Plot out of cell array with attributes

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Maier
Maier 2016-11-18
评论： Maier 2016-11-23
Hi, at first here is my code:
x = zeros(1979,1);
y = zeros(1979,1);
B = cell(1979,1);
for i = 1 : 1979
x(i) = i;
y(i) = i;
if i > 150
B(i,1) = {'bs'};
else
B(i,1) = {'ks'};
end
end
plot(x,y,B(:));
so the x vector contains my x-coordinates and the y-vector my y-coordinates. Now for example I want to plot the first 150 as a blue square and the others should be a black square.
I now that I can do it with a for-loop but in my real case the attributes depend on a a lot of things. So I want to create a cell array which contains the color and the appearance of the marker for each coordinates and to plot it automatically without a for-loop.
I hope you understand what I want to do :)
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Image Analyst
Image Analyst 2016-11-23
I didn't say call scatter hundreds of times to plot hundreds of points point-by-point. I'm saying call it twice. However if you need a custom, unique, totally different pop-up context menu for every single one of the points, instead of one context menu that applies to any/all points, then I don't know - I've never done that before and doubt I'll ever need to do it in the future either. I can't envision any scenario where you'd need a different "context menu which is individual for every point."
Maier
Maier 2016-11-23
Ok anyway thank you.
I'm writing a script to visualize the power flow solutions of an european electrical transmission grid. Every point is a substation of the grid and the context menu contains Information about it (e.g. voltage, name,...) which is individual for every point. Also the markerstyle and color depends from point to point. I'm doing it with a context menu because it gets a lot messy if I would do it any other way.

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回答（1 个）

Nick Counts
Nick Counts 2016-11-19
编辑：Nick Counts 2016-11-19
I think you are looking for gscatter, which allows you to define a "group vector" and then define different styles for each group. It works sort of like logical indexing. There is good documentation, but here is an example:
x = 1:1979;
y = 1:1979;
% Make the group vector.
% The first 150 points are group 1
% The rest are group 2
group(1:150) = 1;
group(151:1979) = 2;
% The colors are assigned blue to 1, black to 2
% The marker styles are square to 1, circle to 2
gscatter(x, y, group, 'bk', 'so')
Hope this helps!
  2 个评论
Maier
Maier 2016-11-23
Hi, thank you! Yes that helps in case of the color and the marker style but I want to add more attributes than these two.
I want something like that:
plot(x,y,'Color',color,'marker',marker,'UiContextmenu',menu....)
where x and y contain the coordinates, color the color attribute and so on... I don't know if thats possible at all.
Image Analyst
Image Analyst 2016-11-23
If you want to control a whole bunch more stuff on a data point-by-data point basis, you're going to have to plot it one data point at a time.

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