plotting a linear equation

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Andy
Andy 2012-7-25
评论： Nicholas Copsey 2020-3-28
How do I plot a linear equation y=mx+b?
So let's say I have this:
b0= 3 where b0 is the y-intercept b1= 4 where b1 is the x coefficient
Then:
Y= b0-b1*X
How do I plot this?

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回答（4 个）

per isakson
per isakson 2012-7-25
Try:
b0 = 3;
b1 = 4;
f = @(x) b0-b1*x;
ezplot( f, 0, 5 )
Elizabeth
Elizabeth 2012-7-25
Or:
By all means, the solution method above will work. However, as your function increases in complexity, that command becomes more and more expensive. Try defining your domain x, then, as a vector:
MATLAB code
b0=3; b1=4;
x= linspace(xmin,xmax, n); % Adapt n for resolution of graph
y= b0-b1*x;
plot(x,y)
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Naga Sai
Naga Sai 2017-5-22
编辑：Naga Sai 2017-5-22
xmin,xmax,n undefined variables
Nicholas Copsey
Nicholas Copsey 2020-3-28
xmin, xmax, and n are things you can change in the code for various views of the graph

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Ben Le
Ben Le 2015-12-9
bo = 3;
b1 = 4;
% You can choose any range of x. In this case I chose x is from -50 to +50
x = -50:50;
plot(x,y)
Andy
Andy 2012-7-25
How do I get that into the same graphs? I have points for my data and the equation above is the linear regression. Ezplot gave me two graphs. :(. I want both the points and the linear equation graphed in one figure.

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