Python code

fromurllib.requestimporturlretrieveifinput('Refresh local copy of SOI data from ftp.bom.gov.au/..?\n''Empty input for NO, anything else for YES ')>'':print('Loading...')urlretrieve('ftp://ftp.bom.gov.au/anon/home/ncc/www/sco/soi/soiplaintext.html','soiplaintext.html')data=[]withopen('soiplaintext.html','r')asf:forlineinf:# until table header (the line after '"`UNIQ--pre-00000001-QINU`"'data=[float(_)for_indata]importnumpyasnpx=1876.+1/24.+np.linspace(0.,len(data)/12,len(data),endpoint=False)n=7n2=n//2kernel=np.sin(np.pi*np.linspace(1/(n+1),1.,n,endpoint=False))kernel/=np.sum(kernel)av=np.convolve(data,kernel,mode='valid')importmatplotlib.pyplotaspltfrommatplotlib.tickerimportMultipleLocatorplt.rcParams['svg.fonttype']='none'# text as text, not curvesfig,ax=plt.subplots(1,1)fig.set_size_inches(13,4)ax.fill_between(x[n2:-n2],av,7.,where=av>7.,facecolor='blue',interpolate=True)ax.fill_between(x[n2:-n2],av,-7.,where=av<-7.,facecolor='red',interpolate=True)ax.plot(x[n2:-n2],av,'k-',linewidth=0.4)ax.plot(x,data,'ko',markerfacecolor='#00000040',markeredgecolor='#00000000',markersize=3)ax.set_xlim(x[0]-2.,x[-1]+2.)ax.set_ylim(-43.,40.)ax.xaxis.set_major_locator(MultipleLocator(10.))fig.tight_layout()fig.text(.91,.88,'La-Niña',color='blue',fontname='Verdana',fontsize=15)fig.text(.91,.12,'El-Niño',color='red',fontname='Verdana',fontsize=15)fig.savefig('SOI.svg',format='svg')fig.show()fromreimportsubsvg=open('SOI.svg','r').read()# In the file ...svg=sub(r'[0-9]+\.[0-9]+',lambdax:str(round(float(x.group()),1)),svg)# round to .1f,STYLE=''rest=svg.split(STYLE)# draw the style inforest[0]=sub('z\n"')[1][1:]# identify the symbol name for the markersvg=sub(symbol,'o',''.join(rest))# and shorten it to "o",svg=sub(' *<use x','<use x',svg)# and finally unindent the most frequent lines.open('SOI.svg','w').write(svg)