Axis equal doesn't work?

2018 6 7
2 个回答
更新时间：2022 4 25
16 次查看（30 天）

0 个投票

Hi, could anybody help me to point out why axis equal does not work in my code?
figure(19)
quiver( P1(1), P1(2), D0(1), D0(2), 0 ,'b','LineWidth',2)
hold on
quiver( P0(1), P0(2), D00(1), D00(2), 0,'b' ,'LineWidth',2)
quiver( P1(1), P1(2), D9(1), D9(2), 0, 'g' ,'LineWidth',2)
quiver( P9(1), P9(2), D99(1), D99(2), 0, 'g' ,'LineWidth',2)
quiver( P1(1), P1(2), D10(1), D10(2), 0,'r' ,'LineWidth',2)
quiver( P10(1), P10(2), D100(1), D100(2), 0 ,'r','LineWidth',2)
quiver( P1(1), P1(2), D(1), D(2), 0,'k' ,'LineWidth',2)
plot(x9,y9,'g')
plot(x10,y10,'r')
hold off
axis equal
xlabel('Re')
ylabel('Im')
set(gca, 'FontSize', 14)

5 个评论
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Jan
Jan 2018-6-7
We cannot run your code due to the missing data. Then there is no chance that we can guess, what "does not work" means. Please post the error message or explain the differences between the observed behavior and your expectations.
Emma Blomgren
Emma Blomgren 2018-6-7
Sorry, there is no error message. It's just that I would like the axes to be equal and when I plot they are not equal, although I use 'axis equal'.
Adam
Adam 2018-6-7
May be unrelated to the cause of the problem, but
axis( hAxes, 'equal' )
should always be used rather than just
axis equal
Why rely on an assumption as to it applying to the correct axes rather than explicitly tell it?
Adam
Adam 2018-6-7
编辑：Adam 2018-6-7
Can you attach an image then showing what the plot looks like?
Jan
Jan 2018-6-7
编辑：Jan 2018-6-7
@Emma: What do you expect "equal axes" to look like and what do you observe instead?

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回答（2 个）

Jan
Jan 2018-6-7
编辑：Jan 2018-6-7

1 个投票

According to doc axes the command axis equal does:
Use the same length for the data units along each axis.
So it adjusts the data units or in other word the DataAspectRatio. What do you want to do instead? Maybe you mean:
axis square
Emma Blomgren
Emma Blomgren 2018-6-7

0 个投票

Thank you for your answers, I found the solution to my problem which was to replace 'axis equal' with 'daspect([1 1 1])'.

4 个评论
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Jan
Jan 2018-6-7
Exactly what axis square does also.
Lawrence
Lawrence 2019-3-15
Not for me. daspect([1 1 1]) does exactly what it is supposed to; axis square does not.
Jan
Jan 2019-3-16
@Lawrence: The OP did not tell us, what exactly is wanted. axis square sets the PlotboxAspectRatio to [1,1,1], while axis equal adjust the DataAspectRatio. You do not mention also, what is supposed to be done. If you add this detail, other readers might profit also.
yi luo
yi luo 2022-4-25
Emma: Thans, I encounted the same problem, i.e., (axis equal) not working, and the daspect([1 1 1 ]) fixed it.

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