How do I get the equation and display on the graph for line of best fit?

Question

Sujala Swaminathan 2020-7-2

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/558142-how-do-i-get-the-equation-and-display-on-the-graph-for-line-of-best-fit

编辑： Ameer Hamza 2020-7-2

采纳的回答： Ameer Hamza

x=[0.200 0.100 0.067 0.050 0.040 0.033 0.025];

y=[0.214 0.158 0.130 0.125 0.136 0.115 0.107];

axis([0 0.025 0 0.025]);

plot(x,y,'x');

hold on

title('lineweaver-burk plot');

xlabel('1/S');

ylabel('1/Vo ');

figure(2)

scatter(x,y);

%Plotting the line of best fit

p=polyfit(x,y,1);

x1=linspace(min(x), max(x), 100);

y1=polyval(p,x1);

plot(x1,y1,'r-', 'LineWidth',3);

X_int = roots (p);

y_int = p(2);

hold off

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Answer 1

Ameer Hamza 2020-7-2

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/558142-how-do-i-get-the-equation-and-display-on-the-graph-for-line-of-best-fit#answer_459790

编辑：Ameer Hamza 2020-7-2

Try this

x=[0.200 0.100 0.067 0.050 0.040 0.033 0.025];
y=[0.214 0.158 0.130 0.125 0.136 0.115 0.107];
axis([0 0.025 0 0.025]);
plot(x,y,'x');
hold on
title('lineweaver-burk plot');
xlabel('1/S');
ylabel('1/Vo ');
fig = figure(2);
ax = axes();
scatter(x,y);
%Plotting the line of best fit 
p=polyfit(x,y,1);
x1=linspace(min(x), max(x), 100);
y1=polyval(p,x1);
plot(x1,y1,'r-', 'LineWidth',3);
X_int = roots (p);
y_int = p(2);
eq_str = sprintf('y = %.2fx + %.2f', p);
text(min(x)+0.02, max(y)-0.01, eq_str, ... % An example of setting the position
    'FontSize', 16)