How to plot a simple curve

I am trying to learn MATLAB and have stumbled straight away. Can someone please tell me how you plot y = x^2 for x = 1 to 10.

Answer 1

[the cyclist]

Keeping as close as possible to your notation, to be clear to you:

 >> x = 1 : 0.1 : 10;
 >> y = x.^2;
 >> plot(x,y)

Note that the 0.1 is there to define the intervals. You'll get a smoother curve in your plot if this value is small; the vector will have correspondingly more elements.

I agree with Jiro that you will benefit from a careful read of the documents he references.

[Robert]

Thank you, this is what I needed, sometimes it can be difficult trawling through documentation when you just want a simple answer. And it was the dot before the power sign that had me lost.

Answer 2

[Matt Fig]

Or, if you want to be able to do this for a general function (or more):

g = @(x) x.^2; % Create your function for plotting.
h = @(x) x.^2.5;  %Create a second function.
x = 1:.01:10;  % Create the range for the functions.
plot(x,g(x),'r',x,h(x),'b') % Use a red line for the first, blue for second.

To only plot one function:

plot(x,g(x))  % See help plot for more options.

Answer 3

[Jiro Doke]

This is a very basic question and we have many places in the documentation for you to learn:

1. plot
2. Learn MATLAB

Answer 4

[Sean de Wolski]

 plot(1:.1:10,1:.1:10.^2)%x = 1 to 10 with spacing of 0.1

Also read the getting started documentation.

%SCd

[Matt Fig]

Your code will error, Sean de. You are trying to plot different length vectors!

Answer 5

[Doug Eastman]

Another useful function for plotting simple expressions is EZPLOT:

ezplot('x^2',[1,10])

or

ezplot(@(x) x.^2,[1,10])

Answer 6

[Erick]

hello, how do I change my axes to have different ranges? for my graph below? and I want the curves to run from the x-axis upward to right

[the cyclist]

I suggest posting this as a new question, rather than burying as an "answer" to a 3-year-old question.

[Yundie Zhang]

haha,,,,,

set x axix and y axis limits

xlim()

ylim()

Answer 7

[le nhat]

how to paint graph with data activity

[the cyclist]

I suggest posting this as a new question, rather than burying as an "answer" to a 5-year-old question.

Answer 8

[Ademolawa John]

hello , pls how can I plot this curve that run from top left to bottom right with Y axis running from 1 to 16 and x from 1.8 to 2.7. Thanks