Surface plot with semilog z-axis: how to keep the same axis limit for iterative plots?

Question

Xh Du 2017-5-3

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/338507-surface-plot-with-semilog-z-axis-how-to-keep-the-same-axis-limit-for-iterative-plots

评论： Xh Du 2017-5-4

采纳的回答： dpb

test.mat

在 MATLAB Online 中打开

Hi all,

I have an algorithm which generates 4 surfaces iteratively. I'd like to set the z-axis to semilog scale and keep the same z-axis limit for all iterations. Here is the code:

x = 1:5;
y = 1:5;
axisLim = 0.0007;
for i = 1:4
    subplot(1, 4, i)
    surf(x, y, errPreStore{i});
    axi_lim = [0, axisLim];
    zlim(axi_lim)
    axis tight
    axis square
    set(gca, 'ZScale', 'log');
end

However from the surface plot you can see that the z-axis does not remain the same for these 4 plots. How can I fix it? I've attached the test.mat file so you can import and plot.

Thanks!

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Answer 1

dpb 2017-5-3

1
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https://ww2.mathworks.cn/matlabcentral/answers/338507-surface-plot-with-semilog-z-axis-how-to-keep-the-same-axis-limit-for-iterative-plots#answer_265485

编辑：dpb 2017-5-3

在 MATLAB Online 中打开

Use

zlim([zMIN zMAX])

that you want before beginning the iteration.

Didn't read carefully enough, sorry...you're using mutually exclusive commands and the last in effect are those from axis...

doc axis
...
axis tight sets the axis limits to the range of the data and sets the
XLimMode, YLimMode, and ZLimMode properties to auto. 
Use axis tight manual to set the limit mode properties to manual.
...

So, right after you set the z-axis limit manually your overwrite it and set it back to 'auto' with the axis tight call.

Try something more like...

for i = 1:4
  hAx(i)=subplot(1, 4, i);  % save the axes handles always
  surf(x, y, errPreStore{i});
end
set(hAx,'zscale','log')
axis(hAx,'square')
axis(hAx,'tight', 'manual')
set(hAx,'zlim',axi_lim)

which results in

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Xh Du 2017-5-3

编辑：Xh Du 2017-5-3

在 MATLAB Online 中打开

Hi,

I modified my code like this:

x = 1:5;
y = 1:5;
load('test.mat')
for i = 1:4
    axisLim = 0.0007;
    axi_lim = [0, 0.0007];
    zlim(axi_lim)
    set(gca, 'ZScale', 'log');
    subplot(1, 4, i)
    surf(x, y, errPreStore{i});
    axis tight
    axis square
end