creating data for matplotlib

Question

I wanted to create graphs for some math functions and tried to do this using matplotlib.I need to plot graphs of several functions in one plot sothat these can be compared against each other.

say these are the math functions

2**(math.log(x,2))
2**(2**(math.log(x,2)))

I tried this

from matplotlib.pyplot import plot as plt
x=arange(1000,1010)
y1=[2**(math.log(t,2)) for t in x ]
y2=[2**(2**(math.log(t,2))) for t in x ]
plt.plot(x,y1)
plt.plot(x,y2)
plt.show()

this only shows one graph..that of (x,y2)

how do I make all the graphs show in one plot?

edit:

using plt.plot(x,y1,x,y2) produces this graph enter image description here

Lev Levitsky · Accepted Answer · 2012-03-24 17:05:11Z

2

I don't think they are going to be visible on the same scale. The first one is essentially y = x, y is about 1000. The second one is y = 2**x, and x starts at 1000...

However, plotting with log scale can help:

matplotlib.pyplot.yscale('log')

answered Mar 24, 2012 at 17:05

Lev Levitsky

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2 Comments

Damon Julian Over a year ago

that could be the problem..I thought the plot would scale

Lev Levitsky Over a year ago

It is scaled so that both plots fit into the window. In such as scale the first plot is a line lying just .0001 mm above the X-axis. Maybe you will see it if you make the line thicker, but for a real comparison linear scale is of no use in this case.

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