![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1010205/image.png)
How to plot a function
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Nouha Amine
am 25 Mai 2022
Kommentiert: Sam Chak
am 25 Mai 2022
Hello,
I need to plot a graph with ![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1010160/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1010160/image.png)
where x is between
and
,
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1010165/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1010170/image.png)
y is here between
and
,
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1010175/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1010180/image.png)
Can you help me with it?
Thanks
0 Kommentare
Akzeptierte Antwort
Sam Chak
am 25 Mai 2022
You can do something like this:
x = 0.1:0.01:10;
y1 = x.^(-2.9-0.1);
y2 = x.^(-2.9+0.1);
plot(x, y1, x, y2)
ylim([1e-8 1e0])
xlabel('x')
ylabel('y')
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1010205/image.png)
2 Kommentare
Sam Chak
am 25 Mai 2022
That's strange... I've tested the code on both MATLAB and Octave. Try adding this:
clear all
close all
x = 0.1:0.01:10;
y1 = x.^(-2.9-0.1);
y2 = x.^(-2.9+0.1);
plot(x, y1, x, y2)
ylim([1e-8 1e0])
xlabel('x')
ylabel('y')
grid on
Weitere Antworten (1)
Fabio Freschi
am 25 Mai 2022
You may use fplot
figure, hold on
fplot(@(x)x.^-3,[1 1e5])
fplot(@(x)x.^-2.8,[1 1e5])
% use bi-logaritmic scale
set(gca,'YScale','log','xScale','log')
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