Re: [julia-users] Subtraction of the diagonal matrix, how sipler?
I think so, but it neither take long time julia> let A = rand(4,4); @time for i = 1:10^6;A - 5.0*eye(4);end end; elapsed time: 0.177621144 seconds (534 MB allocated, 5.71% gc time in 25 pauses with 0 full sweep) julia> let A = rand(4,4); @time for i = 1:10^6;A - 5.0*I;end end; elapsed time: 0.053749097 seconds (167 MB allocated, 5.04% gc time in 8 pauses with 0 full sweep) 2015-02-01 11:49 GMT-05:00 paul analyst : > Thx, nice. Is the fast way in Julia ? > Paul > > W dniu niedziela, 1 lutego 2015 17:18:03 UTC+1 użytkownik Andreas Noack > napisał: >> >> This is cheaper: rand(4,4) - 5*I because 5I is a special type that >> doesn't store all elements. >> >> 2015-02-01 11:03 GMT-05:00 paul analyst : >> >>> I have somethink like this : >>> >>> rand(4,4).-eye(4,4)*5 >>> >>> Qestion : how to simpler subtracted from the diagonal value(5) , >>> Without multiplying matrices I have great and I have to simplify >>> the code. >>> >>> Paul >>> >> >>
Re: [julia-users] Subtraction of the diagonal matrix, how sipler?
Thx, nice. Is the fast way in Julia ? Paul W dniu niedziela, 1 lutego 2015 17:18:03 UTC+1 użytkownik Andreas Noack napisał: > > This is cheaper: rand(4,4) - 5*I because 5I is a special type that doesn't > store all elements. > > 2015-02-01 11:03 GMT-05:00 paul analyst > > : > >> I have somethink like this : >> >> rand(4,4).-eye(4,4)*5 >> >> Qestion : how to simpler subtracted from the diagonal value(5) , >> Without multiplying matrices I have great and I have to simplify >> the code. >> >> Paul >> > >
Re: [julia-users] Subtraction of the diagonal matrix, how sipler?
This is cheaper: rand(4,4) - 5*I because 5I is a special type that doesn't store all elements. 2015-02-01 11:03 GMT-05:00 paul analyst : > I have somethink like this : > > rand(4,4).-eye(4,4)*5 > > Qestion : how to simpler subtracted from the diagonal value(5) , > Without multiplying matrices I have great and I have to simplify the > code. > > Paul >
[julia-users] Subtraction of the diagonal matrix, how sipler?
I have somethink like this : rand(4,4).-eye(4,4)*5 Qestion : how to simpler subtracted from the diagonal value(5) , Without multiplying matrices I have great and I have to simplify the code. Paul
