I need your help to add a legend to a graph showing two functions labels with different colors

1 次查看（过去 30 天）

Gobert 2015-4-10

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/197089-i-need-your-help-to-add-a-legend-to-a-graph-showing-two-functions-labels-with-different-colors

编辑： Image Analyst 2015-4-10

When I ran the following code in Command Window, I get a legend but with only blue color for e1 and e2 functions. In other words, the plot command specifies a blue line of circles ('-bo') for the e1 function and AGAIN a blue line of circles ('-go') for the e2 function, instead of a GREEN one. Can you please help to get this corrected so that ('-bo') gives blue and ('-go') gives green, in the legend box ?

x = 0:1:10;
e1 = olivier(x);
e2 = olivier(x);
figure
plot(x,e1,'-bo',x,e2,'-go')
title('Graph of round-off error e1 and e2 between 0:1:10')
xlabel('0 < x < 10')
ylabel('round-off error values')
legend('e1 = olivier(x)','e2 = olivier(x)')