plot - strange behaviour for big numbers

Grzegorz Knor

2016 11 10

0 个回答

2 次查看（30 天）

0 个投票

I've found a strange behavior of plot function in MATLAB 2015b (Windows 7). Namely this code:

plot([1,1],[1e+19,100])

produces line from 1e+19 to 100. But if I zoom it by dint of command:

xlim([0, 2])
ylim([-10, 110])

I obtain the following figure:

After changing y axis limits:

ylim([-10 1200])

Everything is OK:

I cannot (fortunately) reproduce it in MATLAB 2012b. Do you have any idea what happens?

3 个评论
显示 1更早的评论隐藏 1更早的评论

Grzegorz Knor 2016-11-11

Generally, I plot a data (with outliers like 1e+19), so to see an interesting region I use ylim command. I've noticed this strange behavior, when I used a function for conditionally colored line plot . The result was odd, and I found how to reporduce it, so this is an explanation of the simple code in my question :)

I will try use other render options as soon as I will have access to the MATLAB.