I plot data using plotyy, then after adding several other data series to the plot, i need to readjust the axis limits to have them all in range, but when I do, the limits only occupy a small portion of the plot as seen in the image

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Ryan Hickey 2016-1-29

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https://ww2.mathworks.cn/matlabcentral/answers/265780-i-plot-data-using-plotyy-then-after-adding-several-other-data-series-to-the-plot-i-need-to-readjus

评论： dpb 2016-2-4

The image below shows the problem that I am getting. When i submit the code to change the axis limit for x, there is no issue with the graph, but when i send the code to adjust the left y axis, it shrinks the size as shown below. The data is in the range, but it does not get spread out amongst the full plot area. Any ideas?

Heres the code I use to adjust the axis:

                %Plot both axis's
                [hax, h(1,i), h(2,i)] = plotyy(X_Data(:,i), Y1_Data(:,i), X_Data(:,i), Y2_Data(:,i));
                %Set line color and marker                
                set(h(1,i), 'marker', 'o');
                set(h(1,i), 'color', ColorSet(i,:));
                set(h(2,i), 'marker', 'x');
                set(h(2,i), 'color', ColorSet((ColorVariation - i),:));
                %Set axis limits                
                xlim(hax(1), [xmin xmax])
                xlim(hax(2), [xmin xmax])
                ylim(hax(1), [y1min y1max])

After running this initial data, I add additional plots to the same one to have for example 5 lines corresponding to the left y axis and the right y axis. But I need to be able to adjust the limits to see the data accordingly. Thanks!

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Abhisek Roy 2016-2-4

Hi Ryan,

It looks like at some point in the code the 'XTick' for 'hax(1)' is set as [3.75 3.8 3.85 3.9 3.95] as those are the only ticks which are being marked in the plot and also from the figure, I noticed that the first plot(hax(1)) i.e. the blue plot is spanned through-out the plot window. So, I think in the code somewhere XTicks are defined. Is this the complete code which is giving you the above plot?

dpb 2016-2-4

在 MATLAB Online 中打开

Good catch @Abhisek...also note that while the code snippet says

set(h(1,i), 'marker', 'o');
set(h(2,i), 'marker', 'x');

that the actual markers are reversed from what one would expect given the plotyy call

[hax, h(1,i), h(2,i)] = plotyy(...

the column 1 line handles should be associated with the LH axis and vice versa but by the axis color they're reversed. Things have gotten jumbled, clearly.

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