How do I get Matlab to plot a line with a constant slope?

Question

I have a project to do in matlab where I'm creating a graph with multiple lines. Some of those lines have a constant y value, but when it plots it, it just shows dots for those with constant slopes. The other lines work fine. I want those dots to connect so it looks nice. How do I do that?

For an example code this is what I'm talking about:

x=[1:10]
y=5
plot(x,y)

Answer 1

Subscript indices must either be real positive integers or logicals. You cannot use 0 as a subscript. You should have the same number of elements for x and y. In your first case x has 10 elements but y is a scalar (one value only). Use this, for example: x = linspace(0, 10, 10) y = linspace(5, 5, 10) plot(x,y) Type ' help linspace ' on your command window to see a description on how linspace works.

Answer 2

Subscript indices must either be real positive integers or logicals. You cannot use 0 as a subscript.

You should have the same number of elements for x and y. In your first case x has 10 elements but y is a scalar (one value only).



Use this, for example:



x = linspace(0, 10, 10)

y = linspace(5, 5, 10)

plot(x,y)





Type ' help linspace ' on your command window to see a description on how linspace works.

Answer 3

MODIFIED:



lets consider the graph y=5x+6 and to plot it from x=0 to 10.Here's how we do it:-

x=1:11;

y=5*(x-1)+6;

n=0:10;

plot(y)



it's nothing but the shifting of axes.You take values for x from 1 to 11.However the value of y varies with (x-1) not with x.Hence when x=1,y=5*0+6=6.



and so on.

and while you are plotting the graph you are simply shifting the starting point from 1 to 0.



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