finding intersection point between a scatter and vertical lines

Question

Vaultec 2014-7-4

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/140297-finding-intersection-point-between-a-scatter-and-vertical-lines

编辑： Star Strider 2014-7-4

采纳的回答： Star Strider

figure 10.fig

Is there any way to find the y values of the intersection points between a scatter and vertical lines?

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Vaultec 2014-7-4

If possible, Im looking for something that wont require the file exchange, as my script will need to work on multiple copies of matlab

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Star Strider 2014-7-4

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/140297-finding-intersection-point-between-a-scatter-and-vertical-lines#answer_143706

编辑：Star Strider 2014-7-4

在 MATLAB Online 中打开

Use interp1. I had to do a fair amount of coding to get the data from your figure, but since you will have all the original data, you can skip directly to the YIsx = interp1 step:

openfig('figure 10.fig');               % Get figure & extract data
h1c = get(gca, 'Children');
Xdc = get(h1c, 'XData');
DSz = cellfun(@max,(cellfun(@size, Xdc, 'Uni',0))); % Get data sizes
IdxMx = find(DSz == max(DSz));
Xdmx = cell2mat(Xdc(IdxMx));
Xd = cell2mat(Xdc(setdiff(1:length(Xdc),IdxMx)));   % X-values of vertical lines
Ydc = get(h1c, 'YData');
Ydmx = cell2mat(Ydc(IdxMx));
% Yd = cell2mat(Ydc);
YIsx = interp1(Xdmx, Ydmx, Xd(:,1));    % Find intersections
hold on
plot(Xd(:,1), YIsx, '+r', 'MarkerSize',10, 'LineWidth',2)   % Plot intersections
hold off