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Why doesn't my plot "go to infitnity"?

2 次查看（过去 30 天）
Jake
Jake 2023-1-19
编辑： Torsten 2023-1-19
Probably a silly question, but I couldn't figure out the reason! I have,
x = [0.00,0.10,0.19,0.29,0.38,0.48,0.58,0.67,0.77,0.86,0.96,1.06,1.15,1.25,1.34,...
1.44,1.54,1.63,1.73,1.82,1.92,2.02,2.11,2.21,2.30,2.40,2.50,2.59,2.69,2.78,2.88,4.80];
y = [-inf,-0.03,-0.01,0.01,0.03,0.04,0.06,0.07,0.09,0.10,0.11,0.11,0.12,0.12,0.13,0.13,0.13,0.13,0.12,...
0.12,0.12,0.11,0.10,0.10,0.09,0.08,0.07,0.07,0.06,0.06,0.05,0.00];
plot(x,y)
Why doesn't the plot go to infinity?

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回答（1 个）

Torsten
Torsten 2023-1-19
移动：Torsten 2023-1-19
What finite y value do you want -inf to be in the plot ?
Since nobody knows, MATLAB just skips these data points (same for NaN values).
  2 个评论
Jake
Jake 2023-1-19
"MATLAB just skips these data points (same for NaN values)." I didn't think of that!
But what if there is no finite y value at y(1,1) - Like, 0/0 ? Is there a way to make the plot with, say, an exponential line? O.o
Torsten
Torsten 2023-1-19
编辑：Torsten 2023-1-19
Ran in:
Choose additional points near x=0 and evaluate y for these points. This will show the trend for y.
x = 0.001:0.001:1;
y = 1./x;
plot(x,y)

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