sine bug? - Programmers Heaven

Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Categories

Welcome to the new platform of Programmer's Heaven! We apologize for the inconvenience caused, if you visited us from a broken link of the previous version. The main reason to move to a new platform is to provide more effective and collaborative experience to you all. Please feel free to experience the new platform and use its exciting features. Contact us for any issue that you need to get clarified. We are more than happy to help you.

sine bug?

shaurzshaurz Posts: 22Member
[code]>>> from math import sin
>>> for i in range(10):
print sin(i)


0.0
0.841470984808
0.909297426826
0.14112000806
-0.756802495308
-0.958924274663
-0.279415498199
0.656986598719
0.989358246623
0.412118485242
>>>[/code]

What the heck? Why are there negative numbers there? These are not the answers my calculator gives :-(

Comments

  • shaurzshaurz Posts: 22Member
    Hah, this is silly. I looked at the doc string:

    [code]>>> print sin.__doc__
    sin(x)

    Return the sine of x (measured in radians).
    >>>[/code]

    I was assuming degrees, silly me. I can now get what I wanted like this:

    [code]>>> for i in range(10):
    print sin(radians(i))


    0.0
    0.0174524064373
    0.0348994967025
    0.0523359562429
    0.0697564737441
    0.0871557427477
    0.104528463268
    0.121869343405
    0.13917310096
    0.15643446504
    >>>[/code]
  • infidelinfidel Posts: 2,900Member
    : Hah, this is silly. I looked at the doc string:
    :
    : [code]>>> print sin.__doc__
    : sin(x)
    :
    : Return the sine of x (measured in radians).
    : >>>[/code]
    :
    : I was assuming degrees, silly me. I can now get what I wanted like this:
    :
    : [code]>>> for i in range(10):
    : print sin(radians(i))
    :
    :
    : 0.0
    : 0.0174524064373
    : 0.0348994967025
    : 0.0523359562429
    : 0.0697564737441
    : 0.0871557427477
    : 0.104528463268
    : 0.121869343405
    : 0.13917310096
    : 0.15643446504
    : >>>[/code]

    Very cool! And thanks for the demonstration of the __doc__ attribute.


    [size=5][italic][blue][RED]i[/RED]nfidel[/blue][/italic][/size]

  • CSXMCSXM Posts: 11Member
    : : Hah, this is silly. I looked at the doc string:
    : :
    : : [code]>>> print sin.__doc__
    : : sin(x)
    : :
    : : Return the sine of x (measured in radians).
    : : >>>[/code]
    : :
    : : I was assuming degrees, silly me. I can now get what I wanted like this:
    : :
    : : [code]>>> for i in range(10):
    : : print sin(radians(i))
    : :
    : :
    : : 0.0
    : : 0.0174524064373
    : : 0.0348994967025
    : : 0.0523359562429
    : : 0.0697564737441
    : : 0.0871557427477
    : : 0.104528463268
    : : 0.121869343405
    : : 0.13917310096
    : : 0.15643446504
    : : >>>[/code]
    :
    : Very cool! And thanks for the demonstration of the __doc__ attribute.
    :
    :
    : [size=5][italic][blue][RED]i[/RED]nfidel[/blue][/italic][/size]
    :
    :

    Many times when I start a new python program I first remind myself
    of method usages by doing the following method:
    [code]def help(*args):
    for arg in args:
    print arg.__doc__
    [/code]
    And using it.. :)

  • infidelinfidel Posts: 2,900Member
    : Many times when I start a new python program I first remind myself
    : of method usages by doing the following method:
    : [code]def help(*args):
    : for arg in args:
    : print arg.__doc__
    : [/code]
    : And using it.. :)

    Cool. Newer version of Python have a built-in help() function too.


    [size=5][italic][blue][RED]i[/RED]nfidel[/blue][/italic][/size]

  • CSXMCSXM Posts: 11Member
    : : Many times when I start a new python program I first remind myself
    : : of method usages by doing the following method:
    : : [code]def help(*args):
    : : for arg in args:
    : : print arg.__doc__
    : : [/code]
    : : And using it.. :)
    :
    : Cool. Newer version of Python have a built-in help() function too.
    :
    :
    : [size=5][italic][blue][RED]i[/RED]nfidel[/blue][/italic][/size]
    :
    :

    Yeah, I know, but I mostly use ActiveState Python 2.2.2 and PythonWin ide for "debugging" and so on and it doesn't have it.

Sign In or Register to comment.