Plot lables with hold on

plot(R, ':.b') %blue

xlabel('Time')

ylabel('Dollar')

hold all

plot(L, '-.g') %green

plot(D, '--r') %red

I'm using hold all to plot R, D, and L as shown above. How can I show a label for each one with the same color, using 'legend'? Any other suggestion would be appreciated! :)

Thanks,

Answer 1

[Walter Roberson]

You want the colors in the legend to be all the same as each other ("the same color"), or you want the colors in the legend to correspond to the line colors?

If you want the colors in legend to correspond to the line colors, just call legend() and specify the labels: it will automatically use the line colors that were used in the plotting.

[Jalali]

I meant colors in the legend correspond to the line colors.

If I call legend() after the first plot which is before the 'hold all', it only shows R. If I call legend() after the 'hold all', all labels would be shown for the first plot with one color. So, how to deal with legend in this case?

[Walter Roberson]

Call legend() after all three plot() commands have been done: it should use the corresponding colors.

For deeper darker details on legend(), see http://www.mathworks.com/help/techdoc/creating_plots/braliom.html

[Jalali]

I called legend() after all three plot() commands but still the first one is shown.