Could upo please help me to solve my problem?

I am trying to plot a graph with many data, I want to plot each set with a different color and marker. When I use the 8 predefined colors no problem is registered

p = loglog(Q,T,'black.',Q,curve_t,'red-',qbf,tbf,'black+').

The problem comes when I want to define a different color

p = loglog(Q,T,'black.',Q,curve_t,'-','color',[0.75 0.75 0.75],qbf,tbf,'black+');

Answer 1

[dpb]

The latter is unsupported syntax; named parameter/value pairs can only trail all the given x,y,linespec triplets and that particular parameter will apply to all lines. To do what you're trying you'll either have to add lines individually or fix up the desired line color after creating the overall plot...

hL=loglog(Q,T,'k.',Q,curve_t,'-',qbf,tbf,'+k');
hL(2).Color=0.75*ones(1,3);