Attempted to access colors(6); index out of bounds because numel(colors)=5

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Priya
Priya 2014-6-24
评论： Star Strider 2014-6-26
Hi, I tried executing this loop,
colors = ['m';'y';'b';'g';'c'];
loop_ind = 1;
for k1 = 1:5
figure(4);
linespec = colors(loop_ind);
plot(x, y, linespec, 'LineWidth', 1);
loop_ind = loop_ind + 1;
hold on
end
legend('-0.02','-0.01','0','0.01','0.02')
But I get an error,
Attempted to access colors(6); index out of bounds because numel(colors)=5. Error in test_contact_ellipse (line 228)
linespec = colors(loop_ind);
Now I'm getting the plot with the correct colors but the legend doesn't appear. How can I rectify this error.
Please give your suggestions.
Thanks
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Sara
Sara 2014-6-24
Attach x and y, with random data it works fine. Are x and y multidimensional arrays by any chance?
Sara
Sara 2014-6-24
You'll need to include all the variables and the files, or I won't be able to run your code

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采纳的回答

Star Strider
Star Strider 2014-6-24
This is an example that plots in different colors with a matching legend:
c = [0 1 0; 1 0 0; 0 0 1; 1 0 1; 0 1 1];
x = linspace(0,2*pi);
figure(4)
hold on
for k1 = 1:size(c,1)
plot(x, sin(x*k1)+k1, 'Color', c(k1,:))
end
hold off
grid
legend('Color 1', 'Color 2', 'Color 3', 'Color 4', 'Color 5')
Adapt it as necessary to your application.
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更多回答（1 个）

Sara
Sara 2014-6-24
In the last loop, replace with the following and see if it is what you are looking for:
figure(4);
plot(x, y, 'LineWidth', 1,'color',colors(k2))
axis square;
axis equal;
grid on;
xlabel('Longitudinal');ylabel('Lateral');title('Contact ellipse shape');
hold on
myh = line([xCenter, xCenter], [yCenter - yRadius(k2), yCenter + yRadius(k2)], ...
'LineWidth', 1, 'Color', [1,0,0]);
set(get(get(myh,'Annotation'),'LegendInformation'),'IconDisplayStyle','off');
myh = line([xCenter - xRadius(k2), xCenter + xRadius(k2)], [yCenter, yCenter], ...
'LineWidth', 1, 'Color', [1,0,0]);
set(get(get(myh,'Annotation'),'LegendInformation'),'IconDisplayStyle','off');
It seems that some of your ellipses are overwritten with others. Since I don't know what you are doing, this is the best I can recommend. I'd replace also:
for k2 = 1:size(a,2)

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