run regression, change the value of x and calculate how y changes, and then plot both

2 visualizaciones (últimos 30 días)
(Revised) Suppose I have a table T
y x1 x2
10 3 4
7 2 3
5 1 2
run a regression
mdl =fitlm([T.X1, T.X2],T.y)
Then I now want to calculate T.y1 for T.x3= T.x1-1 using the above fitlm formula
y x1 x2 x3
10 3 4 2
7 2 3 1
5 1 2 0

Respuesta aceptada

Image Analyst
Image Analyst el 28 de Jul. de 2021
Use a for loop to alter T.X1
for numRuns = 1 : 10 % However many you want
x = [T.X1, T.X2];
mdl =fitlm(x, T.y)
% Plot stuff...
plot(x, T.y, '-');
grid on;
hold on;
% Now do something with mdl, like get T.y1.
% Now decrement T.X1 by 1 and do the next run.
T.X1 = T.X1 - 1;
end
  5 comentarios
Image Analyst
Image Analyst el 28 de Jul. de 2021
Wow, that's helpful.
Maybe I'll get to it someday then.
So, did you try to adapt the for loop where I reduced X1 by 1 on each iteration? If not, why not?
alpedhuez
alpedhuez el 28 de Jul. de 2021
https://www.mathworks.com/help/stats/linearmodel.predict.html

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