I believe Ingo’s solution is closest to what Guillermo was asking for, though Zaki’s idea may offer a different approach to whatever Guillermo’s actual problem is.
This is also a function that would be useful in a couple of places in PDL::LinearAlgebra. What do people think of a new PDL::Primitive::ismembertol (named after the MATLAB function), which you could use here like: $pdl *= !$pdl->ismembertol(0, $epsilon); # still three operations: ismembertol, not, mult And/or “tol0” which could be used like this: $pdl->inplace->tol0($epsilon); # one operation Does that seem like a good idea, and/or the correct names for these? Best regards, Ed From: Ingo Schmid<mailto:ingo...@gmx.at> Sent: 05 May 2022 16:30 To: pdl-general@lists.sourceforge.net<mailto:pdl-general@lists.sourceforge.net> Subject: Re: [Pdl-general] [Pdl-devel] replace very small numbers HI, Use the comparison operator to create a mask and multiply it onto your data. $gr= abs (grandom (5,5)) p $gr*($gr>0.1) [ [ 1.1689305 1.2499314 0.71939273 0 0.73171201] [0.31795298 1.0656512 0.32072078 0.58750721 0.36339994] [ 0 2.0256596 1.1261147 1.0729967 1.7958531] [0.28044179 0.45181403 1.3248066 0.97292087 0.29573919] [ 0 0.29361551 1.0373939 0.25552433 0.10957606] Ingo On 5/5/22 17:21, Zakariyya Mughal wrote: On 2022-05-05 at 10:57:53 -0300, Guillermo P. Ortiz wrote: Hello, somebody know if there are a quick way to set all very small number to zero into a ndarray? Hello, If I understand correctly, I believe that you can achieve this using the `where` function <https://metacpan.org/pod/PDL::Primitive#where><https://metacpan.org/pod/PDL::Primitive#where> to create a mask. Cheers, - Zaki Mughal Regards -- Dr. Guillermo P. Ortiz Electromagnetismo Aplicado Dto. Física, Facultad de Ciencias Exactas Universidad Nacional del Nordeste Avda Libertad 5460, W3404AAS Corrientes, Argentina. (+54) 379-4424678 interno 4613 gortiz* at *unne edu ar _______________________________________________ pdl-devel mailing list pdl-de...@lists.sourceforge.net<mailto:pdl-de...@lists.sourceforge.net> https://lists.sourceforge.net/lists/listinfo/pdl-devel _______________________________________________ pdl-general mailing list pdl-general@lists.sourceforge.net<mailto:pdl-general@lists.sourceforge.net> https://lists.sourceforge.net/lists/listinfo/pdl-general
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