Matlab plot emulation function
Matlab plot and Scilab plot2d behave differently.
The function mtlb_plot(varargin) is used by mfile2sci to replace plot(varargin) when it was not possible to know what were the inputs while porting Matlab code to Scilab. This function will determine the correct semantic at run time. If you want to have a more efficient code it is possible to replace mtlb_plot calls when there is no output value, however in this case, you have to set colors manualy:
Caution: mtlb_plot has not to be used for hand coded functions.