How can I draw multiple vertical lines in math lab?

How can I draw multiple vertical lines in math lab? I want the distance between them 2 and y start from y=1 to y=20 and the x-axis [1:20]

Answer 1

[Star Strider]

Try this:

figure(1)
plot([1:2:20; 1:2:20], [20*ones(1,10); ones(1,10)], '-r')

Change the color and line-type to create the vertical lines you want.

[Muna Gutub]

what about if I want the distance between them 1?

[Star Strider]

This will work for that, and for any other values of the parameters you choose:

X_min  =  1;                                                            % Initial ‘X’ Value
X_max  = 20;                                                            % Maximum ‘X’ Value
X_step =  1;                                                            % Step ‘X’ Value
Lv = numel(X_min:X_step:X_max);                                         % X-Vector Length
Y_min =  1;                                                             % Minimum Value For Y-Lines
Y_max = 20;                                                             % Maximum Value For Y-Lines
figure(1)
plot([X_min:X_step:X_max; X_min:X_step:X_max], [Y_max*ones(1,Lv); Y_min*ones(1,Lv)], '--r')

You will still need to define the color and line-type (here a red dashed line, defined by '--r'). See the documentation for plot for those options.