Attempting to Plot In A Specific Range

33 次查看（过去 30 天）
AnnieLieseMari
AnnieLieseMari 2022-6-15
回答： Voss 2022-6-15
Hello!
I am trying to plot some y-values in a specific range of x-values. I have x-values to -3.5 to 3.5 and should be increasing by one.
The y-values are all over the place, but I need all of them to be plotted. There are 45 values in the y vector.
I attempted to plot them using the following code...
x1 = [-3.5:3.5]
% y is a 45 x 1 single vector
plot(x1, y, '-')
However, when I do so, I get an error saying the vectors need to be the same length. What can I do to limit the y-vector to only contain values that fall in the x range?

请先登录，再回答此问题。

回答（2 个）

Torsten
Torsten 2022-6-15
编辑：Torsten 2022-6-15
x1 = (linspace(-3.5,3.5,numel(y))).';
plot(x1,y,'-')
Voss
Voss 2022-6-15
Ran in:
You will need a vector, the same length as y, containing an x value for each y value.
Let's say you have that vector and it's called x.
% Let's say this is your vector of x values
% (increasing by 1)
x = -21.5:22.5
x = 1×45
-21.5000 -20.5000 -19.5000 -18.5000 -17.5000 -16.5000 -15.5000 -14.5000 -13.5000 -12.5000 -11.5000 -10.5000 -9.5000 -8.5000 -7.5000 -6.5000 -5.5000 -4.5000 -3.5000 -2.5000 -1.5000 -0.5000 0.5000 1.5000 2.5000 3.5000 4.5000 5.5000 6.5000 7.5000
Then you can plot the points (x- and y-coordinates) where x is between -3.5 and 3.5 like this:
% (make up some random y)
y = rand(1,numel(x));
% limit the plot to those values of x between -3.5 and 3.5
idx = x >= -3.5 & x <= 3.5; % or idx = abs(x) <= 3.5;
plot(x(idx),y(idx))

类别

在 Help Center 和 File Exchange 中查找有关 Line Plots 的更多信息

标签

产品


版本

R2022a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by