matlab

%%% beautiful plot:
Linespec

plot(t,sin(2*t),'-mo',...
'LineWidth',2,...
'MarkerEdgeColor','k',...
'MarkerFaceColor',[.49 1 .63],...
'MarkerSize',12)

%%%error bar
Matlab's plot command is not as nice as Gnuplot plot, and, for example, you can't use it to draw a plot with error bars. But drawing plots like that is so important that Matlab has a separate command for that. The command is errorbar , and you should use it in combination with plot, as shown below:

>> plot (x, y_prime)
>> hold on
>> errorbar(x, y, sigma_y, '.')
>> hold off
>>

The way it works is as follows. First we plot y' = a + bx versus xusing the plot command. Then we tell Matlab to hold on to the plot and add other elements to it rather than overwrite it with a new plot. Then we plot errorbars. The last argument in the errorbar command tells Matlab that the points given by (x_i, y_i) pairs should not be connected. Matlab draws them connected by default. The last command, hold off tells Matlab that the plot is finished, and no new elements will be added to it.