Rotate & translate a plot

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fsgeek 2012-12-12

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/56406-rotate-translate-a-plot

Hi guys,

I'd like to rotate a curve by 180 degrees, then translate it across the figure to match up with another curve, as follows:

In order to rotate the curve, I use the following code:

    %Plot the blue curve
    h1=plot(trueStrainRange,trueStressRange,'b-','LineWidth',3);
    %Rotate the curve by 180 degrees
    rotate(h1,[0 0 1],180);

The result is illustrated by the second picture. I then want to move the blue curve so that its left-side fits with the left side of the green curve. In order to achieve this, I tried the following code:

    %Create a new set of x/y coordinates for the translated curve
    y3=trueStressRange-trueStressRange(1)+trueStressRangeFlip(1);
    x3=trueStrainRange-trueStrainRange(1)+trueStrainRangeFlip(1);
    h1=plot(x3,y3,'b-','LineWidth',3);
    %true[Strain/Stress]Range are the original [x/y] coords of the blue curve  
    %true[Strain/Stress]RangeFlip are the [x/y] coords of the green curve
    %x3/y3 are the new x/y coordinates for the blue curve

However, this produces the following result:

It seems that the code I used above used the old data points from the blue curve before it was rotated, causing the original, un-rotated blue curve to overlap the green curve. I want to be able to use the data points from the newly-rotated curve. Are the data points from a rotated plot available so that I can correctly translate the curve?

Cheers,

Louis Vallance