python - Why does pylab.savefig() add multiple plots when pylab.show() doesn't and how can I make it stop? -


my program computes number of diagrams, each multiple plots. when executed using pylab.show(), shows first diagram in window , when close window shows second diagram , on, fine.

when using pylab.savefig(), second diagram contains both plots first , second diagram.

how keep savefig() accumulating plots?

this code i'm using plot diagrams:

# generate multiple plots first diagram label = 4 in nylonlengthlists:  # take list of lists generate multiple plots     pylab.plot(windspeeds,i, label=str(label) + ' m')     label += 1  pylab.title('leinenlaengen nach tiefen') pylab.ylabel('leinenlaenge (m)') pylab.xlabel('windgeschwindigkeit (kn)') pylab.legend(loc='upper left', title='tiefen') pylab.xticks()  pylab.grid() pylab.savefig('diagram1.png')  # generate plots second diagram  nylonlengthlists = []    # reset , regenerate list of lists in range(12,25,2):     nylonlengthlists.append(nylonlengthlist(i, chainlength, boatlength))   label = 12 in nylonlengthlists:    # generate multiple plots     pylab.plot(windspeeds,i, label=str(label) + ' m')     label += 2  pylab.title('leinenlaengen nach tiefen') pylab.ylabel('leinenlaenge (m)') pylab.xlabel('windgeschwindigkeit (kn)') pylab.legend(loc='upper left', title='tiefen') pylab.xticks()  pylab.grid() pylab.savefig('diagram2.png')

closing matplotlib window after pylab.show destroys figure instance. new 1 created @ next plotting command.

to multiple figures without show, call pylab.figure each time want start new plot.


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