Scatter works but Plot gives error

Hi!

I want to make a scatter plot of the weights (y-axis) versus the heights (x-axis), with healthy individuals plotted as green points, underweight individuals as blue points and overweight individuals as red points. I have a code for that but I want to use 'plot' instead of 'scatter'. When I am using plot it gives error - Error using plot Data must be a single matrix Y or a list of pairs X,Y. Error in matlab4 (line 20) plot (H(:,n),W(:,n),2,c,'*').

Thank you!

M=[75,164;67,168;43,152; 56,169; 78,170; 49,157;66,167; 71,181; 120,170]'

W=M(1,:)

H=M(2,:)/100

BMI=W./H.^2;

hold on

box on

for n = 1:length(BMI)

if BMI(n)>=18.5 &BMI(n)<=24.9

c = 'green';

else

c = 'red';

end

scatter (H(:,n),W(:,n),2,c,'*')

end

Answer 1

[Stephen23]

You cannot just swap functions around and expect them to work: they have different calling syntaxes, so you need to call plot with appropriate inputs, which are not the same as scatter inputs. That is why you should read the documentation for each function that you use.

if ...
    lf = 'g*';
else   
    lf = 'r*';      
end
plot(H(:,n),W(:,n),lf)

See also:

https://www.mathworks.com/help/matlab/ref/linespec.html