how to draw a directional field for this equation?

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Matthew Worker 2021-8-26

评论： N/A 2021-8-30

I am trying to plot directional field for these differential eq.s

a) y’= 0.1y-sin(y)

b) y’ = y^2-3*y+1

c) y’ = -y(y-2)(y-4)/10

I was trying to write it like this, but then I am not sure how to give x.

[x, y] = meshgrid(-2:0.2:3, -1:0.2:2);  
s = 1 - x.*y.^2;    
% for slope function 
% f = 1 - x y^2 
quiver(x,y, ones(size(s)),s), axis tight

darova 2021-8-29

Everything is correct. What is the question?

N/A 2021-8-30

It was a mathematical error. Figured it later. Thank you.

KSSV 2021-8-26

You may have a look on this file exchange function which help you to plot the directional plot.

N/A 2021-8-26

I was asked to write it like ive mentioed by my professor. But I will look into this function too.

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