plot a thicker line for my upper and lower specs

The matlab documentation claims that this will give me a thicker line but it keeps generating a syntax error. Any hints on how to thicken this up?

plot(0:600,Cal_12_usl:Cal_12_usl,'r','linestyle','--', LineWidth = 2.0*unit::mm)

Answer 1

[Azzi Abdelmalek]

plot(0:600,Cal_12_usl:Cal_12_usl,'r','linestyle','--', 'LineWidth',8)

[William]

I tried this

plot(reordered_data)
            ylim([24 34])
            hold on 
            plot(0:600,Cal_12_usl:Cal_12_usl,'r','linestyle','--', 'LineWidth',7)

              plot(0:600,Cal_12_lsl:Cal_12_lsl,'r','linestyle','--', 'LineWidth', 7)
              hold off
              rotate3d off;

still does not get thicker :(

[Azzi Abdelmalek]

Check this

t=0:0.1:10;
y1=sin(t);
y2=cos(t);
plot(t,y1,'r','linestyle','--','linewidth',5);
hold on
plot(t,y2,'g','linestyle','--','linewidth',10)