day1/exercise/roots.py
author Nishanth Amuluru <nishanth@fossee.in>
Tue, 14 Dec 2010 23:15:36 +0530
branchscipyin2010
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removed sslc1.txt from circulate since it is not required
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import math
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def linspace(a, b, N):
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    lns = []
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    step = (float(b) - float(a)) / float(N - 1)
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    print step
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    for i in range(N):
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        lns.append(a + i*step)
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    return lns
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def sinsin_func():
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    x = linspace(0, 5, 11)
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    sin_list = []
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    for i in x:
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        sin_list.append(math.sin(i) + math.sin(10*i))
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    return sin_list
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def find_root_range():
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    sin_list = sinsin_func()
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    for i, sins in enumerate(sin_list):
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        if (sin_list[i] > 0 and sin_list[i+1] < 0) or (sin_list[i] > 0 and sin_list[i+1] < 0):
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            print "Roots lie between: %f and %f" % (sin_list[i], sin_list[i+1])
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        if sin_list[i] == 0:
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            print "%f is the root" % sin_list[i]
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find_root_range()