Dear Tan Chin Luh! Thank you very much. It works as expected! The problem is solved.
-- *With best regards,Ph.D., * *associate professor at MPEI <http://mpei.ru/lang/en/Pages/default.aspx>,IEEE member,maintainer of Mathieu functions toolbox for Scilab <http://atoms.scilab.org/toolboxes/Mathieu/>,Nikolay Strelkov.* 2017-04-01 17:23 GMT+03:00 Tan Chin Luh <[email protected]>: > Hi, > > If I understand correctly, you would like to create the filter in Scilab, > and directly access from Xcos? > if so, u could use the syslin object to do so. > > 1. Create the syslin obj > h1 = wfir("lp",2,[.2 0],"re",[0 0]) > h2 = wfir("hp",3,[.1 0],"re",[0 0]) > num1 = poly(h1,'z','coeff') > d = ones(1,size(h1,2)+1) > d(1:$-1) = 0 > den1 = poly(d,'z','coeff') > H1 = syslin('d',num1,den1) > num2 = poly(h2,'z','coeff') > d = ones(1,size(h2,2)+1) > d(1:$-1) = 0 > den2 = poly(d,'z','coeff') > H2 = syslin('d',num2,den2) > > 2. In Xcos > use H1.num in the numerator block for LPF, H1.den in the denominator for > the LPF, same for the HPF. > > Hope this helps. > > rgds, > CL > > > On 1/4/2017 9:53 PM, Nikolay Strelkov wrote: > > Anybody? > Dear Tim, do you have any idea? > > -- > > *With best regards, Ph.D., * > > > *associate professor at MPEI <http://mpei.ru/lang/en/Pages/default.aspx>, > IEEE member, maintainer of Mathieu functions toolbox for Scilab > <http://atoms.scilab.org/toolboxes/Mathieu/>, Nikolay Strelkov.* > > 2017-03-23 14:27 GMT+03:00 Nikolay Strelkov <[email protected]>: > >> Dear all! >> >> I'm playing with simple digital filtering in Xcos 5.5.2. >> I have two filters - low-pass and high-pass, connected in series. >> >> Xcos does not have convolution block. >> So I write FIR transfer function >> <https://ccrma.stanford.edu/%7Ejos/fp/FIR_Transfer_Function.html> >> manually from impulse response function. >> I get impulse response functions from wfir function. >> >> Let's assume that we have two simple filters with impulse responses: >> h1 = [0.3741957 0.3741957]; // it's low-pass filter from h1 = >> wfir("lp",2,[.2 0],"re",[0 0]) >> and >> h2 = [- 0.1870979 0.8 - 0.1870979]; // it's high-pass filter h2 = >> wfir("hp",3,[.1 0],"re",[0 0]) >> >> I convert them to DLR <https://help.scilab.org/docs/5.5.2/en_US/DLR.html> >> SISOs and get: >> H1(z) = 0.3741957*z^-1 + 0.3741957*z^-2 = ( 0.3741957*z + 0.3741957 ) / >> (z^2); >> H2(z) = -0.1870979*z^-1 + 0.8*z^-2 - 0.1870979*z^-3 = ( -0.1870979*z^2 + >> 0.8*z - 0.1870979*z ) / (z^3); >> and place their numerator and denominator to the corresponding DLR blocks. >> Model is in attachment. It's an illustration, not real world example. >> >> I have a question. How I can automate the aforementioned process >> programmatically? >> I tried to create numerator and denominator with poly function and as >> strings, but Xcos does not support these types in DLR settings. >> >> -- >> >> >> >> >> *With best regards, Ph.D., assistant professor at MPEI >> <http://mpei.ru/lang/en/Pages/default.aspx>, IEEE member, maintainer of >> Mathieu functions toolbox for Scilab >> <http://atoms.scilab.org/toolboxes/Mathieu/>, Nikolay Strelkov.* >> > > > > _______________________________________________ > users mailing > [email protected]http://lists.scilab.org/mailman/listinfo/users > > > > _______________________________________________ > users mailing list > [email protected] > http://lists.scilab.org/mailman/listinfo/users > >
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