Seite - 27 - in Programming for Computations – Python - A Gentle Introduction to Numerical Simulations with Python 3.6, Band Second Edition

1.6 Plotting,PrintingandInputData 27 Fig. 1.4 Ball trajectory and functionsf(t)= t2 andg(t)= et as two plots inone figure Note that,whendealingwith subplots, someoverlappingofsubplotsmayoccur. Usually, this is solved nicely by inserting the following line (as at the end of our code), plt.tight_layout() Thiswill causesubplotparameters tobeautomaticallyadjusted,so that thesubplots fit in to thefigurearea. Theplotgeneratedby thecode is shownin Fig.1.4. MakingaHardcopy Savinga figure to file is achievedby plt.savefig(’some_plot.png’) # PNG format plt.savefig(’some_plot.pdf’) # PDF format plt.savefig(’some_plot.jpg’) # JPG format plt.savefig(’some_plot.eps’) # Encanspulated PostScript format 1.6.2 Printing:TheStringFormatMethod We havepreviouslyseen that print(y) will print thevalueof thevariabley. Inanequallysimple way, the line print(’This is some text’) will print This is some text (note the enclosing single quotes in the call to print).Often,however, it is of interest to print variablevalues togetherwith some descriptive text. As shown below, such printing can be done nicely and controlled in Python, since the language basically allows text and numbers to be mixed and formatted inanywayyouneed.