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    Hello, Does anyone know what a unit step function curve looks like. The question is

    the unit step function is defined by
    u(t) = {1, t>= 0
    {0, t< 0

    regards
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    (Original post by Perry)
    Hello, Does anyone know what a unit step function curve looks like. The question is

    the unit step function is defined by
    u(t) = {1, t>= 0
    {0, t< 0

    regards
    Its a straight line along the t-axis (x-axis) for t<0 and at straight line along the line u=1 for t>=0.
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    (Original post by ditzy blonde)
    Its a straight line along the t-axis (x-axis) for t<0 and at straight line along the line u=1 for t>=0.
    So there are two hotizontal lines, one at less then t<0 along the x axis and other line at u=1 (y axis) for t>=0?

    regards
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    (Original post by Perry)
    So there are two hotizontal lines, one at less then t<0 along the x axis and other line at u=1 (y axis) for t>=0?

    regards
    Yep, it looks like a pretty pointless graph, but I'm sure it shows something really important!
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    (Original post by ditzy blonde)
    Yep, it looks like a pretty pointless graph, but I'm sure it shows something really important!
    Cheers One other curve, is the Ramp Function curve:- is it like a y=mx +c type curve without the constant, ie at 45 degree angle going into the north east corner.?

    And the other curve was a Rectangular function curve. Whats that one like.

    Regards
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    (Original post by Perry)
    Cheers One other curve, is the Ramp Function curve:- is it like a y=mx +c type curve without the constant, ie at 45 degree angle going into the north east corner.?

    And the other curve was a Rectangular function curve. Whats that one like.

    Regards
    I think the ramp function sound right, but I'm not 100%. The rectangular function will probably be a rectangle plotted on the axes somehow. Do you have the definition for it like the one for the step function?
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    (Original post by ditzy blonde)
    I think the ramp function sound right, but I'm not 100%. The rectangular function will probably be a rectangle plotted on the axes somehow. Do you have the definition for it like the one for the step function?

    Yes it was, rectangular function

    r(t)= {1/h, -h/2<= t <= h/2
    {0, modulus t > h/2

    regards
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    (Original post by Perry)
    Yes it was, rectangular function

    r(t)= {1/h, -h/2<= t <= h/2
    {0, modulus t > h/2

    regards
    Not entirely sure, just tried plotting it and it comes out as:
    a horizontal line along the x-axis until the point t=-h/2
    a horizontal line along the line r(t) = 1/h between the points t=-h/2 and t=h/2
    and a horizontal line along the x-axis after the point t=h/2

    _________------------------_____________

    Kinda like that, being symmetric about the point t=0
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    (Original post by ditzy blonde)
    Yep, it looks like a pretty pointless graph, but I'm sure it shows something really important!

    Hello, For the unit step funtion how does the graph of u(t) + 2 look like is it just raised to 2 in the y axis, ie from zero does the step just jump to 2. And for u(t) -1 does the step go into negative y axis?

    regards
 
 
 
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