Re: [julia-users] b images
Ok!! That's work! Thank you for your help!!!
Emerson
Em terça-feira, 6 de setembro de 2016 13:26:47 UTC-3, El suisse escreveu:
>
> yeah sorry for the noise read fast your question . If you want a Binary
> Image given a thresold value:
> img_bin = img_gray .<= value
>
>
> 2016-09-06 13:12 GMT-03:00 Emerson Vitor Castelani <emerso...@gmail.com
> >:
>
>> Hi El suisse ! Thank you for your help. I already tried that. But in
>> this case, we obtain a gray scaled image...I want a binary image...
>>
>> Em terça-feira, 6 de setembro de 2016 11:39:31 UTC-3, El suisse escreveu:
>>>
>>> I think with:
>>> img = load("path/to/your/image")
>>> img_bw = convert(Image{ColorTypes.Gray}, img)
>>>
>>>
>>> 2016-09-06 9:46 GMT-03:00 Emerson Vitor Castelani <emerso...@gmail.com>:
>>>
>>>> Is there any way to convert a jpg (or png) image in b using
>>>> Images.jl?
>>>>
>>>> Thanks
>>>>
>>>
>>>
>
Re: [julia-users] b images
Hi El suisse ! Thank you for your help. I already tried that. But in this
case, we obtain a gray scaled image...I want a binary image...
Em terça-feira, 6 de setembro de 2016 11:39:31 UTC-3, El suisse escreveu:
>
> I think with:
> img = load("path/to/your/image")
> img_bw = convert(Image{ColorTypes.Gray}, img)
>
>
> 2016-09-06 9:46 GMT-03:00 Emerson Vitor Castelani <emerso...@gmail.com
> >:
>
>> Is there any way to convert a jpg (or png) image in b using Images.jl?
>>
>> Thanks
>>
>
>
[julia-users] b images
Is there any way to convert a jpg (or png) image in b using Images.jl? Thanks
[julia-users] Escher problem
I am trying run Escher's examples but I had some problems. For example, in minesweeper.jl, is showed just the word minesweeper and nothing more... Someone knows why?
Re: [julia-users] mouse event
In the first moment I would like to click and get the coordinates of the point. Next, draw a (small) circle representing this point. Em quinta-feira, 23 de julho de 2015 05:55:16 UTC-3, Andreas Lobinger escreveu: Can you describe, what you want to do?
Re: [julia-users] mouse event
Do you recommend another way to get mouse events (without using pyplot)? Em quarta-feira, 22 de julho de 2015 14:40:53 UTC-3, Isaiah escreveu: Ok, this appears to be a known limitation right now. https://github.com/stevengj/PyPlot.jl/issues/21 On Wed, Jul 22, 2015 at 1:28 PM, Emerson Vitor Castelani emerso...@gmail.com javascript: wrote: Code: using PyPlot using PyCall @pyimport matplotlib as plt fig = plt.gcf() function onclick(event) println(down, event) end cid_up=fig[:canvas][:mpl_connect](button_press_event,onclick) plot.show() Error: PyError (:PyObject_Call) type 'exceptions.TypeError' TypeError(cannot create weak reference to 'PyCall.jl_Function' object,) File /usr/lib64/python2.7/site-packages/matplotlib/backend_bases.py, line 2316, in mpl_connect return self.callbacks.connect(s, func) File /usr/lib64/python2.7/site-packages/matplotlib/cbook.py, line 506, in connect self._func_cid_map[s][func] = cid File /usr/lib64/python2.7/weakref.py, line 321, in __setitem__ self.data[ref(key, self._remove)] = value while loading In[5], in expression starting on line 1 in pyerr_check at /home/emerson/.julia/v0.3/PyCall/src/exception.jl:60 in pycall at /home/emerson/.julia/v0.3/PyCall/src/PyCall.jl:92 in fn at /home/emerson/.julia/v0.3/PyCall/src/conversions.jl:188 Thanks Em terça-feira, 21 de julho de 2015 16:23:30 UTC-3, Isaiah escreveu: Please describe what you tried and what was the error. You may need to either 1) yield the event loop 2) make sure the program stays open long enough to actually display your plot (ref: https://github.com/stevengj/PyPlot.jl/issues/41) On Tue, Jul 21, 2015 at 2:53 PM, Emerson Vitor Castelani emerso...@gmail.com wrote: I had a similar problem...I don't know why... Em terça-feira, 21 de julho de 2015 14:46:41 UTC-3, El suisse escreveu: Hi I got the following example related with this thread https://gist.github.com/elsuizo/5338605a6a5c7ab54730 but fail in https://gist.github.com/elsuizo/5338605a6a5c7ab54730#file-phase_portrait_mouse_event-jl-L114 and I do not know why This is the python code which comes: https://gist.github.com/elsuizo/6957889d8e63e9029377
Re: [julia-users] mouse event
Code: using PyPlot using PyCall @pyimport matplotlib as plt fig = plt.gcf() function onclick(event) println(down, event) end cid_up=fig[:canvas][:mpl_connect](button_press_event,onclick) plot.show() Error: PyError (:PyObject_Call) type 'exceptions.TypeError' TypeError(cannot create weak reference to 'PyCall.jl_Function' object,) File /usr/lib64/python2.7/site-packages/matplotlib/backend_bases.py, line 2316, in mpl_connect return self.callbacks.connect(s, func) File /usr/lib64/python2.7/site-packages/matplotlib/cbook.py, line 506, in connect self._func_cid_map[s][func] = cid File /usr/lib64/python2.7/weakref.py, line 321, in __setitem__ self.data[ref(key, self._remove)] = value while loading In[5], in expression starting on line 1 in pyerr_check at /home/emerson/.julia/v0.3/PyCall/src/exception.jl:60 in pycall at /home/emerson/.julia/v0.3/PyCall/src/PyCall.jl:92 in fn at /home/emerson/.julia/v0.3/PyCall/src/conversions.jl:188 Thanks Em terça-feira, 21 de julho de 2015 16:23:30 UTC-3, Isaiah escreveu: Please describe what you tried and what was the error. You may need to either 1) yield the event loop 2) make sure the program stays open long enough to actually display your plot (ref: https://github.com/stevengj/PyPlot.jl/issues/41) On Tue, Jul 21, 2015 at 2:53 PM, Emerson Vitor Castelani emerso...@gmail.com javascript: wrote: I had a similar problem...I don't know why... Em terça-feira, 21 de julho de 2015 14:46:41 UTC-3, El suisse escreveu: Hi I got the following example related with this thread https://gist.github.com/elsuizo/5338605a6a5c7ab54730 but fail in https://gist.github.com/elsuizo/5338605a6a5c7ab54730#file-phase_portrait_mouse_event-jl-L114 and I do not know why This is the python code which comes: https://gist.github.com/elsuizo/6957889d8e63e9029377
[julia-users] mouse event
Guys, I need to know if we can create mouse events using pyplot in Julia? And how? Thanks
Re: [julia-users] mouse event
Well, I already tried this , but I don't get to do work!Does canvas and mpl_connect work in Julia? Em terça-feira, 21 de julho de 2015 13:38:06 UTC-3, Isaiah escreveu: http://matplotlib.org/users/event_handling.html On Tue, Jul 21, 2015 at 12:34 PM, Emerson Vitor Castelani emerso...@gmail.com javascript: wrote: Guys, I need to know if we can create mouse events using pyplot in Julia? And how? Thanks
Re: [julia-users] mouse event
I had a similar problem...I don't know why... Em terça-feira, 21 de julho de 2015 14:46:41 UTC-3, El suisse escreveu: Hi I got the following example related with this thread https://gist.github.com/elsuizo/5338605a6a5c7ab54730 but fail in https://gist.github.com/elsuizo/5338605a6a5c7ab54730#file-phase_portrait_mouse_event-jl-L114 and I do not know why This is the python code which comes: https://gist.github.com/elsuizo/6957889d8e63e9029377
Re: [julia-users] simplex in Julia is very slow
Hi Stefan. I am very grateful by your attention. Each variable typed correctly doesn't change the perfomance. Do you have other suggestion to me? Thanks, -Emerson Em quarta-feira, 26 de novembro de 2014 17h52min57s UTC-2, Stefan Karpinski escreveu: I wonder if \ might be type unstable. On Wed, Nov 26, 2014 at 2:49 PM, Stefan Karpinski ste...@karpinski.org javascript: wrote: It turns out that doesn't actually matter but there are other unrelated ill-typed variables in the code: Xb, o, y, r, e, Nj, ind, q, t I haven't determined why this is happening, but something is ill-typed here. On Wed, Nov 26, 2014 at 1:20 PM, Tim Holy tim@gmail.com javascript: wrote: Stefan's point is more relevant than you realize; if the type of the variable is uncertain, the loop will be very slow. You can make that resize operation a separate function, from which you call your main routine. --Tim On Wednesday, November 26, 2014 09:26:35 AM Emerson Vitor Castelani wrote: Humm, It's useful but I guess that the problem is something in loop while... Em quarta-feira, 26 de novembro de 2014 15h05min03s UTC-2, Stefan Karpinski escreveu: I'm not sure if this is the problem, but changing the type of a variable in a function body causes problems for type inference. For that reason, the first two lines of this code may cause performance issue if you call this with b and c as matrices. A more Julian idiom for this is to do something like this: function simplex(A::Matrix, b::Vector, c::Vector) (m,n) = size(A); ... end simplex(A::Matrix, b::Matrix, c::Matrix) = simplex(A, vec(b), vec(c)) This also avoids copying the data of b and c needlessly. On Wednesday, November 26, 2014, Emerson Vitor Castelani emerso...@gmail.com javascript: wrote: Have you considered the example scsd8.mat? Em quarta-feira, 26 de novembro de 2014 14h39min14s UTC-2, Pileas escreveu: Result with tic() toc() at the very beginning and at the very end: elapsed time: 0.025719973 seconds Τη Τετάρτη, 26 Νοεμβρίου 2014 11:06:26 π.μ. UTC-5, ο χρήστης Emerson Vitor Castelani έγραψε: Well, I am tried to implement a simple version of simplex in Julia and I have had some troubles. In Julia, my algorithm spends about 30 sec and in matlab/octave 3 sec for the same problem. So, I saw some tips in order to get a better performance but the best that I got in Julia was 17-20 sec. The codes are in attachment. I am new in Julia and the algorithms are little roughly implemented but they are very similar. Thanks
Re: [julia-users] simplex in Julia is very slow
Ok! Thank you, Emerson Em sexta-feira, 28 de novembro de 2014 16h06min10s UTC-2, Stefan Karpinski escreveu: Something is going on with the type inference of backslash, e.g. see (@code_typed rand(3,3)\rand(3))[1].args[3] But I can't figure out what. Issue filed: https://github.com/JuliaLang/julia/issues/9191. On Fri, Nov 28, 2014 at 11:51 AM, Emerson Vitor Castelani emerso...@gmail.com javascript: wrote: Hi Stefan. I am very grateful by your attention. Each variable typed correctly doesn't change the perfomance. Do you have other suggestion to me? Thanks, -Emerson Em quarta-feira, 26 de novembro de 2014 17h52min57s UTC-2, Stefan Karpinski escreveu: I wonder if \ might be type unstable. On Wed, Nov 26, 2014 at 2:49 PM, Stefan Karpinski ste...@karpinski.org wrote: It turns out that doesn't actually matter but there are other unrelated ill-typed variables in the code: Xb, o, y, r, e, Nj, ind, q, t I haven't determined why this is happening, but something is ill-typed here. On Wed, Nov 26, 2014 at 1:20 PM, Tim Holy tim@gmail.com wrote: Stefan's point is more relevant than you realize; if the type of the variable is uncertain, the loop will be very slow. You can make that resize operation a separate function, from which you call your main routine. --Tim On Wednesday, November 26, 2014 09:26:35 AM Emerson Vitor Castelani wrote: Humm, It's useful but I guess that the problem is something in loop while... Em quarta-feira, 26 de novembro de 2014 15h05min03s UTC-2, Stefan Karpinski escreveu: I'm not sure if this is the problem, but changing the type of a variable in a function body causes problems for type inference. For that reason, the first two lines of this code may cause performance issue if you call this with b and c as matrices. A more Julian idiom for this is to do something like this: function simplex(A::Matrix, b::Vector, c::Vector) (m,n) = size(A); ... end simplex(A::Matrix, b::Matrix, c::Matrix) = simplex(A, vec(b), vec(c)) This also avoids copying the data of b and c needlessly. On Wednesday, November 26, 2014, Emerson Vitor Castelani emerso...@gmail.com javascript: wrote: Have you considered the example scsd8.mat? Em quarta-feira, 26 de novembro de 2014 14h39min14s UTC-2, Pileas escreveu: Result with tic() toc() at the very beginning and at the very end: elapsed time: 0.025719973 seconds Τη Τετάρτη, 26 Νοεμβρίου 2014 11:06:26 π.μ. UTC-5, ο χρήστης Emerson Vitor Castelani έγραψε: Well, I am tried to implement a simple version of simplex in Julia and I have had some troubles. In Julia, my algorithm spends about 30 sec and in matlab/octave 3 sec for the same problem. So, I saw some tips in order to get a better performance but the best that I got in Julia was 17-20 sec. The codes are in attachment. I am new in Julia and the algorithms are little roughly implemented but they are very similar. Thanks
Re: [julia-users] simplex in Julia is very slow
In my test, I change the code and define Xb::Vector, o::Vector,... etc but the result doesn't change. Is there some special way to define them? Regards Em quarta-feira, 26 de novembro de 2014 17h50min04s UTC-2, Stefan Karpinski escreveu: It turns out that doesn't actually matter but there are other unrelated ill-typed variables in the code: Xb, o, y, r, e, Nj, ind, q, t I haven't determined why this is happening, but something is ill-typed here. On Wed, Nov 26, 2014 at 1:20 PM, Tim Holy tim@gmail.com javascript: wrote: Stefan's point is more relevant than you realize; if the type of the variable is uncertain, the loop will be very slow. You can make that resize operation a separate function, from which you call your main routine. --Tim On Wednesday, November 26, 2014 09:26:35 AM Emerson Vitor Castelani wrote: Humm, It's useful but I guess that the problem is something in loop while... Em quarta-feira, 26 de novembro de 2014 15h05min03s UTC-2, Stefan Karpinski escreveu: I'm not sure if this is the problem, but changing the type of a variable in a function body causes problems for type inference. For that reason, the first two lines of this code may cause performance issue if you call this with b and c as matrices. A more Julian idiom for this is to do something like this: function simplex(A::Matrix, b::Vector, c::Vector) (m,n) = size(A); ... end simplex(A::Matrix, b::Matrix, c::Matrix) = simplex(A, vec(b), vec(c)) This also avoids copying the data of b and c needlessly. On Wednesday, November 26, 2014, Emerson Vitor Castelani emerso...@gmail.com javascript: wrote: Have you considered the example scsd8.mat? Em quarta-feira, 26 de novembro de 2014 14h39min14s UTC-2, Pileas escreveu: Result with tic() toc() at the very beginning and at the very end: elapsed time: 0.025719973 seconds Τη Τετάρτη, 26 Νοεμβρίου 2014 11:06:26 π.μ. UTC-5, ο χρήστης Emerson Vitor Castelani έγραψε: Well, I am tried to implement a simple version of simplex in Julia and I have had some troubles. In Julia, my algorithm spends about 30 sec and in matlab/octave 3 sec for the same problem. So, I saw some tips in order to get a better performance but the best that I got in Julia was 17-20 sec. The codes are in attachment. I am new in Julia and the algorithms are little roughly implemented but they are very similar. Thanks
[julia-users] Re: simplex in Julia is very slow
Have you considered the example scsd8.mat? Em quarta-feira, 26 de novembro de 2014 14h39min14s UTC-2, Pileas escreveu: Result with tic() toc() at the very beginning and at the very end: elapsed time: 0.025719973 seconds Τη Τετάρτη, 26 Νοεμβρίου 2014 11:06:26 π.μ. UTC-5, ο χρήστης Emerson Vitor Castelani έγραψε: Well, I am tried to implement a simple version of simplex in Julia and I have had some troubles. In Julia, my algorithm spends about 30 sec and in matlab/octave 3 sec for the same problem. So, I saw some tips in order to get a better performance but the best that I got in Julia was 17-20 sec. The codes are in attachment. I am new in Julia and the algorithms are little roughly implemented but they are very similar. Thanks
Re: [julia-users] simplex in Julia is very slow
Humm, It's useful but I guess that the problem is something in loop while... Em quarta-feira, 26 de novembro de 2014 15h05min03s UTC-2, Stefan Karpinski escreveu: I'm not sure if this is the problem, but changing the type of a variable in a function body causes problems for type inference. For that reason, the first two lines of this code may cause performance issue if you call this with b and c as matrices. A more Julian idiom for this is to do something like this: function simplex(A::Matrix, b::Vector, c::Vector) (m,n) = size(A); ... end simplex(A::Matrix, b::Matrix, c::Matrix) = simplex(A, vec(b), vec(c)) This also avoids copying the data of b and c needlessly. On Wednesday, November 26, 2014, Emerson Vitor Castelani emerso...@gmail.com javascript: wrote: Have you considered the example scsd8.mat? Em quarta-feira, 26 de novembro de 2014 14h39min14s UTC-2, Pileas escreveu: Result with tic() toc() at the very beginning and at the very end: elapsed time: 0.025719973 seconds Τη Τετάρτη, 26 Νοεμβρίου 2014 11:06:26 π.μ. UTC-5, ο χρήστης Emerson Vitor Castelani έγραψε: Well, I am tried to implement a simple version of simplex in Julia and I have had some troubles. In Julia, my algorithm spends about 30 sec and in matlab/octave 3 sec for the same problem. So, I saw some tips in order to get a better performance but the best that I got in Julia was 17-20 sec. The codes are in attachment. I am new in Julia and the algorithms are little roughly implemented but they are very similar. Thanks
