PythonQ 240-8XX Manuel d'utilisateur télécharger pdf (Page 29)

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Plotting several curves in one plot

Compare f

1

(t)=t

2

e

−t

2

and f

2

(t)=t

4

e

−t

2

for t ∈ [0, 3]

from scitools.all import

*

#forcurveplotting

def f1(t):

return t

**

2

*

exp(-t

**

2)

def f2(t):

return t

**

2

*

f1(t)

t=linspace(0,3,51)

y1 = f1(t)

y2 = f2(t)

plot(t, y1)

hold(’on’) # continue plotting in the same plot

plot(t, y2)

xlabel(’t’)

ylabel(’y’)

legend(’t^2

*

exp(-t^2)’, ’t^4

*

exp(-t^2)’)

title(’Plotting two curves in the same plot’)

hardcopy(’tmp2.eps’)

Numerical Python – p. 263/728

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