Plot a bar using matplotlib using a dictionary

Question

Is there any way to plot a bar plot using matplotlib using data directly from a dict    My dict looks like this    D    u Label1  26  u Label2   17  u Label3  30    I was expecting   fig   plt figure figsize  5 5 3  dpi 300  ax   fig add subplot 111  bar   ax bar D range 1 len D  1 1  0 5    to work  but it does not    Here is the error    gt  gt  gt  ax bar D range 1 len D  1 1  0 5  Traceback  most recent call last     File   lt stdin gt    line 1  in  lt module gt    File   usr local lib python2 7 site-packages matplotlib axes py   line 4904  in bar     self add patch r    File   usr local lib python2 7 site-packages matplotlib axes py   line 1570  in add patch     self  update patch limits p    File   usr local lib python2 7 site-packages matplotlib axes py   line 1588  in  update patch limits     xys   patch get patch transform   transform vertices    File   usr local lib python2 7 site-packages matplotlib patches py   line 580  in get patch transform     self  update patch transform     File   usr local lib python2 7 site-packages matplotlib patches py   line 576  in  update patch transform     bbox   transforms Bbox from bounds x  y  width  height    File   usr local lib python2 7 site-packages matplotlib transforms py   line 786  in from bounds     return Bbox from extents x0  y0  x0   width  y0   height  TypeError  coercing to Unicode  need string or buffer  float found

User · Answer

It s a little simpler than most answers here suggest   import matplotlib pyplot as plt  D    u Label1  26  u Label2   17  u Label3  30  plt bar  zip  D items     plt show

User · Answer

I often load the dict into a pandas DataFrame then use the plot function of the DataFrame   Here is the one-liner   pandas DataFrame D  index   quantity    plot kind  bar

User · Answer

You can do it in two lines by first plotting the bar chart and then setting the appropriate ticks   import matplotlib pyplot as plt  D    u Label1  26  u Label2   17  u Label3  30   plt bar range len D    list D values     align  center   plt xticks range len D    list D keys         for python 2 x    plt bar range len D    D values    align  center      python 2 x   plt xticks range len D    D keys       in python 2 x  plt show     Note that the penultimate line should read plt xticks range len D    list D keys     in python3  because D keys   returns a generator  which matplotlib cannot use directly

User · Answer

The best way to implement it using matplotlib pyplot bar range  height  tick label  where the range provides scalar values for the positioning of the corresponding bar in the graph  tick label does the same work as xticks    One can replace it with an integer also and use multiple plt bar integer  height  tick label   For detailed information please refer the documentation    import matplotlib pyplot as plt  data     apple   67   mango   60   lichi   58  names   list data keys    values   list data values      tick label does the some work as plt xticks   plt bar range len data   values tick label names  plt savefig  bar png   plt show       Additionally the same plot can be generated without using range    But the problem encountered was that tick label just worked for the last plt bar   call  Hence xticks   was used for labelling   data     apple   67   mango   60   lichi   58  names   list data keys    values   list data values    plt bar 0 values 0  tick label names 0   plt bar 1 values 1  tick label names 1   plt bar 2 values 2  tick label names 2   plt xticks range 0 3  names  plt savefig  fruit png   plt show

User · Answer

Why not just   import seaborn as sns  sns barplot list D keys     list D values

User · Answer

Why not just  names  counts   zip  D items    plt bar names  counts

User · Answer

For future reference  the above code does not work with Python 3  For Python 3  the D keys   needs to be converted to a list   import matplotlib pyplot as plt  D    u Label1  26  u Label2   17  u Label3  30   plt bar range len D    D values    align  center   plt xticks range len D    list D keys      plt show

[python] Plot a bar using matplotlib using a dictionary

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