How to make a curve fill the whole plotspace

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Arne
Arne 2025-3-21
编辑： Walter Roberson 2025-3-21
Vb0_vec = [10 1000];
mb_vec = (20*10^-3)*(36*pi*Vb0_vec.^2).^(1/3);
rhog0 = 0.169;
lambda = 0.0173;
y = linspace(0, 120000, 50000);
% plot 3: beperkende factor voor capaciteit
W_10 = Capaciteit(y, Vb0_vec(1), lambda, mb_vec(1), rhog0);
W_1000 = Capaciteit(y, Vb0_vec(2), lambda, mb_vec(2), rhog0);
figure(3)
loglog(y, W_10)
hold on
loglog(y, W_1000)
hold off
The output looks like this:
How can i make the curves cover the whole plot (touching both axes)?

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采纳的回答

Walter Roberson
Walter Roberson 2025-3-21
编辑：Walter Roberson 2025-3-21
You have the same y each time, but the visible coverage is different. For log plots the implication is that the data either becomes non-finite or becomes negative.
[min10, max10] = bounds(y(isfinite(W_10) & (W_10>0)));
[min1000, max1000] = bounds(y(isfinite(W_1000) & (W_1000>0)));
minb = min(min10, min1000);
maxb = max(max10, max1000);
xlim([minb, maxb]);

更多回答（1 个）

Mathieu NOE
Mathieu NOE 2025-3-21
Ran in:
hello
try this :
have log spaced x vector (with power of 10 limits) should do the job (fastest fix)
and 500 to 1000 points should be enough to get a good quality plot
Vb0_vec = [10 1000];
mb_vec = (20*10^-3)*(36*pi*Vb0_vec.^2).^(1/3);
rhog0 = 0.169;
lambda = 0.0173;
% y = linspace(0, 120000, 50000);
y = logspace(1, 5, 1000);
% plot 3: beperkende factor voor capaciteit
W_10 = Capaciteit(y, Vb0_vec(1), lambda, mb_vec(1), rhog0);
Unrecognized function or variable 'Capaciteit'.
W_1000 = Capaciteit(y, Vb0_vec(2), lambda, mb_vec(2), rhog0);
figure(3)
loglog(y, W_10)
hold on
loglog(y, W_1000)
hold off
  2 个评论
Arne
Arne 2025-3-21
Thank you for your answer. Your suggestion fixes the problem on the left side. On the right side however the graphs don't go all the way down to zero. I think i would need a way to have the points on the right side be closer to eachother.
Mathieu NOE
Mathieu NOE 2025-3-21
hello again
can you share your function Capaciteit ?

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