Richard Stanton <stan...@haas.berkeley.edu> writes: > Here’s a sample Python code block: > > #+begin_src python :results file :exports both > import matplotlib > matplotlib.use('Agg') > import matplotlib.pyplot as plt > import pandas as pd > > df = pd.DataFrame({'date': [1900, 1901, 1902], 'x1' : [3, 4, 5], 'x2' : [6, > 7, 9]}) > df.set_index('date', inplace=True, drop=True) > df.plot() > plt.savefig('x4.png') > return 'x4.png' # return filename to org-mode > #+End_src > > When I run it, the graph appears on the screen and in the named file, as > desired. > > However, if I go back, change one of the numbers, and rerun the block, > while it claims to have run OK, the graph is not updated. I only get a > new plot if I also change the file name (e.g., to x5.png). It looks > like it’s refusing to over-write an existing file. Is there a reason > for this, and is there a way to change this behavior? > > By the way, this is with org-mode 8.3beta-884-g9ed426 >
IIUC, you eval the code, hit the resulting link (which opens a buffer with the graph), change a number and reeval the code - do you hit the link again? That should ask you whether you want to read the changed file again and show the updated graph. Nick