plotting eps function

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Derek
Derek 2012-1-14
Hi,
I am tasked with plotting Y=((1.0+x)-1.0)/x) vs. x on a semilog plot however the plot shows nothing but the axis. Ideally it should be at a value of Y=0 until the x-axis reaches eps(1), at which point there is a step function where Y=1. My code is as follows,
Y=((1.0+x)-1.0)/x;
x=0:eps(1)/10:2*eps(1);
semilogx(Y,x)
axis([0 2*eps(1) 0 1.5]);
Any help would be greatly appreciated.
Thanks!
Derek

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回答（1 个）

the cyclist
the cyclist 2012-1-14
When you applied the axis() function, you are restricting to a region that does not have your plotted points. I think maybe you meant to plot
>> semilogx(x,Y)
or else you need to switch the x and y values in your axis() command.

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