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How to plot y = cos(pi/4)

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James Crowe
James Crowe 2017-10-26
评论： James Crowe 2017-10-26
How do you plot y = cos(pi/4)? Thank you
  2 个评论
Roger Stafford
Roger Stafford 2017-10-26
That is a constant value, namely 1/sqrt(2). It will not give you something to plot.
James Crowe
James Crowe 2017-10-26
编辑：James Crowe 2017-10-26
I need the straight line of it where y = constant. So it should be a straight line at 0.707

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Roger Stafford
Roger Stafford 2017-10-26
Choose upper and lower limits of x as a and b. Choose the desired number of plot points as n.
x = linspace(a,b,n);
y = repmat(cos(pi/4),1,n);
plot(x,y,’y-‘)

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