How to plot a single variable function with constraints

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Mihai Giurca
Mihai Giurca am 20 Mär. 2020
Kommentiert: Huy Phan Dang am 19 Jul. 2021
Hello, I am trying to plot f(x) = 4 - x*sin(x) with constraints x>=6, x<=9 and log(x)>= -1. I tried using meshgrid but the graph came out wrong + it was in the 3rd dimension. Can anyone tell me how I should go about plotting a simple function with these constraints? Thank you!
  3 Kommentare
Mihai Giurca
Mihai Giurca am 20 Mär. 2020
I'm honestly not sure, my professor gave me these constraints and I'm not sure what the log is supposed to mean.
Huy Phan Dang
Huy Phan Dang am 19 Jul. 2021
log(x) or lg(x) can mean log 10 of x, my education system alway use lg(x) for log 10 of x as shortcut so it might be what your professor meant

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Antworten (2)

Ameer Hamza
Ameer Hamza am 20 Mär. 2020
f = @(x) 4 - x*sin(x);
fplot(f, [6 9]);

Matt J
Matt J am 20 Mär. 2020
Bearbeitet: Matt J am 20 Mär. 2020
You can assign NaN to anything you don't want plotted. Example,
x=linspace(0,2,1000);
f=sin(x);
f( 0.5<=x & x<=1)=nan;
plot(x,f);

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