I save in file it's ok, but I want disable the on-screen display ?

mamos

Hello everyone, dear @backtrader.
I solicit your help because I want to disable the display of the method cerebro.plot (), I wish only saved the image (which I managed) in a file. but now I want to disable the on-screen display.
Thank you

Robin Dhillon

Just dont plot. Write up the savefig method and not the cerebro.plot. Try to read into the docs to see the plotting features.

mamos

@robin-dhillon Thank you for your quick response. Your message will help me.

mamos

@Robin-Dhillon
I can not understand the operation of savefig (), it seems to me that nothing is indicated about it in the doc?
here is the code I used to save to a file:
figure = cerebro.plot (style = 'candlebars') [0] [0]
figure.savefig('example.png')

@robin-dhillon with your advice i try this: Plot_OldSync.savefig ()
I have as error savefig () missing 3 required positional arguments: 'self', 'fig', and 'filename'. I do not understand what coresspond the 'fig' ??
Can someone please enlighten me?

Robin Dhillon

Hello @mamos so there is a workaround this. You would need to make some changes to the original plot functions. I have this code written up for you. put this function at the end of your cerebro initialization and you should be good.

def saveplots(cerebro, numfigs=1, iplot=True, start=None, end=None,
             width=16, height=9, dpi=300, tight=True, use=None, file_path = '', **kwargs):

        from backtrader import plot
        if cerebro.p.oldsync:
            plotter = plot.Plot_OldSync(**kwargs)
        else:
            plotter = plot.Plot(**kwargs)

        figs = []
        for stratlist in cerebro.runstrats:
            for si, strat in enumerate(stratlist):
                rfig = plotter.plot(strat, figid=si * 100,
                                    numfigs=numfigs, iplot=iplot,
                                    start=start, end=end, use=use)
                figs.append(rfig)

        for fig in figs:
            for f in fig:
                f.savefig(file_path, bbox_inches='tight')
        return figs

saveplots(cerebro, file_path = 'savefig.png') #run it

mamos

@Robin-Dhillon Thank you so much for your help!

It works perfectly :)