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From: Ryan Neve <ryan.neve@gm...>  20091211 19:34:51
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(sorry if this is a duplicate post) Jae, Thank you for your help. I found the problem. It was caused by using pyplot.title(). It is working better now. I next have to figure out how to do the following within AxesGrid: 1. How to convert the x axis labels from an integer value representing epoch seconds to a nicely formatted date. I think this has something to do with matplotlib.dates.DateFormatter. I hope that this will remove the 1.25325e9 from the plot. 2. How to minimize or eliminate the white bands on the right and bottom of each axes caused by the axis scale exceeding the data values. 3. How to eliminate (or hide) the first major tic label on the y axis (always 0) so it doesn't overlap with the last tick from the previous y axis. It seems like there may be a different way to approach this than with subplot() Regards, Ryan * Here's a complete example:* from matplotlib import pyplot from mpl_toolkits.axes_grid import AxesGrid from numpy import arange, linspace, meshgrid, random, transpose # Generate some data x_dim = linspace(1253250000,1253250000 + 60*60*24,47) # This is epoch seconds y_dim = arange(0,2.7,0.1) z_dim = {} z_dim['chl'] = random.rand(len(x_dim),len(y_dim)) + linspace(5,26,len(y_dim)) z_dim['do'] = random.rand(len(x_dim),len(y_dim)) + linspace(5,10,len(y_dim)) z_dim['turb'] = random.rand(len(x_dim),len(y_dim)) + linspace(4.5,12.5,len(y_dim)) x_grid,y_grid = meshgrid(x_dim,y_dim) x_grid = transpose(x_grid) y_grid = transpose(y_grid) # Start the plotting routines DAP_figure = pyplot.figure(1,(8,8)) #pyplot.title('Title goes here') # *THIS IS THE LINE THAT CAUSES THE EARLIER PROBLEM* pyplot.figtext(0.05,.5,"Depth (m)",rotation='vertical',verticalalignment='center') # Create a grid of axes with the AxesGrid helper class my_grid = AxesGrid(DAP_figure, 111, # Only one grid in DAP_figure nrows_ncols = (3,1), axes_pad = 0.0, #pad between axes in inches aspect=False, #By default (False), widths and heigths of axes in the grid are scaled independently. If True, they are scaled according to their data limits add_all=True, # Add axes to figures if True (default True) share_all=False, # xaxis & yaxis of all axes are shared if True (default False) label_mode = "L", # location of tick labels thaw will be displayed. "1" (only the lower left axes), "L" (left most and bottom most axes), or "all" cbar_location="right", # "right" or "top" cbar_mode="each", # "None","single", or "each" cbar_size="2%", cbar_pad="1%", ) for i,parameter in enumerate(z_dim): ax = my_grid[i].pcolor(x_grid,y_grid,z_dim[parameter]) my_grid[i].set_ylabel(parameter) # Puts a y label on every graph. Eventually we want this labeled only once. my_grid.cbar_axes[i].colorbar(ax) my_grid.cbar_axes[i].axis["right"].toggle(ticklabels=True,label=True) my_grid.cbar_axes[i].set_ylabel("units") my_grid[i].axis["bottom"].major_ticklabels.set_rotation(45) # pyplot.show() [image: p5R5J.png] On Tue, Dec 8, 2009 at 7:39 PM, JaeJoon Lee <lee.j.joon@...> wrote: > > Did you test the code in my previous post? > > If you want to get some help, you need to take your time to create a simple > and complete example (which reproduces the problem) that others can easily > test. > > Since I believe the problem is due to the existence of an extra axes, your > example don't need to show any images. Please post a simple script that > draws a blank AxesGrid and shows extra ticklabels as your current code does. > > Regards, > > JJ > > 
From: JaeJoon Lee <lee.j.joon@gm...>  20091212 06:04:05
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On Fri, Dec 11, 2009 at 2:34 PM, Ryan Neve <ryan.neve@...> wrote: > Thank you for your help. I found the problem. It was caused by using > pyplot.title(). It is working better now. > I next have to figure out how to do the following within AxesGrid: > > 1. How to convert the x axis labels from an integer value representing > epoch seconds to a nicely formatted date. I think this has something to do > with matplotlib.dates.DateFormatter. I hope that this will remove the > 1.25325e9 from the plot. > > 2. How to minimize or eliminate the white bands on the right and bottom > of each axes caused by the axis scale exceeding the data values. > > 3. How to eliminate (or hide) the first major tic label on the y axis > (always 0) so it doesn't overlap with the last tick from the previous y > axis. > > It seems like there may be a different way to approach this than with > subplot() > While there are certain differences, most of the usual matplotlib command supposed to work. So, I recommend you to read the matplotlib documentation first. 1. There are lots of examples in the gallery. Please take a look. 2. see the code below. 3. this kind of thing is difficult to do with axes_grid toolkit. but see below. First, you need to change the xvalues to date (not seconds). Then, add the code below inside your for loop. Other than ax.axis["bottom"].. thing, these are just normal matplotlib command. Also, I should have mentioned it earlier, but I don't see any need of axes_grid toolkit in your code. You'd better simply use subplot, which is recommended if you're not familiar with matplotlib. Regards, JJ ax = my_grid[i] ax.autoscale_view(tight=True) # adjust xlim and ylim # you can manually call ax.set_xlim and ax.set_ylim. ax.xaxis_date() # tick format as date and time ax.axis["bottom"].major_ticklabels.set_rotation(30) ax.axis["bottom"].major_ticklabels.set_ha("right") ax.axis["bottom"].major_ticklabels.set_va("top") # with axes_grid toolkit, it is difficult to make a certain # ticklabel invisible (without disabling the tick line). The # below line of code slightly adjust the ylim so that y=0 ticks # are not shown ax.set_ylim(ymax=0.001) 