How to plot a line on a log plot

jnaumann

2013 9 月 3

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I am trying to plot a line on a log plot. I am using the same method as if I was to draw a line on a standard plot ie. hold on, plot(x,y) etc. Instead of plotting the line it just plots 2 dots. Is there any way to get around this?

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the cyclist 2013 年 9 月 3 日

Can you just post your code, or ideally a very distilled example that shows what you mean?

jnaumann 2013 年 9 月 3 日

>> semilogy(x,final_matrix(:,2))

>> ylabel('Kurtosis')

>> hold on

>> plot([141/4 141/4],[0 4000],'--k')

The second plot function just plots two points rather than a line

Thanks

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the cyclist 2013 年 9 月 3 日

編集済み: the cyclist 2013 年 9 月 3 日

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Well, I can't replicate your plot, because I don't have access to your variable final_matrix, but I am suspicious of your plot() command having a zero in it. log(0) is -Inf, so I think you may have a difficult time plotting that.