When i plot a 2D plot and then try to label the axis only the label appears and the graph disappear

Hi everyone,

Im very new to matlab and im trying to learn from "getting started with matlab" . I have successfully plotted a 2-D sinusoid plot, but when i try to plot the axis, the graph disappears and the axis is plotted against a blank plot.

The same thing happens when i use ' hold on ' function. A blank plot appears after i use hold on.

x = linspace(0,2*pi);

y = sin(x);

plot(x,y)

hold on

y2 = cos(x);

plot(x,y2,":")

legend("sin","cos")

hold off

This is code im tring to use. Can anyone please explain what im doing wrong.

Answer 1

[Gabriel Quattromani]

Use 1 line to plot both graphs, as such:

x = linspace(0,2*pi);

y = sin(x);

y2 = cos(x);

plot(x,y,x,y2,":")

legend("sin","cos")

[Vivek Anand]

Thanks a lot Gabriel. It worked !!

[Vivek Anand]

Just out of curiosity ,do you know why hold on function was not working for me?