Fill between two lines not working

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Saugat Shrestha 2020-4-9

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/516685-fill-between-two-lines-not-working

评论： Saugat Shrestha 2020-4-11

I am trying to fill the between the lines but its is only plotting the limiting lines. I cant seem to understand the problem.

Hope you can help. Thanks in advance.

figure(2)
    semilogx((f_Along)*(0.1/WS),f_Along.*((PSD_AL_M))/WSP^2,'Color',...
        'k','LineWidth',2)
    hold on
    semilogx((f_Along)*(0.1/WS),f_Along.*((SD_AL_P))/WSP^2,'Color',...
        [0.7 0.7 0.7],'LineWidth',2,'DisplayName','STD+')
    hold on
    semilogx((f_Along)*(0.1/WS),f_Along.*((SD_AL_N))/WSP^2,'Color',...
        [0.7 0.7 0.7],'LineWidth',2,'DisplayName','STD-')
    hold on
    x2 = [(f_Along')*(0.1/WS), fliplr((f_Along')*(0.1/WS))];
    inBetween = [f_Along'.*((SD_AL_P'))/WSP^2, fliplr(f_Along'.*((SD_AL_N'))/WSP^2)]
    fill(x2, inBetween,  'k');
    hold on

3 个评论
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Walter Roberson 2020-4-10

It would be easier if we had your data so we could test on our own system to avoid accidentally giving you a solution that does not work for your situation.

Saugat Shrestha 2020-4-10

Variables.mat

I have attached the variables.

Thanks in advance.

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回答（1 个）

Star Strider 2020-4-9

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/516685-fill-between-two-lines-not-working#answer_425048

Plot everything (including the patch calls) using linear axis rulers first, then convert the scale to logarithmic.

See How can I shade confidence intervals on a loglog plot? for an example.

8 个评论
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Star Strider 2020-4-10

在 MATLAB Online 中打开

@Saugat Shrestha — It would have helped to have had your data at the outset. As Walter points out, the problem is that ‘f_Along’ begins with 0. Since log(0) appraches -Inf, the transformation fails for patch.

Add before you create ‘figure(2)’:

f_Along = f_Along + eps;

and after the patch (or fill) call:

xlim([f_Along(2) f_Along(end)])
set(gca, 'XScale','log')

@Walter — Thank you.

Saugat Shrestha 2020-4-11

@Walter Roberson, I did as you instructed and it worked.

Thank You so much.

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