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POMatplotlib - Float to HH:MM
 

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  1. POMatplotlib - Float to HH:MM
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    <p>Evening all, I'm trying to produce yaxis as HH:MM. I thought using the two below #'d lines would do the trick but they produce the error which can be seen below. Any help greatly appreciated.</p> <pre><code>x = ['23/09/2013', '24/09/2013', '25/09/2013', '26/09/2013', '27/09/2013'] ytemp = ['03:04:54', '03:26:29', '03:41:13', '03:20:07', '01:01:04'] import datetime from matplotlib.dates import date2num, MINUTES_PER_DAY, SEC_PER_DAY, DateFormatter import pylab as p # function: Represent a string time in seconds. def convert(s): h,m,s = map(float, s.split(':')) return h/24. + m/MINUTES_PER_DAY + s/SEC_PER_DAY for i in ytemp: y.append(convert(str(i))) fig = p.figure() ax = fig.add_subplot(111) N = len(y) ind = range(N) ax.bar(ind, y, facecolor='#777777', align='center') #ax.yaxis_date() #ax.yaxis.set_major_formatter(DateFormatter('%H:%M')) ax.set_ylabel('Idle Time') ax.set_title(totalidle[1][0],fontstyle='italic') ax.set_xticks(ind) ax.set_xticklabels([x[0], x[1], x[2], x[3], x[4]]) fig.autofmt_xdate() p.show() </code></pre> <p>y is [0.12840277777777775, 0.1433912037037037, 0.15362268518518518, 0.13896990740740742, 0.0424074074074074]</p> <p>the error is:</p> <pre class="lang-none prettyprint-override"><code>Exception in Tkinter callback Traceback (most recent call last): File "C:\Python33\lib\tkinter\__init__.py", line 1475, in __call__ return self.func(*args) File "C:\Python33\lib\site-packages\matplotlib\backends\backend_tkagg.py", line 276, in resize self.show() File "C:\Python33\lib\site-packages\matplotlib\backends\backend_tkagg.py", line 348, in draw FigureCanvasAgg.draw(self) File "C:\Pytho Exception in Tkinter callback Traceback (most recent call last): File "C:\Python33\lib\tkinter\__init__.py", line 1475, in __call__ return self.func(*args) File "C:\Python33\lib\site-packages\matplotlib\backends\backend_tkagg.py", line 276, in resize self.show() File "C:\Python33\lib\site-packages\matplotlib\backends\backend_tkagg.py", line 348, in draw FigureCanvasAgg.draw(self) File "C:\Python33\lib\site-packages\matplotlib\backends\backend_agg.py", line 451, in draw self.figure.draw(self.renderer) File "C:\Python33\lib\site-packages\matplotlib\artist.py", line 56, in draw_wrapper draw(artist, renderer, *args, **kwargs) File "C:\Python33\lib\site-packages\matplotlib\figure.py", line 1035, in draw func(*args) File "C:\Python33\lib\site-packages\matplotlib\artist.py", line 56, in draw_wrapper draw(artist, renderer, *args, **kwargs) File "C:\Python33\lib\site-packages\matplotlib\axes.py", line 2088, in draw a.draw(renderer) File "C:\Python33\lib\site-packages\matplotlib\artist.py", line 56, in draw_wrapper draw(artist, renderer, *args, **kwargs) File "C:\Python33\lib\site-packages\matplotlib\axis.py", line 1092, in draw ticks_to_draw = self._update_ticks(renderer) File "C:\Python33\lib\site-packages\matplotlib\axis.py", line 946, in _update_ticks tick_tups = [t for t in self.iter_ticks()] File "C:\Python33\lib\site-packages\matplotlib\axis.py", line 946, in &lt;listcomp&gt; tick_tups = [t for t in self.iter_ticks()] File "C:\Python33\lib\site-packages\matplotlib\axis.py", line 890, in iter_ticks majorLocs = self.major.locator() File "C:\Python33\lib\site-packages\matplotlib\dates.py", line 802, in __call__ self.refresh() File "C:\Python33\lib\site-packages\matplotlib\dates.py", line 819, in refresh dmin, dmax = self.viewlim_to_dt() File "C:\Python33\lib\site-packages\matplotlib\dates.py", line 564, in viewlim_to_dt return num2date(vmin, self.tz), num2date(vmax, self.tz) File "C:\Python33\lib\site-packages\matplotlib\dates.py", line 311, in num2date return _from_ordinalf(x, tz) File "C:\Python33\lib\site-packages\matplotlib\dates.py", line 214, in _from_ordinalf dt = datetime.datetime.fromordinal(ix) ValueError: ordinal must be &gt;= 1n33\lib\site-packages\matplotlib\backends\backend_agg.py", line 451, in draw self.figure.draw(self.renderer) File "C:\Python33\lib\site-packages\matplotlib\artist.py", line 56, in draw_wrapper draw(artist, renderer, *args, **kwargs) File "C:\Python33\lib\site-packages\matplotlib\figure.py", line 1035, in draw func(*args) File "C:\Python33\lib\site-packages\matplotlib\artist.py", line 56, in draw_wrapper draw(artist, renderer, *args, **kwargs) File "C:\Python33\lib\site-packages\matplotlib\axes.py", line 2088, in draw a.draw(renderer) File "C:\Python33\lib\site-packages\matplotlib\artist.py", line 56, in draw_wrapper draw(artist, renderer, *args, **kwargs) File "C:\Python33\lib\site-packages\matplotlib\axis.py", line 1092, in draw ticks_to_draw = self._update_ticks(renderer) File "C:\Python33\lib\site-packages\matplotlib\axis.py", line 946, in _update_ticks tick_tups = [t for t in self.iter_ticks()] File "C:\Python33\lib\site-packages\matplotlib\axis.py", line 946, in &lt;listcomp&gt; tick_tups = [t for t in self.iter_ticks()] File "C:\Python33\lib\site-packages\matplotlib\axis.py", line 890, in iter_ticks majorLocs = self.major.locator() File "C:\Python33\lib\site-packages\matplotlib\dates.py", line 802, in __call__ self.refresh() File "C:\Python33\lib\site-packages\matplotlib\dates.py", line 819, in refresh dmin, dmax = self.viewlim_to_dt() File "C:\Python33\lib\site-packages\matplotlib\dates.py", line 564, in viewlim_to_dt return num2date(vmin, self.tz), num2date(vmax, self.tz) File "C:\Python33\lib\site-packages\matplotlib\dates.py", line 311, in num2date return _from_ordinalf(x, tz) File "C:\Python33\lib\site-packages\matplotlib\dates.py", line 214, in _from_ordinalf dt = datetime.datetime.fromordinal(ix) ValueError: ordinal must be &gt;= 1 </code></pre> <hr>
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