Problem With Axis Limits

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Conor J Crickmore
Conor J Crickmore 2015-11-28
评论： Star Strider 2015-11-29
Hello all,
First post here but have found many a solution previously so keep up the good work!
I am working on a Script that produces various loads exerted on a Gearbox and am running into some issues with my plots.
I am plotting both Shear Force and Bending Moment in the same graph which is working perfectly fine with the only issue being that MATLAB sets my maximum x-axis value at 0.45m whereas the shaft is only 0.411m. If I use either axis (ymin ymax 0 0.411) or xlim (0 0.411) or ANY value below the 0.45 default, MATLAB shrinks the entire graph to fit between those values rather than just cutting off the empty space. If someone could tell me what I am doing wrong that would be great!
Code:
figure (1);
hold on;
set (figure (1), 'outerposition', [390 50 750 750]);
set (gca, 'units', 'normalized', 'position', [0.125, 0.125, 0.75, 0.75])
[ax, p1, p2] = plotyy (x_V, V_Y, x_M, M_Y);
plot (x_M, M_Yo, 'r--')
xlim ([0 0.411];
title ({'Shear Force & Bending Moment' ; '[Y-Plane]'});
xlabel ({'Distance From Bearing 1' ; '[m]'});
ylabel (ax(1),{'Shear Force' ; '[N]'});
ylabel (ax(2),{'Bending Moment' ; '[Nm]'})
hold off;

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回答（1 个）

Star Strider
Star Strider 2015-11-28
I can’t run your code so only offer a few things for you to experiment with:
axis tight
axis equal
and see the documentation for axis for all the wonderful things the function can do.
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Conor J Crickmore
Conor J Crickmore 2015-11-29
编辑：Conor J Crickmore 2015-11-29
Ah! I think you may be correct there.
While both plots start at x = 0 and end at x = 0.411, the Shear Force plot have six values (it is a step graph) while the Bending Moment only has four - is that what is causing the issue?
BMx = 0, 0.0075, 0.227, 0.411
SFx = 0, 0.075, 0.075, 0.227, 0.227, 0.411
How would I upload an image of the figure to help further?
Star Strider
Star Strider 2015-11-29
It could be. This is just my current hypothesis.
To upload the figure as an image, first use the floppy-disk icon in the figure window to save the plotted figure as a .png image. Then back here in MATLAB Answers, use the brown-framed green landscape icon to upload the image. Be sure to complete both the ‘Choose file’ and ‘Insert image’ steps.

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