques This email does not contain technical data De : Pierre Vuillemin [mailto:cont...@pierre-vuillemin.fr] Envoyé : jeudi 27 août 2015 13:08 À : Users mailing list for Scilab Cc : Carrico, Paul Objet : Re: [Scilab-users] Booeleans : irrelevant results ? Dear Paul, The behaviour of test 2 may come from the order in which the operations are performed : Note that (a c b) ~= (b c a), indeed : - a c b performs a c which returns [] and then [] b which returns [], - b c a performs b c which returns %t and then %t [] which returns %t. You can obtain the desired behaviour by adding parenthesis b (c a) returns [] but it may be safer to use isempty() to check whether a variable is empty or not. Best regards, Pierre Le 27.08.2015 12:29, Carrico, Paul a écrit : Dear All, I wondering what I’m doing wrong in the examples here bellow: - Test 1 -- M returns False that’s ok for me - Test 2 -- should return False as well, shouldn’t be ? - Test 3 -- another test using directly a Boolean instead of an empty form [] - Test 4 -- as expected, it returns F Thanks for any highlight Paul ##” mode(0) // test 1 M = []; if M then printf(M returns T\n); else printf(M returns F\n); end // test 2 a=[]; b=30; c=200; if (b c a) then printf(val = 6\n); else printf(val = []\n); // should return [] ?? end // test 3 tmp = %f; //tmp = %t; if (tmp) then printf(tmp returns T\n); else printf(tmp returns F\n); end // test 4 t1 = %t; t2 = %t; //t3 = %t; t3 = %f; if (t1 t2 t3) then printf((t1,t2,t3) returns T\n); else printf((t1,t2,t3) returns F\n); end EXPORT CONTROL : Cet email ne contient pas de données techniques This email does not contain technical data ___ users mailing list users@lists.scilab.orgmailto:users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/usershttps://urldefense.proofpoint.com/v2/url?u=http-3A__lists.scilab.org_mailman_listinfo_usersd=AwMFaQc=0hKVUfnuoBozYN8UvxPA-wr=4TCz--8bXfJhZZvIxJAemAJyz7Vfx78XvgYu3LN7eLom=CsJzSea7OehSm_fgX8J6czbmq4kUd-ws1o3meFqpHeks=EFhyGA5WXCbkAbKVE545SI6VDStjViqsaNYDJ3bW3uwe= ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
Re: [Scilab-users] Limit command
Hi: i looked in the scilab help with scimax toolbox loaded, and it finds limit function! its a scimax function... Can you send me what errors appears in the console when you try to execute that script? I'm having some troubles with the scilab function roots... Im using scilab 5.5.2 however... Date: Thu, 27 Aug 2015 03:23:06 -0700 From: dool...@gmail.com To: users@lists.scilab.org Subject: Re: [Scilab-users] Limit command I have Scimax installed, and it recognizes *syms* but only if i type *Syms*. However, it doesn't suggest anything on *limit* -- View this message in context: http://mailinglists.scilab.org/Limit-command-tp4032725p4032738.html Sent from the Scilab users - Mailing Lists Archives mailing list archive at Nabble.com. ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
Re: [Scilab-users] Limit command
-- View this message in context: http://mailinglists.scilab.org/Limit-command-tp4032725p4032744.html Sent from the Scilab users - Mailing Lists Archives mailing list archive at Nabble.com. ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
Re: [Scilab-users] Limit command
Actually, you're right, it does recognize it. However, there is a problem
with the line with roots command which you mentioned if I'm not mistaking.
This is the error
exec('/home/xubuntu/Desktop/primer.sce', -1)
zp = roots (X1);
!--error 246
Function not defined for given argument type(s),
check arguments or define function %sym_roots for overloading.
at line 6 of exec file called by :
exec('/home/xubuntu/Desktop/primer.sce', -1)
--
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Re: [Scilab-users] Limit command
]Im sorry, i forgot to tell you that every polynomial in my final script should be defined the same way that the first one... But the corrected script i send you first should work fine From: pablo_...@hotmail.com To: users@lists.scilab.org Date: Thu, 27 Aug 2015 21:45:46 -0300 Subject: Re: [Scilab-users] Limit command Hi: Limit IS a scimax function... i used your script and it worked with some modifications... First of all, the scilab function roots need a variable type polinomial as argument... and the symbolic polynomial made by scimas is not this type of variable, so we need to use scimax's function sym2poly... However, sym2poly needs an expanded polynomial as argument... so we first need to use expand on the polynomial we want to calculate the roots... So your final script should be: z = %z; Syms n z1; z = z1 X =z *(3*z -(5/6) ) /((z -(1/4) )*(z -(1/3) )) X1 = expand(denom (X)); X1=sym2poly(X1,'z1'); zp = roots(X1); X1 = z1 *(3* z1 -(5/6) ) /(( z1 -(1/4) )*(z1 -(1/3) )) F1 = X1 *( z1 ^(n -1) )*(z1 -zp (1) ); F2 = X1 *( z1 ^(n -1) )*(z1 -zp (2) ); h1 = limit (F1 ,z1 ,zp (1) ); disp (h1 , ' h1 [ n]= ' ) h2 = limit (F2 ,z1 ,zp (2) ); disp (h2 , ' h2 [ n]= ' ) h = h1+h2; disp (h, ' h [ n]= ' ) Now, the differences in your script and mine could be because the version of scilab or scimax in which the author programmed that script may not be the lasts ones... I would recommend you to define polynomials with the native scilab functions... scilab has enough functions for polynomials... the script would be: X =poly([0 1],'z','coeff')*poly([-5/6 3],'z','coeff') /(poly([-1/4 1],'z','coeff')*poly([-1/3 1],'z','coeff') ) X1 = denom (X); zp = roots(X1); X1 = z1 *(3* z1 -(5/6) ) /(( z1 -(1/4) )*(z1 -(1/3) )) F1 = X1 *( z1 ^(n -1) )*(z1 -zp (1) ); F2 = X1 *( z1 ^(n -1) )*(z1 -zp (2) ); h1 = limit (F1 ,z1 ,zp (1) ); disp (h1 , ' h1 [ n]= ' ) h2 = limit (F2 ,z1 ,zp (2) ); disp (h2 , ' h2 [ n]= ' ) h = h1+h2; disp (h, ' h [ n]= ' ) and the only function from scimax is the limit command ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
