Rearrange halves of yaxis in graph

Question

vanrapa 2019-4-24

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/458216-rearrange-halves-of-yaxis-in-graph

编辑： vanrapa 2020-3-24

Hello,

I need to rearrange my graph. I would like to rearrange the y axis so that, y for x=1.25 to 2.1 will be placed before the y values of x = 0 to 1.25. But there shouldn't be any change in the xaxis. I don't think I can use 'fliplr' for this. But I am not able to figure out the code to do this through indexing.

Pls help me.

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Answer 1

Adam Danz 2019-4-24

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https://ww2.mathworks.cn/matlabcentral/answers/458216-rearrange-halves-of-yaxis-in-graph#answer_372034

编辑：Adam Danz 2019-4-24

在 MATLAB Online 中打开

If I understand correctly, move the section of data from x=1.25 to x=2.1 and place that segment just before x=0.

Assuming you have two variables x & y that were used to plot your data: plot(x,y),

segmentStart = 1.25; 
segmentStop = 2.1; 
placeBefore = 0; 
newIdx = [...
    find(x<min(placeBefore, segmentStart)), ...   %index values prior to insertion point 
    find(x>=segmentStart & x<=segmentStop), ...   %index values of segment to be moved
    find(x>=0 & x<segmentStart), ...              %index values of section between insertion point and start of segement
    find(x>segmentStop),...                       %indes values following the segment
    ];
plot(x, y(newIdx))

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vanrapa 2019-4-25

Works perfectly. Thank you.

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Answer 2

Thorsten 2019-4-24

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https://ww2.mathworks.cn/matlabcentral/answers/458216-rearrange-halves-of-yaxis-in-graph#answer_372033

编辑：Thorsten 2019-4-24

在 MATLAB Online 中打开

i = find(x == 1.25);
y = y([i+1:end, 1:i]); 

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Adam Danz 2019-4-24

编辑：Adam Danz 2019-4-24

This assumes the x values contain the discrete value of 1.25. If there data are x=[..., 1.246, 1.251, ...] this will break. It also asumes the data start with x=0 and end with x=2.1.

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