Plotting error: Axis limits cannot be NaN or Inf

oalexandere

Hello there!
The simple code get an error, could you please give an advise what's may be wrong.

from __future__ import (absolute_import, division, print_function, unicode_literals)

import backtrader as bt
from backtrader.feeds import GenericCSVData

feed = 'XAU=.csv'
data = GenericCSVData(dataname='.\\data\\' + feed, name=feed,
                      dtformat='%d.%m.%Y',
                      separator=';',
                      datetime=0,
                      time=-1,
                      open=1,
                      high=2,
                      low=3,
                      close=4,
                      volume=-1,
                      openinterest=-1)

cerebro = bt.Cerebro()
cerebro.adddata(data)
cerebro.run()
cerebro.plot()

Data in csv:
Date;Open;High;Low;Close
01.01.2010;1096.25;1096.9;1096.05;1096.35
04.01.2010;1095.85;1123.4;1093.05;1120
05.01.2010;1120.9;1127.7;1114.85;1118.65
06.01.2010;1118;1140.2;1115.6;1138.5
07.01.2010;1137.8;1138.75;1128.2;1131.9
08.01.2010;1131.35;1139.3;1119.45;1136.1
11.01.2010;1136.8;1161.5;1136.8;1152.6
12.01.2010;1151.15;1158;1124.95;1127.3

Getting error:

Traceback (most recent call last):
File "C:/Users/-/YandexDisk/Codes Python/Algo/Bob GS/ex2.py", line 45, in <module>
cerebro.plot()
File "C:\Users-\backtrader_env\lib\site-packages\backtrader\cerebro.py", line 991, in plot
start=start, end=end, use=use)
File "C:\Users-\backtrader_env\lib\site-packages\backtrader\plot\plot.py", line 220, in plot
self.plotdata(data, self.dplotsover[data])
File "C:\Users-\backtrader_env\lib\site-packages\backtrader\plot\plot.py", line 634, in plotdata
data, opens, highs, lows, closes, volumes, vollabel)
File "C:\Users-\backtrader_env\lib\site-packages\backtrader\plot\plot.py", line 580, in plotvolume
ax.set_ylim(0, volylim, auto=True)
File "C:\Users-\backtrader_env\lib\site-packages\matplotlib\axes_base.py", line 3226, in set_ylim
top = self._validate_converted_limits(top, self.convert_yunits)
File "C:\Users-\backtrader_env\lib\site-packages\matplotlib\axes_base.py", line 2836, in _validate_converted_limits
raise ValueError("Axis limits cannot be NaN or Inf")
ValueError: Axis limits cannot be NaN or Inf

Thank you!

Paska Houso

@oalexandere said in Plotting error: Axis limits cannot be NaN or Inf:

File "C:\Users\osipov\backtrader_env\lib\site-packages\backtrader\plot\plot.py", line 580, in plotvolume

That should be the key line since there seems to be no volume in your data. Try plotting disabling the volume.

oalexandere

Thanks! Works

cerebro.plot(volume=False)

But in page https://www.backtrader.com/docu/plotting/plotting.html
I found:

        # Wether to plot volume or not. Note: if the data in question has no
        # volume values, volume plotting will be skipped even if this is True
        self.volume = True

A little bit strange, thought changing to Flase will be automatically.

Paska Houso

Which is probably True (written in the best Python tradition) if your volume is 0, but since you have no volume and reading the error message:

ValueError: Axis limits cannot be NaN or Inf

it seems your volume is probably given a value of Nan. It might even be that NaN evaluates slightly different between Python 2.7 and 3.x.