how to change the direction of this code from right falling into left to left falling into right

Question

lior 2024-8-21，14:42

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https://ww2.mathworks.cn/matlabcentral/answers/2146929-how-to-change-the-direction-of-this-code-from-right-falling-into-left-to-left-falling-into-right

编辑： Naga 2024-8-21，15:29

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Answer 1

Naga 2024-8-21，14:51

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编辑：Naga 2024-8-21，15:29

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Hi Lior,

To change the direction of the falling dots from left-to-right to right-to-left, the initial plot position is shifted from (10, 10) to (0, 10) to start from the left. The loop is modified to iterate from 1 to 9 instead of 9 to 1, and the y-coordinate in the plot function is adjusted to 10-y. Please find the modified code below:

plot(0, 10, 'r.', 'markersize', 40)

axis([-1, 11, -1, 11])

for y = 1:9

plot(y,10-y, 'r.', 'markersize', 40)

axis([-1, 11, -1, 11])

pause(0.3)

end

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lior 2024-8-21，15:13

more precisly, from (0,10) on the axis to let's say (1,0) or (1,1)

Naga 2024-8-21，15:26

编辑：Naga 2024-8-21，15:27

I realized I misunderstood your question, so I've revised my response accordingly.

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Answer 2

Voss 2024-8-21，14:54

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figure
x = 1:10;
y = 10:-1:1;
for ii = 1:numel(x)
    plot(x(ii),y(ii),'r.','markersize',40)
    axis([-1,11,-1,11])
    pause(0.3)
end

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Voss 2024-8-21，14:57

在 MATLAB Online 中打开

Another option:

x = 1:10;
y = 10:-1:1;
figure
ax = gca();
h = line(ax,'Color','r','Marker','.','MarkerSize',40);
set(ax,'XLim',[-1 11],'YLim',[-1 11])
for ii = 1:numel(x)
    set(h,'XData',x(ii),'YData',y(ii))
    pause(0.3)
end