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From: Dante Plicato <byebyte@gm...>  20090222 23:42:59

Hi all, i just want to have a simple 2bar histogram, and my problem is that i want my axis to be with NONsquared aspect, i.e. the yaxes automatically scaled (and this yet works this way),but the xaxis to be as long as it need to display 2 little bars. Instead i get a squared graph with 2 big bars. I also tried using something like "plt.axis([0,1,0,mymax*1.2])", changing the second value, but this affects the scale and NOT my picture aspect ratio. This is my simploe source: import numpy as np import matplotlib import matplotlib.pyplot as plt N = 1 ind = np.arange(N) width = 0.05 rects2 = plt.bar(ind+width, 100, width, color='g') rects1 = plt.bar(ind, 200, width, color='b') I tried many things, figsize, axis.. i have no idea, probably because i'm new to matplotlib programming Thank you very much for any help, my best 
From: Eric Firing <efiring@ha...>  20090223 02:12:48

Dante Plicato wrote: > Hi all, > i just want to have a simple 2bar histogram, > and my problem is that i want my axis to be with NONsquared aspect, > i.e. the yaxes automatically scaled (and this yet works this way),but > the xaxis to be as long as it need to display 2 little bars. > Instead i get a squared graph with 2 big bars. > I also tried using something like "plt.axis([0,1,0,mymax*1.2])", > changing the second value, but this affects the scale and NOT my > picture aspect ratio. I'm sorry; I haven't been able to figure out what you want the plot to look like, and I suspect others on the list may be having the same problem. When you describe the bars as "big" or "little", are you referring to width? Height? spacing? When I run your script, I don't see anything that I would describe as "squared aspect". What physical dimensions would you like the axes to have, and what physical dimensions would you like the bars to have? Maybe you can make a sketch using characters to show what you want the plot to look like, e.g., ___________________    ____     ____         Also, is there a reason you are using two calls to "bar" instead of one? Note that arguments such as color can be sequences. Eric > > > This is my simploe source: > > import numpy as np > import matplotlib > import matplotlib.pyplot as plt > > N = 1 > ind = np.arange(N) > width = 0.05 > > rects2 = plt.bar(ind+width, 100, width, color='g') > rects1 = plt.bar(ind, 200, width, color='b') > > I tried many things, figsize, axis.. i have no idea, > probably because i'm new to matplotlib programming > > Thank you very much for any help, > my best > >  > Open Source Business Conference (OSBC), March 2425, 2009, San Francisco, CA > OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise > Strategies to boost innovation and cut costs with open source participation > Receive a $600 discount off the registration fee with the source code: SFAD > http://p.sf.net/sfu/XcvMzF8H > _______________________________________________ > Matplotlibusers mailing list > Matplotlibusers@... > https://lists.sourceforge.net/lists/listinfo/matplotlibusers 
From: Dante Plicato <byebyte@gm...>  20090223 02:44:03

Hi Eric, first of all thank you for your reply. My problem is so simple that it is diffucult to explain :) may be pictures speak better than me. Let me show you 2 simple pictures and you'll understand: this is what i want to do: (done with excel) http://89.96.100.40/~dante/wish.png (2 simple bars centered in a short enough x axis) and this is what i have with matplotlib: http://89.96.100.40/~dante/hist.png Thank you again for your time, dp 2009/2/23 Eric Firing <efiring@...>: > Dante Plicato wrote: >> >> Hi all, >> i just want to have a simple 2bar histogram, >> and my problem is that i want my axis to be with NONsquared aspect, >> i.e. the yaxes automatically scaled (and this yet works this way),but >> the xaxis to be as long as it need to display 2 little bars. >> Instead i get a squared graph with 2 big bars. >> I also tried using something like "plt.axis([0,1,0,mymax*1.2])", >> changing the second value, but this affects the scale and NOT my >> picture aspect ratio. > > I'm sorry; I haven't been able to figure out what you want the plot to look > like, and I suspect others on the list may be having the same problem. > > When you describe the bars as "big" or "little", are you referring to width? > Height? spacing? > > When I run your script, I don't see anything that I would describe as > "squared aspect". What physical dimensions would you like the axes to have, > and what physical dimensions would you like the bars to have? > > Maybe you can make a sketch using characters to show what you > want the plot to look like, e.g., > > ___________________ >   >  ____  >    ____  >       >  > > Also, is there a reason you are using two calls to "bar" instead of one? > Note that arguments such as color can be sequences. > > Eric > >> >> >> This is my simploe source: >> >> import numpy as np >> import matplotlib >> import matplotlib.pyplot as plt >> >> N = 1 >> ind = np.arange(N) >> width = 0.05 >> >> rects2 = plt.bar(ind+width, 100, width, color='g') >> rects1 = plt.bar(ind, 200, width, color='b') >> >> I tried many things, figsize, axis.. i have no idea, >> probably because i'm new to matplotlib programming >> >> Thank you very much for any help, >> my best >> >> >>  >> Open Source Business Conference (OSBC), March 2425, 2009, San Francisco, >> CA >> OSBC tackles the biggest issue in open source: Open Sourcing the >> Enterprise >> Strategies to boost innovation and cut costs with open source >> participation >> Receive a $600 discount off the registration fee with the source code: >> SFAD >> http://p.sf.net/sfu/XcvMzF8H >> _______________________________________________ >> Matplotlibusers mailing list >> Matplotlibusers@... >> https://lists.sourceforge.net/lists/listinfo/matplotlibusers > > 
From: Eric Firing <efiring@ha...>  20090223 19:49:35

Dante Plicato wrote: > Hi Eric, > first of all thank you for your reply. > My problem is so simple that it is diffucult to explain :) > may be pictures speak better than me. > Let me show you 2 simple pictures and you'll understand: > > this is what i want to do: (done with excel) > http://89.96.100.40/~dante/wish.png > (2 simple bars centered in a short enough x axis) > > and this is what i have with matplotlib: > http://89.96.100.40/~dante/hist.png That's very helpful. Using mpl from svn, I get quite a different result, and much closer to what you want. What version of mpl are you using? Can you update to the latest release, or to svn? I think that if you do that, and use the bar examples included with mpl, you will be able to get the desired result. Eric > > Thank you again for your time, > dp > > > 2009/2/23 Eric Firing <efiring@...>: >> Dante Plicato wrote: >>> Hi all, >>> i just want to have a simple 2bar histogram, >>> and my problem is that i want my axis to be with NONsquared aspect, >>> i.e. the yaxes automatically scaled (and this yet works this way),but >>> the xaxis to be as long as it need to display 2 little bars. >>> Instead i get a squared graph with 2 big bars. >>> I also tried using something like "plt.axis([0,1,0,mymax*1.2])", >>> changing the second value, but this affects the scale and NOT my >>> picture aspect ratio. >> I'm sorry; I haven't been able to figure out what you want the plot to look >> like, and I suspect others on the list may be having the same problem. >> >> When you describe the bars as "big" or "little", are you referring to width? >> Height? spacing? >> >> When I run your script, I don't see anything that I would describe as >> "squared aspect". What physical dimensions would you like the axes to have, >> and what physical dimensions would you like the bars to have? >> >> Maybe you can make a sketch using characters to show what you >> want the plot to look like, e.g., >> >> ___________________ >>   >>  ____  >>    ____  >>       >>  >> >> Also, is there a reason you are using two calls to "bar" instead of one? >> Note that arguments such as color can be sequences. >> >> Eric >> >>> >>> This is my simploe source: >>> >>> import numpy as np >>> import matplotlib >>> import matplotlib.pyplot as plt >>> >>> N = 1 >>> ind = np.arange(N) >>> width = 0.05 >>> >>> rects2 = plt.bar(ind+width, 100, width, color='g') >>> rects1 = plt.bar(ind, 200, width, color='b') >>> >>> I tried many things, figsize, axis.. i have no idea, >>> probably because i'm new to matplotlib programming >>> >>> Thank you very much for any help, >>> my best >>> 