per freem wrote: > hi all, > > please disregard the previous email - i had a mistake in my file that > did not do the casting properly when loading the data. > > i managed to plot my data, but this time i am having a problem with the > 'bar' function. > > when i plot using: > > x = data[:, 0] > y = data[:, 1] > bar(x,y) > > i get the attached figure. the bar graphs are way too thin and don't > look like bar graphs at all. i see in the gallery many examples of bars > with greater width, e.g. > http://matplotlib.sourceforge.net/examples/api/histogram_demo.html > > but all of these seem to be made using the 'hist' function. i just want > the bar width to be greater. my setting of the width= does not make a > difference, it treats: > > bar(x,y,width=1.5) > bar(x,y,width=10) > etc.
Width is in the same units as x, and it looks like your range of x values is 1e8, so maybe your width needs to be something like 1e7, not 10. Eric > > as the same, yielding this line plot. if i remove some data points (and > plot x and y's that are only, say, 3 in length) then the bars look normal. > > how can i make the bar widths greater in this case? > > On Sun, Mar 1, 2009 at 11:41 AM, per freem <perfr...@gmail.com > <mailto:perfr...@gmail.com>> wrote: > > hi all, > > i am reading a set of tab-separated data from a file and i want to > put it into an array, and then plot some of the columns. i know the > number of columns ahead of time but not the number of rows. i load > the array from the file as follows, which seems to work: > > data = [] > for line in myfile: > field1, field2, field3 = line.strip().split('\t') > data.append([int(field1), int(field2), int(field3)]) > > i then convert it into an array as follows: > > data = array(data) > > i am able to reference the first column as follows: > > data[:,0] > > but if i try to plot the first column against the second as follows: > > bar(data[:,0],data[:,1]) > > then i get the error: > > /usr/lib64/python2.5/site-packages/matplotlib/units.pyc in > get_converter(self, x) > 128 converter = self.get(classx) > 129 > --> 130 if converter is None and iterable(x): > 131 # if this is anything but an object array, we'll > assume > 132 # there are no custom units > > [repeated many times] > > RuntimeError: maximum recursion depth exceeded > WARNING: Failure executing file: <myfile.py> > > how can i fix this? i'd like an n-by-m representation of my data as > an array which i can reference like a matrix in matlab. some of the > columns are floats, other are ints, and others are strings, so i > prefer to load the data into an array as a loop where i can cast the > strings appropriately, rather than use some built in io function for > reading tab-separated data. > > thank you very much. > > > > ------------------------------------------------------------------------ > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------------ > Open Source Business Conference (OSBC), March 24-25, 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 > > > ------------------------------------------------------------------------ > > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 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 _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
