Why is y-axis in loglog not 0?

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Daniel
Daniel 2014-11-20
评论： Thorsten 2014-11-24
Hello,
I am plotting with "loglog". See code.
Why does the y-axis start at 100 and not 0 as I say it should be with y-lim?
MockF1=[120 100 100 140 140 180 180 100 100 100 100];
MockN1=[38500 20000 23720 4096 4532 2754 1820 16921 8241 40622 19040]; figure
loglog(MockN1,MockF1,'o')
xlabel('N');
ylabel('F');
grid on
xlim([0 500000])
ylim([0 250])

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Thorsten
Thorsten 2014-11-21
编辑：Thorsten 2014-11-21
If you do not have to use a loglog plot, semilogx may be useful
semilogx(MockN1,MockF1,'o')
ylim([0 250])
  2 个评论
Daniel
Daniel 2014-11-21
Thank you. I guess I can work with a semilogx but I would prefer loglog.
A follow up question: My y-axis is now in steps of 50. 0 50 100...etc. How can I get it in to steps of 10 or whatever I choose?

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更多回答（2 个）

Azzi Abdelmalek
Azzi Abdelmalek 2014-11-20
编辑：Azzi Abdelmalek 2014-11-20
I think when you set ylim([0 200]) this will be interpreted as [log(0) log(200)]. That means [-Inf log(200)]
Daniel
Daniel 2014-11-21
Thank you Azzi,
When I use: ylim([-inf 200]), I get as seen in the first picture
when I use ylim([-inf log(200)]), I get this
How do I get the values on the y-axis to say 100 etc and not 10^2 and so on?

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